PPRuNe Forums

PPRuNe Forums (https://www.pprune.org/)
-   Safety, CRM, QA & Emergency Response Planning (https://www.pprune.org/safety-crm-qa-emergency-response-planning-93/)
-   -   Polish LOT 767 wheels up landing (https://www.pprune.org/safety-crm-qa-emergency-response-planning/467899-polish-lot-767-wheels-up-landing.html)

Teevee 1st Nov 2011 22:22

Just SLF but even I don't understand Lear60's criticism.How long would you have had to fly round in circles to burn off enough fuel and reduce weight to have anything like the chance of the landing they eventualy achieved? I would have thought trying to land sooner, heavier and with a lot more fuel (and no wheels which is also probably a pretty big drawback)would have been far more dangerous?

TRey 1st Nov 2011 22:33


And consider this: it doesn't make any difference at all whether you try your luck at alternate gear extention (which is supposed to work anyway) in New York, or eight hours later in Warsaw.
In my opinion, a perfectly logical decision. You just can't beat Murphy if he decides to fail the alternate system as well. Looks to me the crew played the hand they were dealt perfectly.
Unless Murphy shows up over the Atlantic and demands to go to Greenland in the middle of the night.

captplaystation 1st Nov 2011 22:34

You may be SLF (your description , not mine, you pay my wages ! ) but you are right.
lear60, is, possibly, professional, but is not, at this moment, being so. QED

jet_noseover 1st Nov 2011 22:39

Awaryjne l

Half way through the article there is a pic of the LOT16 burning fuel while flying over Warsaw.

The tower tells the pilot, no gears and wishes them good luck.

Capt Kremin 1st Nov 2011 22:43

The C system has three independent pumps powered by two independent sources. Therefore the only likely way for the system to completely fail is total fluid loss.

The landing gear has a Alternate system which relies on electrically releasing the three landing gear uplocks and allowing them to fall under gravity. You cannot selectively lower each landing gear via the Altn system so in all probability the entire Altn system also failed.

On the face of it, there must have been multiple failures on this aircraft. C hydraulic system, Altn Landing gear system? The question will be why.

Great landing by the crew, but I'd hold off on lionising them until all the facts are known.

I am a glider pilot too... but knowing how to fly a glider probably contributed very little to the safe outcome of this incident.

piotro 1st Nov 2011 22:46

One more movie from landing, different angle.


If embedded doesn't work for you then click on it to open it directly on youtube


MoodyBlue 1st Nov 2011 22:51


Unless Murphy shows up over the Atlantic and demands to go to Greenland in the middle of the night.
Yes, that would make for a bad day - but only really so in the very remote case of a second hydraulic system failing (of course I'm not considering exploded tires or something of the like here, which could possibly damage multiple systems).
I guess it all depends on how comfortable you are with statistics and odds of 10 to the minus X.

White Knight 1st Nov 2011 22:52


Originally Posted by Ptkay
Cpt. Wrona is a glider pilot, he perfectly kept the glide slope and AoA

So he flew an ILS approach then:hmm:? It was only the wheels that were missing I believe, not the engines:ugh:

IcePack 1st Nov 2011 22:53

Mm! No spoilers even after full touch down. :confused:

captplaystation 1st Nov 2011 22:53

When, 22 years ago, I started flying 737's, I was told ( & how many times subsequently forgot ? ? ? :rolleyes:) whatever, WHATEVER the problem, check the circuit breakers, then, you, or the first officer, get out the seat, slide it forward, & check again, because many, many , faults can be fixed in 1 second by resetting a tripped circuit breaker.

As I retire for the evening, my fondest wish , for Polish colleagues, is simply that the system that controls the releasing of the up-locks, has not "malfunctioned" by the simple expedient of requiring that someone reset a circuit breaker.
This being the case, I understand, whole-heartedly the mistake, & can also predict (accurately) the outcome of the court of enquiry.

Hoping it is nothing of the sort, & that the guys involved are going to bed sometime later tonight I imagine,"well rested " :zzz: after combatting the effects of dehydration following a long transatantic flight. :D

Edited to say, the CB's on a 737 are hidden, in every nook & cranny possible, but principally behind where you sit,the 757 (& I guess 767? ) appears to present most of them right above your skull, so,my paranoid scenario is much less likely I guess/hope.

Clandestino 1st Nov 2011 23:11


Originally Posted by Skol
I've always found that it pays to wait until the Court of Enquiry finishes its work before handing out the medals.

"Nice landing" medal is due even if the inquiry finds out that the problem was crew generated or aggravated. It can easily turn out to be otherwise. Patience on overall grading is fine.


