Engine Fire after V1 [Archive]

411A

1st May 2001, 10:12

Interesting discussion. In the mid-eighties, Saudi Arabian had a very ah....interesting incident on departure from JED in a B747SP at max weight. At rotation, number two engine had an uncontained failure with bits injested into the number one engine, causing an engine fire warning. The F/E, without saying anything, pulled the number one fire handle, leaving the aircraft with two operating engines at 900 feet. Not a pretty picture. The Captain (PF) descended to approximately 300 feet to enable acceleration to flap retraction height and climbed away at 250 knots, started fuel dump immediately, and returned for an overweight landing. Goes to show that inappropriate action at low altitudes can be dangerous. They were VERY lucky.

1st May 2001, 11:45

From an engineering viewpoint, engine firewalls are built to withstand 120 seconds of fire (98% sure I remember the time correctly :)). Plenty of time to get things sorted out before starting to pull fire handles.

Cheers,
/ft

Ignition Override

2nd May 2001, 08:29

You folks have the big picture. Supposedly, many years ago an Air Force C-9 (DC-9 -30 series) crashed while departing Scott AFB, about 20 miles east of St. Louis, MO. They supposedly had a fire warning (very loud bell plus red lights) at or just after rotation. The new copilot supposedly grabbed and pulled out a fire handle-the handle which was NOT illuminated! This shut off fuel to the good engine and down they went, having lost or about to lose thrust from the engine with the red light in the handle. That's what I remember having heard.

Because of that accident, Douglas recommmended only flying the plane and cancelling any warnings (d****d loud fire bell!) until a minimum of 800' AGL.

One of our pilots had been flying years for an airline, along with part-time AFRES missions in the four-engine C-141 McChord AFB, Tachoma, WA. During an engine fire on rotation in the simulator, the pilot was given an engine fire. The pilot waited until about 1,000' before he called for the Engine Fire Checklist (whatever the title). He told us that as he watched the red lights go on while he flew to a safe altitude, the excited Stan-Eval/Check Airman (or IP) blurted out "aren't you gonna shut it down?" etc, he told the guy that you don't need to grab anything at low altitude which will shutdown a critical component such as an engine. The "line pilot" was not failed for preventing various hands (3 or 4 crewmembers) from snatching fire handles/fuel control levers until safe coordination could take place.

Sometimes certain elements of US military aviation, with the tense combat mentality, in contrast to airline operations, relied years ago (if not still now) upon quick memorized reflex actions (i.e. reject/abort takeoff for ANY malfunction up to "refusal speed" /V1) in stead of pausing for a few moments, which were meant to be a substitute for experience, but this is not meant to be a sweeping generalization or a critique.

411A

2nd May 2001, 10:46

Have noted in the past that a few pilots retired from UK carriers and flying on contracts in the "developing world" have insisted that the fire drill be done at 400 feet, irrespective of the standard company procedures, confusing the new F/O's no end. Their reasoning seemed to be that they...."did not want the wing to burn off", or so they said. This is not likely with a pod engine and suspect that this thinking was held over from the Comet days.
Anyone here flown the Comet and care to speculate? Surely the Comet had wing structure to cope with this situation or, maybe not.

fireflybob

2nd May 2001, 16:36

Here comes a small voice of dissent!
Why 400' - what's so special about this height?
Everything presupposes that the aircraft is under control and will remain so but tell me a pilot in the world that is going to sit on his hands for long with a fire warning!

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m&v

2nd May 2001, 17:35

In the good 'olde'days,SOP's stipulated :with a "poss'rate of climb" one could call for the 'eng fire drill'DC8/747. thence the builders(boeing) felt that too much was being done-!too low down! ergo the Industry advocated,that it was safer,to get some height prior to pushing and pulling levers,with the required 'other pilot'confirmation.The'alt'to initiate the drills vary,from 400,-800,

Centaurus

2nd May 2001, 18:27

My trusty B737-200 Boeing published PTM (Pilot Training Manual)states:

Methodically accomplish the engine failure checklist procedure after the airplane is under control, gear and flaps have been retracted, and a safe altitude has been attained.
Indications of fire, impending engine break-up etc, should be dealt with as soon as possible. The recall items of the appropriate checklist should be methodically completed by or at the command of the Captain
Unquote.

