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Search: Posts Made By: AeroTech
Showing results 1 to 35 of 179
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Forum: Rumours & News
17th Mar 2024, 18:11
Replies: 704
Views: 195,850
Posted By AeroTech

I think Boeing know who did this based on the...

I think Boeing know who did this based on the statement of the whistleblower (throwawayboeingN704AL) in this link:...
Forum: Rumours & News
29th Apr 2023, 19:59
Replies: 283
Views: 126,170
Posted By AeroTech

Mech Engr e Boeing had history of bad ethics...

Mech Engr e

Boeing had history of bad ethics after the merger with McDonnell Douglas. This merger was bad for Boeing. Certain persons tarnished Boeing reputation and they are still destroying...
Forum: Engineers & Technicians
7th Sep 2020, 23:19
Replies: 3
Views: 951
Posted By AeroTech

Safety Hazards In/Around Aircraft

As you know working on and around airplane in hangar or flight line can present safety hazards. I am not talking about safety hazard caused by vehicles and equipment around aircraft in the ramp or in...
Forum: Tech Log
16th Feb 2019, 19:12
Replies: 8
Views: 3,158
Posted By AeroTech

If the 777X and 737 MAX are fitted with bleedless...

If the 777X and 737 MAX are fitted with bleedless engines, this will require a lot of changes at least:
The ECS (environmental control system) will change which may cause the change of AC bay---->...
Forum: Tech Log
6th Jan 2019, 05:20
Replies: 0
Views: 1,109
Posted By AeroTech

Compressor wash and carbon deposit

Hi,

Hi,



a) how do you clean the fuel nozzles from carbon deposits? using regular compressor wash, in engine shop (combustor casing removed), through spark plug holes, or connecting the...
Forum: Tech Log
28th Jan 2018, 11:34
Replies: 17
Views: 6,576
Posted By AeroTech

Hi, It was a flight test, so I assume...

Hi,



It was a flight test, so I assume ballast tanks (filled with water) were installed to simulate passengers weight and cargo load. I don't know about the fuel weight. With that being said...
Forum: Tech Log
14th Jan 2018, 15:47
Replies: 7
Views: 4,457
Posted By AeroTech

Thanks for the feedback. tdracer wrote: ...

Thanks for the feedback.

tdracer wrote:


Both Boeing and Airbus use the EDP solenoid valve to pressurize or depressurize the hydraulic system. On recent aircraft Airbus use the clutch as...
Forum: Tech Log
10th Jan 2018, 16:53
Replies: 7
Views: 4,457
Posted By AeroTech

Thanks the feedback. spannersatcx, very...

Thanks the feedback.

spannersatcx, very informative post.

a) Can the pilot disconnect in flight the EDP from the engine gearbox? If so is it the guarded switch in the Overhead panel? Please...
Forum: Tech Log
7th Jan 2018, 17:57
Replies: 7
Views: 4,457
Posted By AeroTech

A350 EDP clutch

Hi,

http://www.smartcockpit.com/docs/a350-9 ... pilots.pdf

In the link above (ATA 29, page 29.3), it is said that "The Hydraulic System Monitoring Unit (HSMU) monitors EDP clutch".

I never...
Forum: Tech Log
6th Jun 2016, 04:12
Replies: 22
Views: 22,540
Posted By AeroTech

Bowed rotor

Hi,

I have few questions regarding bowed rotor on PW 1100 engine. If I am not mistaken this problem was discovered after the engine was certified.

a) Why PW didn't discover this problem...
Forum: Tech Log
2nd Oct 2015, 00:37
Replies: 23
Views: 8,170
Posted By AeroTech

Hi, As we know there are...

Hi,





As we know there are brakes, thrust reversers, and speedbrakes to stop the plane. But before that we can still shut off the fuel by the spar fuel shut off valve and HPSOV using the...
Forum: Tech Log
8th Sep 2015, 01:44
Replies: 33
Views: 19,311
Posted By AeroTech

Hi, Rigpiggy, What I understand from...