Originally Posted by Hotel Tango
I really can't believe the hype about a straight forward wheels up landing. There's nothing extraordinary about it. Any commercial pilot is capable of it. It's not that unusual an event.

You might actually be correct, in some parallel universe, where widebodies make a dozen or so belly landings every day.


Originally Posted by IcePack
Mm! No spoilers even after full touch down.

No WOW detection for reasons obvious for everyone who has seen the video(s). The aeroplane stopped just fine without them.

skit_uk 1st Nov 2011 23:18

Regarding no spoiler deployment, on the last video you can see spoilers deploying briefly on the port wing but it would seem only as part of the roll control. I guess if they dumped the lift straight after touchdown that would lead to a lot more friction on the runway at high speed and possible less response from the rudder.

(I'm not a professional pilot yet. Unless someone wants to give me my first job :ugh:)

Out Of Trim 1st Nov 2011 23:19


Mm! No spoilers even after full touch down.
Well, think about it! :ugh:

No wheels on runway... So no weight on wheels switch could be triggered!

mikeepbc 1st Nov 2011 23:32

mnez,

so they had to wait 5 hours standing in the corridor just in front of immigration because border guard won't let them in without papers - as one of them reported.
A passenger of this flight I had an opportunity to talk with said they have been invited to Presidential/Senator lounges.

repariit 1st Nov 2011 23:46

767 ALT Gear Extension employs electric unlock of MG Doors and Nose gear.

Here is an "on jacks" test of 767 ALT Gear Extension that failed:

The subject case appears to have never released the locks if reports of "no hydraulics" are true.

aviatorhi 1st Nov 2011 23:49

Job well done on the landing... one thing strikes me as curious though...

I'm not 767 rated so the following is probably incorrect, just want to ask it anyway.

Even if the gear uplocks themselves would not release wouldn't the MLG doors open? But without HYD C they would be unable to close them. Is this correct?

Joshilini 1st Nov 2011 23:52


Originally Posted by captplaystation (Post 6784414)
When, 22 years ago, I started flying 737's, I was told ( & how many times subsequently forgot ? ? ? :rolleyes:) whatever, WHATEVER the problem, check the circuit breakers, then, you, or the first officer, get out the seat, slide it forward, & check again, because many, many , faults can be fixed in 1 second by resetting a tripped circuit breaker.

As I retire for the evening, my fondest wish , for Polish colleagues, is simply that the system that controls the releasing of the up-locks, has not "malfunctioned" by the simple expedient of requiring that someone reset a circuit breaker.
This being the case, I understand, whole-heartedly the mistake, & can also predict (accurately) the outcome of the court of enquiry.

Hoping it is nothing of the sort, & that the guys involved are going to bed sometime later tonight I imagine,"well rested " :zzz: after combatting the effects of dehydration following a long transatantic flight. :D

Edited to say, the CB's on a 737 are hidden, in every nook & cranny possible, but principally behind where you sit,the 757 (& I guess 767? ) appears to present most of them right above your skull, so,my paranoid scenario is much less likely I guess/hope.

I am very confident that the crew not only would have consulted the QRH for such failures (which would most likely tell them about a tripped CB) but also got in contact with the maintenance and operations department of the airline, who would have most definitely gone through step by step every possible scenario which would have caused a malfunction of the ALTN GEAR system.

It would be completely stupid if the crew noticed the failure of the central hydraulic system and ALTN GEAR system and thought "oh, erm, no point trying to troubleshoot up here. Let's land and then the investigation will take care of it."

They had 8 hours to troubleshoot everything to do with the central hydraulic system failure and another hour (?) to troubleshoot the ALTN GEAR failure.

The Dominican 1st Nov 2011 23:54


Mm! No spoilers even after full touch down.
Of course not, it amazes me that people are even asking this question. Besides, enough drag/ friction coefficient for stopping distance not to be a concern

Passenger 389 2nd Nov 2011 00:05


"There's nothing extraordinary about it. Any commercial pilot is capable of it."
With all respect, you might want to rephrase that to "Any commercial pilot should be capable of it." Over the years, a substantial number of threads on this forum have been devoted to situations a commercial pilot seemingly should have been able to handle safely, yet somehow didn't. At least not on that particular day.

misd-agin 2nd Nov 2011 00:14

I'm amazed at the responses to the comments about no spoilers after touchdown.

WOW? Who cares, pull the speedbrake handle. It doesn't require WOW activation.


All times are GMT. The time now is 07:08.


Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.