In this PTM, Boeing does not define what is a "Safe" altitude. But it does advise that indications of fire...should be dealt with asap. Clearly, time is absolutely vital with a blazing engine. From the cockpit you may not be able to see how bad is the fire, therefore it would be wise to consider the worst - and act promptly.

A rushed decision at low height could lead to a serious situation if someone pulls the wrong lever due mis-identification. But then look what happened at the Kegworth B737 accident, where mis-identification took place at cruise altitude.

So back to the question of what constitutes a safe altitude for action following a engine fire after V1?

Each company publishes a figure (such as 400 ft agl) primarily for reasons of crew standardization. Could be that 400 feet is too late to pull the fire handle in some instances, and adequate time in other instances. Horses for courses. Which may be why Boeing (for example)do not specify or recommend a specific height, and leave it to the pilot's judgement of the prevailing circumstances, to decide a "safe" height.

411A

2nd May 2001, 18:32

M&V--
You may be surprised to learn that many US carriers (and others as well) do not commence engine fire drills until the aircraft has completed flap retraction. Have watched many times in the sim (even with experienced crews) early fire drill actions leading to massive height and directional loss, resulting in a sim crash that in three cases, put it out of action for two days.
Far better IMHO to wait awhile. This is true in jets today unlike in the DC-7 days where an engine fire was MUCH more serious. Some it would appear do not keep up with the times.

Bored Cheese

2nd May 2001, 18:36

Fireflybob
400' is the min height AAL to commence acceleration in an aeroplane operated under Perf A rules. However, most jet operators schedule Segment 3 acceleration and clean-up at a higher altitude for many different reasons. This variation is allowed for in the T/O performance calculations.

Flanker

2nd May 2001, 19:57

Recently did an initial and recurrent course at Flight safety Tucson, on both occassions was actively encouraged to consider stopping for an engine fire warning from above V1 and even airborne('Hell if ya gat a long runway.......')Yeah well where in the flight manual are these runway figures published?This I hasten to add is NOT the published F.S view to stopping so why are these guys teaching this rubbish?

Our (company)resident trainer also wanted us to do the fire drill at 1500ft when our SOP's say 400ft.I was the weird Brit with the bad attitude because I wanted to be standard!

I have never started the(fire)drill at other than 400 ft and have never seen any problems if people are properly trained.Boeing mainly and some Airbus.

FireFlyBob I agree, in a real Jet when something's burning that isn't designed to I don't think many people would enjoy the wait!
P.S.When are you coming back to fly proper gear- you obviously miss it? :)

fireflybob

2nd May 2001, 20:39

Hi Flanker - just as soon as I can get a job that suits! On the other hand there might be more money in aviation journalism soon!

In a previous life with another company (dare I say it - in the training department!) we decided, after much debate, to specify that 200 ft would be a minimum height for emergency drills etc., so long as aircraft control was not a factor.

Perhaps we should also bear in mind that the type of failure is relevant. If it's just (sic) a fire, the engine may well be developing full thrust in which case there is the asymmetric control problem to deal with as opposed to a severe failure where (perhaps) the engine is producing no thrust at all.

Maybe we all agree that it's all just a question of priorities (Rule 1 "Fly the A/c") but as I stated before I do not think many pilots will delay too long when they get a real fire warning!

I suggest that in many instances just, initially, retarding the thrust lever will go a long way towards redusing the seriousness of an engine fire - the rest of the drills can be completed later on.

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Alex Whittingham

2nd May 2001, 21:32

JAR 25 states that "Except for gear retraction and automatic propeller feathering, the aeroplane configuration may not be changed, and no change in power or thrust that requires action by the pilot may be made, until the aeroplane is 400 ft above the take-off surface."

Reference at http://www.jaa.nl/jar/jar/jar/jar.25.111.htm

FAR 25 says the same thing.

[This message has been edited by Alex Whittingham (edited 02 May 2001).]

2nd May 2001, 22:21

Flanker, in what type of aircraft was your initial/recurrent training?
Strange folks that they tell you to abort the takeoff after V1. Depends a bit on the type of aircraft you're flying of course. If you're in a King Air on a 13,000 ft long runway, it's a different thing than in a B747. But still, V1 is V1.