Hi,

Rigpiggy,


What I understand from your post is that the captain used both bottles after the ground crew informed you about the engine fire. If this is true, then you had engine tailpipe...
Forum: Tech Log
4th Sep 2015, 01:46
Replies: 19
Views: 6,497
Posted By AeroTech

Hi, Turbine D, Can you please talk about...

Hi,

Turbine D,
Can you please talk about these air particle filters (mentioned in your post) in the engine for turbine blades cooling.

Feedback appreciated.
Regards
Forum: Tech Log
1st Aug 2015, 16:53
Replies: 42
Views: 13,549
Posted By AeroTech

Hi, Mack E Avilli, can you explain exactly...

Hi,

Mack E Avilli, can you explain exactly what Capts Haynes and Sullenberger & the skippers of Gimli gliders and the topless B737 did beyond QRH to save lives?

Are there examples of pilots who...
Forum: Tech Log
21st May 2015, 01:04
Replies: 51
Views: 36,460
Posted By AeroTech

Hi, If the engines are not fed by the same...

Hi,

If the engines are not fed by the same fuel tank is a requirement for certification (according to Airbus reply), it will be nice if someone can post this requirement/regulation (EASA or FAA)....
Forum: Tech Log
1st Feb 2015, 16:11
Replies: 12
Views: 6,074
Posted By AeroTech

LEVEL600, thank you. How the EDP is cooled...

LEVEL600, thank you.

How the EDP is cooled in A320? I mean case drain of EDP.

It will be nice if you can post schematic(s) (from AMM or schematics manual) of A320 hydraulic system.

Another...
Forum: Tech Log
1st Feb 2015, 08:31
Replies: 12
Views: 6,074
Posted By AeroTech

Hi, I am not familiar with...

Hi,






I am not familiar with A320. Can you please explain "exhaust cooling air"?

Is it related to pressurization of hydraulic reservoir?
Forum: Tech Log
4th Jan 2015, 20:02
Replies: 37
Views: 10,345
Posted By AeroTech

Hi, Thanks for the feedback. How often...

Hi,

Thanks for the feedback.

How often the takeoff thrust is reduced below climb thrust? Does it apply to short/medium haul, long-haul (2 and 4 engine aircraft)?



About "10%" statement,...
Forum: Tech Log
26th Dec 2014, 06:34
Replies: 37
Views: 10,345
Posted By AeroTech

Hi, I don't agree with your...

Hi,





I don't agree with your opinion. I don't think the engine wear is miniscule if the max rated thrust is decreased about 10%. When you reduce the max rated thrust 25% or 40%...
Forum: Tech Log
23rd Nov 2014, 19:49
Replies: 8
Views: 5,396
Posted By AeroTech

QRH: avoid icing conditions

Hi,

I was reading 737 QRH (online document) and I found this statement "Avoid icing conditions" for certain cases such wing-body overheat or bleed trip off.

First I want to say I am not pilot...
Forum: Tech Log
5th Sep 2014, 03:37
Replies: 8
Views: 4,754
Posted By AeroTech

LP turbine stages: Leap 1A vs PW1000G

Hi,

Leap 1A (A320neo) is fitted with 7 LP turbine stages. PW1000G (A320neo) is fitted with 3 LP turbine stages.

Why such difference for LP turbine stages?

Feedback appreciated.
Forum: Engineers & Technicians
8th Apr 2014, 01:40
Replies: 7
Views: 4,991
Posted By AeroTech

In order to open the link, Copy & Past the link...

In order to open the link, Copy & Past the link and try to open it in a "New window" or page. The link is still working if you do it this way.

Here the link: ...
Forum: Engineers & Technicians
30th Mar 2014, 20:37
Replies: 7
Views: 4,991
Posted By AeroTech

Hi, I have some questions regarding the pic...