Consider that a high speed abort might be more dangerous than taking it into the air. How about brakes catching fire, tires blowing up, losing control of the aircraft, when maybe you would have been in full control if you did a circuit.

If you take it in the air (and the plane should be able to fly on n-1) and come back, you will have the full runway available to come to a complete stop. Plus, your mindset will be different, you will be prepared for your touchdown and deceleration to a stop.

So there are two options:
1. High speed abort
2. Take it in the air

Whichever is the least dangerous course of action is the one that should be taken, I think.

quid

3rd May 2001, 08:47

AW-

Part 25 is the "certification" reg. It says what the *a/c* must be capable of doing.

What the *pilot* does is governed by his company procedures, and that may mean a power change.

Slasher

3rd May 2001, 09:21

Didnt an Emerald Airways Andover (or HS748?) abort above V1 a year or so ago? I must admit if I was taking off full-length in my 737 on a 12000ft dry runway with the runway-limit V1 greater than V2, and I heard a loud bang and fire warning at Vr (or just after), Id bloodey stop too. Rather have the thing burning on the ground than in the air anyday.

Flanker

3rd May 2001, 10:56

Slasher

What if it was a fire warning without the bang?Is it really burning?Has it damaged the tyres,brakes?If you do slide off the runway what's the terrain like?

I can't answer all the above in a split second so I'll stick to the usual plan thanks.It might stop, it will almost certainly fly.If you stop and it all goes wrong but you're lucky enough to live you may well be going to jail.(I know...you'd rather be alive in jail than dead...)

To quote Flight Safety on the official view high speed rejects beyond V1 are 'notoriously and disastrously unsuccessful'.We certainly don't train that way.

Always willing to learn though if you can point me to events supporting your view.Concorde sadly comes to mind.

As I'm sure you know there aren't very many long runways in the UK anyway.

Rgds

FE Hoppy

3rd May 2001, 16:37

411A
Not comet but Nimrod,
yes there is a big problem with a fire on one engine spreading to the other. The firewall in between the engines is called RIB 2 and has its own overheat detection for hot gasses.
If you recall the nimrod that ditched in the morray firth a few years ago had an uncontained fire that spread to both engines and burned through the wing. When the wing started warping the skipper decided to ditch. All crew suvived.
It's a while ago but I'm sure we still waited till positive climb before doing anything.
On a side note you couldn't stop the bell till the fire was out without pulling cbs.
very off putting.

[This message has been edited by FE Hoppy (edited 03 May 2001).]

Zeke

6th May 2001, 14:19

fly_boy

Our A319/A320 procedures are to raise the gear, cancel the lights, and toga if required.

Look at the fire at 1500 ft, the aircraft will climb out at 2500 fpm going through 1500 quickly with both running, much slower and more chance of hitting something on one engine.

Been shown both methods in the sim, ecam actions at 400 ft, or 1500 ft, I now like the 1500 ft method.

At 1500 ft the whole ecam procedure can be accomplished safely with the autopilot on, so the pilot flying can monitor the aircraft and the pnf carring out the checks, down low too much is happening to monitor the a/c and pnf.

:rolleyes:

boofhead

9th May 2001, 05:21

Again it is the armchair warriors trying to legislate safety. Boeing says to carry out recall actions only when the airplane is safely under control.. That is all you need to know.
If you take off with an engine on fire (warnings are inhibited but the message is still clear) you must be under control, so if you wish you can do the recalls as soon as you are off the ground and gear is selected up.
A real pilot will make a decision based on the conditions he is experiencing at the time. Obviously if you are having control problems you would leave it alone for a while, and if the weather was bad or a dark night etc...
So many guys now say "at 400 feet I will..." What crap. It might be safe at 100 feet, or unsafe at 800 feet. Give me a break.
An example: a 747 taking off at LAX. The #2 engine starts surging. It gets worse and worse as the airplane starts to climb away, the gear is up. The FO reaches over, since the Capt has done nothing and said nothing, and retards the throttle slightly. The surging stops.
The captain angrily pushes the throttle up again, the surging starts again, even worse than before, and says "Wait til 400 feet!"
The engine was damaged, had to be shut down, fuel dumped and landed back with 400 passengers to deal with. The engine had to be replaced. Boeing procedures might have prevented a lot of that, but let's replace airmanship with regulations.
Come on, guys, the manufacturer has done all the studies, all the certification. Why do we insist we know better?

Slasher

9th May 2001, 06:35

Boofhead you dont need to rush into things in a modern jet aircraft. Rule # 1 in any emergency is sit on your hands first (except arguably a fire/failure etc near V1).

PS Your 747 LAX example (surge/stall) was NOT an emergency. The FO was correct and the capt deserves his *rse kicked.

[This message has been edited by Slasher (edited 09 May 2001).]

Flanker

9th May 2001, 12:40

So lets get this straight,when its[b]not[b/] an emergency, its OK to p*ss about with the throttles below 400ft?

john_tullamarine

9th May 2001, 12:52

I have been following this thread with some interest.

The comments generally are skirting around three principal concerns:

(a) emergency actions planning is a matter of risk assessment and risk management; ie pay more attention to that which is going to kill you soonest, and try not to turn a small problem into a major screw up.

(b) in a (well trained and competent) multicrew environment, one-man-band cowboys and off-the-cuff decision making scenarios generally are bad news. While one can always find examples which might suggest that the procedural rules are not sound (eg the Concorde accident and the DC10 (as I recall) which lost the port wing LEDs) the probability of a satisfactory outcome in the event of mishap is, on the majority of occasions, enhanced by adopting well thought out and standardised procedural approaches to the implementation of emergency procedures.

(c) at the end of the day, one's actions, in the event of an accident, will need to be justified in an appropriate legal forum, presuming that one survives.

If I may offer several comments of my own..

(a) the previous reference to FAR 25 and changes below 400 ft is unfortunate and misses the point. FAR 25 is an airworthiness standard .. operating standards are specified elsewhere. The requirement referred to is intended to stop the manufacturer 'cheating', eg by scheduling a manual thrust reduction to reduce Vmca problems or by scheduling a manual thrust increase to improve WAT performance. The requirement only addresses the engine failure case - considerations of when fire drills ought to be commenced are a separate (operational) consideration altogether.

(b) In regard to risk issues, accident histories and sim studies clearly suggest that rehearsed drills and predictable sequences have, generally, a better outcome than letting Cowboy Bob rule the range, sixshooters in hand.

Given that fire warnings during takeoff occur relatively infrequently, and that many are subsequently found to be false warnings, there is an argument for de-emphasizing the need for immediate panic (sorry, action).

On the other hand, the likelihood of an OEI flightpath's deviating outside the obstacle trapezoid, or the shutdown manoeuvre's ending up in a UA, is an immediate and very real risk. In my experience on endorsement training, the majority of pilots under training (even those with considerable experience in similar jets) perform more reliably if the workload is well managed. Throwing a low level engine shutdown into the soup pot on a takeoff from an obstacle limiting airport is usually not as satisfactory as getting the aircraft up a bit first and then worrying about the system problem ... after all, if you hit the hill, or go in inverted, the (probably false) engine fire is not really all that important. I would take the view that it doesn't matter whether the recommendation is 400 feet or 200 feet or 1000 feet ... the important thing is to keep the priorities sensibly ordered.

(c) in respect of initiating an RTO from above V1, this presupposes that the pilot concerned is competent to assess the distance numbers involved and this is generally not the case - brake energy considerations aside. Boeing has a very useful little video based on the 757 and looking at the RTO manoeuvre in which the message is strongly pushed that the risk is better managed if the takeoff is continued and a planned recovery made with whatever resources might be required being available.

An interesting thread, nonetheless ....

ejector seat

10th May 2001, 01:37

What would have happened if AF Concorde had aborted after V1? (I haven't seen this discussed but may have missed it.)

Is it possible there would be some survivors? I don't have detailed technical knowledge but presume it wouldn't have been able to stop on the runway, although it did eat up a lot of Rwy after V1, nearly leaving the left side, I think.

I suppose there is no way they could have known in that moment how catastrophic the problem was, but if they had, maybe the option to stop would have made sense?

Any opinions?

E S

john_tullamarine

10th May 2001, 06:11

Re the Concorde, I have yet to read an authoritative detailed report. However, I think we would all agree that the crew was faced with one of those nightmarish horrors which we have all contemplated over a beer.