Hi,

I have some questions regarding the pic on the following link:
http://www.flickr.com/photos/flightb...348102892/in/set-72157623280980561

a) The rain gutter above the cargo door seems...
Forum: Engineers & Technicians
21st Mar 2014, 00:36
Replies: 7
Views: 4,991
Posted By AeroTech

RAIN GUTTERS ON AIRCRAFT

Hi,

a) Are the rain gutters (metal strips above aircraft doors) on aircraft efficient in deflecting rain water. I am talking here about airliners (Boeing, Airbus,...etc.). I mean by efficiency:...
Forum: Engineers & Technicians
15th Sep 2013, 20:23
Replies: 4
Views: 2,433
Posted By AeroTech

Leak Check (Air, Hydraulic, Oil, And Fuel)

Hi,

If I am not mistaken dry motoring drives N2/N3 to around 20%-25% N2/N3. I am assuming N1 will be driven at very low speed: may be 1% or 3% N1 ???

a) When performing leak check using dry...
Forum: Tech Log
2nd Sep 2013, 17:23
Replies: 36
Views: 10,129
Posted By AeroTech

Thank you for your feedback. I agree that...

Thank you for your feedback.

I agree that closing the throttle(s) will reduce the asymmetry, but I think it will not bring back the airplane to the centerline of the runway especially if an...
Forum: Tech Log
31st Aug 2013, 20:19
Replies: 36
Views: 10,129
Posted By AeroTech

Thrust asymmetry

Hi,

I read somewhere that using NW steering is not efficient in case of thrust asymmetry after engine failure especially after certain speed and below Vmcg.

a) Is the statement above true?
...
Forum: Engineers & Technicians
2nd Jul 2013, 22:33
Replies: 8
Views: 6,667
Posted By AeroTech

APU fuel drain mast

Hi,

I posted the following questions on Tech Log. So far I didn't receive any answer. I hope Engineers & Technicians of this forum will answer my questions.




This is an excerpt from this...
Forum: Tech Log
1st Jul 2013, 23:08
Replies: 0
Views: 2,760
Posted By AeroTech

APu fuel drain mast

Hi,



This is an excerpt from this link: The 737 APU (http://www.b737.org.uk/apu.htm)

a) I am wondering if this excerpt is valid for the B737 NG, the classic, or both?

b) If the B737 NG is...
Forum: Tech Log
19th May 2013, 22:08
Replies: 9
Views: 4,228
Posted By AeroTech

Vacuum Waste system Vs Recirculating

Hi,

Modern aircraft are fitted with vacuum waste system at the opposite of old aircraft that are fitted with recirculating waste system.

a) What are advantages and the disadvantages of vacuum...
Forum: Tech Log
3rd Sep 2012, 02:18
Replies: 19
Views: 12,304
Posted By AeroTech

Hi, It seems that weight flex is a...

Hi,



It seems that weight flex is a smart way to reduce navigation charges especially for aircraft operator with huge fleet of short-haul aircraft. I am wondering if the landing charges is...
Forum: Tech Log
28th May 2012, 17:56
Replies: 25
Views: 12,789
Posted By AeroTech

Thank you for your feedback. a) On what...

Thank you for your feedback.

a) On what speed the landing performance computation is based on?
On Vref (Vref+5/-0, Vref+20/15 …etc?) or on touchdown speed?
Extra speed (due to wind additives) +...
Forum: Tech Log
22nd May 2012, 03:07
Replies: 25
Views: 12,789
Posted By AeroTech

Thank you for your feedback. Factoring...

Thank you for your feedback.

Factoring landing distance didn’t prevent the occurrence of overrun so far. Wind additives might be a possible cause of overrun (among other causes of overrun). It...
Forum: Tech Log
19th May 2012, 19:19
Replies: 25
Views: 12,789
Posted By AeroTech

WIND ADDITIVES AND LANDIND SPEED

Hi,

a) Why you add wind additives such headwind and gust to Vref?

b) Why you don’t subtract/add wind additives such tailwind and crosswind to Vref?

It seems Boeing recommends bleeding off...
Forum: Tech Log
6th May 2012, 18:13
Replies: 0
Views: 891
Posted By AeroTech

Regular descent vs steep descent

Hi,

a) What are the advantages and the disadvantages of these 2 descents?

b) Is the angle of regular descent 3 degree (same as in approach)?

c) What’s the angle of steep descent? Is there a...
Showing results 1 to 35 of 179
 
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