It is quite obvious that, whatever the crew did, the outcome was going to be unpleasant at best. In the event, the continued takeoff evidently led to a directional departure and subsequent uncontrolled impact with predictable results ...quite possibly this was one of those times when the after V1 RTO option may have been the better course. The remaining option, of course, was to throw the beast back onto the ground, off airport, when the control problems became manifest. I have no knowledge of the local topography so I can only speculate. I always recall the Sioux City DC10 accident ... it is quite amazing just what can be survivable.

It is very important to remember that the certification performance doesn't provide any guarantees at all.. only some reference data ... the pragmatist would likely take the risk averse position that the crew did their best within their training experiences with the information available in a very dynamically developing situation but it was just one of those days when taking a sickie would have been the better option ......

4dogs

10th May 2001, 12:56

Folks,

I worry about post V1 RTO discussions.

In the vast majority of cases, it means the captain deciding to definitely trash the aeroplane rather than fly it and possibly trash it. A split second decision, counter to all training and advice (ignoring the turkeys at FlightSafety), based on what information?

Did our compatriots in Concorde know what was actually going on - I don't think so. They didn't have the benefits of countless replays of the external view (which in truth many commentators still got wrong) and they had nothing to convince them that the aircraft would not fly away.

There will always be situations where the likelihood of trashing the jet is equal (double engine failure in a 3/4 holer just past one engine V1 without lots of runway remaining, for one!) and thus surviveability of the impact becomes the controlling factor. But I suggest that you need very clear and unambiguous indications to abandon the continued take-off after V1.

As to the example of the clever FO vs the dumb captain: there are a bunch of CRM issues involved and they are not all one way! The greatest priority must be to achieve a safe flight path and then to calmly deal with the problem in a co-ordinated and organised fashion. How quickly you proceed to that second step will be determined by the time available before there is likely to be a collateral control/damage consequence.

Hasten slowly...

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Stay Alive,

[email protected]

Slasher

10th May 2001, 16:12

Yes Flanks, especialy when my 737 has its PMCs inop and I have to fiddle with the throttles at Vr to stop the little eager CFMs from busting their 930 deg TO EGT limit.

[This message has been edited by Slasher (edited 10 May 2001).]

Lucky Angel

11th May 2001, 00:28

We don't do anything until 400ft agl or flap retract unless the prop does not autofeather(dash8-300).
I think there are good reasons for doing that because even if an engine is on fire after t/o it still produces power which you need and also because at a busy time like that where you really need the power and are so close to the ground ,you don't really want to be making a rashed decision wich could lead you into shutting down the wrong engine.

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Fly high be safe !!

boofhead

12th May 2001, 01:41

I prob went too far with the example, but my point is that we should use the manufacturer's procedures and not make them up ourselves. Altitude is not the only thing we need to think of before doing anything that might upset the applecart. By writing and briefing "Nothing until 400 feet" primes the non-thinking pilot (more and more of those all the time) to react to the altimeter. Losing the airplane at 400 feet or at 1500 feet in a big airplane will have the same result. Boeing says "when safely under conrol" and that is all that is necessary.
And for the 400/800 feet boyos, what do you do if an engine goes into reverse on lift off, or two engine out of 4/3 fail at the same time? You will never even get to 400 feet if you don't do something straight away.
I fly with too many FOs (who will be captains soon) who cannot think or prioritise. They are the products of the "rules and numbers" managers and have never learned. But they know the rules, and with AIMS and such, fly in fear of being caught breaking a rule, no matter how minor or stupid. I have them overbanking and descending through the altitude and not even noticing because they must get the seat belt sign or landing light switch on, since that is the "procedure".
Personally I would probably wait until 1000 feet or so before shutting down an engine for a fire warning. I object to requiring an altitude for the action, since that is not a correct nor sensible way to decide.
I have said it before and I say it again: You cannot legislate safety.

12th May 2001, 10:33

Slasher, if you're in that once-in-a-lifetime situation where you need to continue after a V1 engine failure, would you care about busting the EGT limit for a short while?

Flanker

12th May 2001, 11:28

Boofhead

I fly a Boeing ,but I don't fly forBoeing.

I follow company rules because they have generally been refined over long years of experience.

Sometimes 'thinking' pilots think their way right into trouble.

boofhead

12th May 2001, 12:41

Flanker. If your company had a better way to do it then Boeing would copy it. (And Airbus etc). If your company had the better way then other companies would copy it. That this does not happen proves the fallacy of companies changing procedures based on their own experience.
For example, a new airplane type is introduced and the pilots who flew the older version or similar are sent to do the type rating with Boeing/Airbus/Fokker and they do the quickie version (free). They do not understand the reasons for the procedures, and are taught very superficially (I know, because I've been there).
When they come back, they proceed to rewrite the manuals so that they agree with what they are used to, such that Airbus guys put Airbus procedures in Boeing manuals and vice versa, and old techniques such as flight control checks during taxi instead of before start are retained. The procedures take no account of the new technology, and because the management types who are doing it don't know enough about the new airplane a lot of it's potential for safer and more efficient use is lost.
All this before the airplane is even used in service for the first time! And heaven forbid we might try the manufacturer's recommendations first! (Boeing might make great airplanes (sorry, aeroplanes), but they don't know sod all about operating them!) The cry of the ignorant.
Then you newbies, second or third generation types, who have never seen it done the right way, are trained how it is done Here, and by goodness, we are the world's most popular/best/successful/profitable airline, so we must be doing it right!
Well this might come as a surprise, but you are far from doing it right, as your posts show. You are just doing it the best you can since you cannot/will not learn the right way. The result is and will continue to be a failure to reach the full potential of your airplanes and pilots. Sure it is adequate, but is that what you aspire to? Adequate?

Flanker

12th May 2001, 13:27

Wow Boofhead

Certainly lit your rocket!

One thing aviation is full of is variety,I have seen lots of different ways of doing things(even on the same type).To me the important thing is that we all have some idea what to do and what the other guy is going to do in an emergency.You sound like a one man band.

You make too many assumptions, mainly that everything you think and everything you do is correct.You're right,I'm not that clever.

With all that Ford Trimotor and B17 time who am I to argue?

We were talking about engine fire not reverser deployment.RTFQ!

boofhead

12th May 2001, 16:06

Flanker. yeah, you can see how I got my name! I don't mean to come across as a knowitall, for I am most definitely not one of them. I am trying to make the argument for the opposite position, so I guess I am not making my point very well. The discussion started as a Fire drill, sure, but if you apply an altitude requirement to that, why not to all recall drills? Do you think the average guy would know the difference?

Flanker

12th May 2001, 17:30

Boofhead

The thing is that we are expected to conform to our ops manual requirements, so yes most of the standard drills are exactly that-standard. If I started changing things on my own(without good reason), the trainers would be very unimpressed and rightly so IMHO.I like operating this way.By the way my company is now very close to standard Boeing.

I have flown for six jet transport operators and they all train similarly in this area.OK five of these were UK companies and the sixth run largely by Brits.Is this where the differences arise? (411A leave it!!)

I have seen pure manufacturer checklists on the Lear 60 and I thought they were awful,not at all practical,unless you're a barrister!

I agree strongly that Airmanship is vital,but equally so is a disciplined environment.But if you think you might die before getting to 400 feet I wouldn't recommend waiting!

Rgds

boofhead

13th May 2001, 03:57

Flanker. You must be skimming what I wrote (proof that those who do not want to learn will refuse to try), I did not advocate ignoring company procedures. I rant against it in fact. I am saying that those who write these procedures should stick to the maufacturer's recommendations. Many companies think they have not only the right but the duty to put their own stamp on the Ops Manual, and the result is often inefficient and dangerous.
It should be possible for any B767/747 etc pilot to fly for any airline and use the same checklists, procedures and callouts, with only minor variations.
I think there is no reason to put an altitude restriction on the decision to carry out recall drills after takeoff. Such drills should be carried out as per the manufacturer's procedure, using training and airmanship to ensure that this is done safely. The trainers should discuss altitude as one of the criteria in making the decision, sure, but every case is going to be different in the real world and fixating on one instrument can be counter productive. It is not safe at 390 feet but OK at 400? If 400 is safe, then 800 must be twice as safe. And if that is true, then 1600 is even better! Why not 3200? Surely you can see the futility in this, and that is why those who developed the procedures did not mandate altitude in the decision process.
And a line trainer should know his company's manuals very well. He should ensure that all the pilots he flies with use the manuals and do not make up their own procedures.
And no, my first "real" airplane was not the Trimotor, it was the DC3. We used the original Douglas manuals and they were great. I wish I had kept one, just for the photos alone.

411A

13th May 2001, 06:05

Boofhead--
Very good ideas, too bad many companies do not follow. Noted that SQ years ago used the Boeing supplied procedures and checklists on the B707, to everyones delight. Then the company got bigger and started to "adjust" the checklists on other fleets, to try to match one another. Better to stick with the original plot.

TwinNDB

13th May 2001, 09:15

Was just reading the previous page with regard to stopping a takeoff after V1. Now I'm a novice at this game and certainly don't have any experience in jets BUT I was under the impression that to abort a takeoff at or just before V1 needed the use of everthing. Brakes, spoilers, reverse thrust etc...

I'm jsut wondering that if you go to abort the takeoff after V1 because of an engine fire, do you really want to be using reverse thrust - possibly making the problem worse?

Anyway - like I said, I'm no expert on this topic and have infact only got a couple of hundred hours and mostly fly singles, so please excuse me if this seems a silly comment to the rest of you.

ejector seat

14th May 2001, 01:03

TwinNDB

I guess the questions was 'if you know that, even after V1, continuing take-off will result in a crash, do you try and stop anyway?'

I asked this question before reading a post about Concorde in the Rumours forum which implies that the aircraft 'in the opinion of some' should not have commenced its take off roll anyway. If any of this is true, it sounds like a much more complex and loaded situation than I had supposed.

Martin.

Slasher

14th May 2001, 21:43

Iz your way off the mark. Try actualy reading the posts.

Flanker

16th May 2001, 01:48

Boofhead

Just because I dont agree with you doesn't mean I am happy with 'adequate'or don't want to learn.If that was the case I wouldn't be discussing this with you,would I?

Boeings way works but so do many others and I like using others too!

The standard recall drill height is a simple compromise between 'Flying the Aeroplane' and dealing with the problem.There will always be possible exceptions.Too radical?
:rolleyes:

If 411A agrees with you,you must be on a loser!

boofhead

16th May 2001, 19:07

Don't mean to offend, Flanker. I work with a good bunch of guys and we discuss our job and what we see going wrong a lot. I find there are some who have done it the same way with one company for many years and firmly believe that their way is the best. They resist even considering different ideas. No two airlines are the same, but if you look at the differences from Boeing procedures, hardly any of the changes stands up to scrutiny.
Some airlines like to have what they call "Standardization" whereby when they buy a 744 they try to maintain the 747 classic procedures, to assist crews in upgrading. They try to marry the checklists and operating procedures for the hydraulics and flight controls, and so on. In the process they dumb down the 744. When all the classics are gone, they still have the dumbed down procedures. But if you are brought up in that environment, you will not even be aware that it has shortcomings.
Some airlines even dumb down the new generation airplanes such as the 733 so that they can operate it with the 732 using the same crews. In this instance they remove the ability of the crews to use LNAV/VNAV and even Alt Capture. Again, what happens when the 732s are retired? Meanwhile the crews in this company get used to this and are not aware that it is a pretty silly way to do it.
But an even more insidious problem is not with guys like you, who obviously care about the profession and take some time to think. The bigger worry is the newbies, who have never had the chance to see it done right, and have never been taught how to think. They fly the airplane in a rote manner, with the management writing rules and regulations every day to cover the eventualities they can imagine their crews might have to face. If the pilots follow the procedures, they think, they will know what to do.
Unfortunately, it is impossible to cover all the possibilities and for the crews to remember all of the procedures. Sometimes the problem is not easy to diagnose and the wrong procedure will be followed.
Far better to train the crews to think and to use judgement and experience. What we used to call airmanship.
Like the starving villager, if you give him a fish you feed him for a day, but if you teach him to fish he will be able to feed himself.
This is what the Boeing procedures do. They emphasise the basics and if followed, will cover all normal and non-normal situations, resulting in safe and efficient flight. A pilot who knows how to think does not need to be told what altitude he must have to carry out a fire drill after takeoff. A pilot who is trained to operate by rote will need to be told. This type of pilot will never be better than adequate.