Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

 
Search: Posts Made By: PEI_3721
Showing results 1 to 25 of 822
Search took 0.24 seconds.
10th Jul 2019, 12:20
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

phylosocopter, #1295 Re “code or standards...

phylosocopter, #1295
Re “code or standards around the state of display and alarms in case of AP”
There are standards in CS 25 etc and ACs, however many are interpretive and do not cover grandfather...
26th Jun 2019, 16:36
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

yoko1, # 676 The FDR printout suggests that...

yoko1, # 676

The FDR printout suggests that the electric trim was operable at that time, however there is no evidence that the tail moved - possibly too short a time scale. Thus probability enters...
14th Jun 2019, 09:03
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

fdr # 398 Yes getting close, but two related...

fdr # 398
Yes getting close, but two related issues divide our views.

First, ‘… the technique to unload the trim to gain in trim condition again is able to be taught’ assumes that there will be...
13th Jun 2019, 16:45
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

fdr, Clarifying my point, scepticism that the...

fdr,
Clarifying my point, scepticism that the Max can be flown safely, has nothing to do with MCAS.
If the trim, for whatever reason, exceeds a particular deviation then the likelihood of being...
13th Jun 2019, 11:22
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

HighWind, # 371, :ok: A clear and balanced...

HighWind, # 371, :ok:
A clear and balanced summary; I agree, although the future might not be the simple either-or alternatives.

The Max might have the simplest route. If trim does not meet the...
12th Jun 2019, 13:34
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

The gums # 346, You are correct in considering...

The gums # 346,
You are correct in considering a wider view of stability, not just aerodynamics; cg, thrust, the complete aircraft. In the purist sense stability is more precise, and certification...
11th Jun 2019, 21:27
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

Yo gums, # 342. Re Airbus certification,...

Yo gums, # 342.

Re Airbus certification, your ‘waivers and exceptions’ (#31)j. In practice these were alternative means of compliance for existing regulations, or proposals for new ‘equivalent...
11th Jun 2019, 12:19
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

petit plateau, AoA. Perhaps a slip, but it’s...

petit plateau, AoA.
Perhaps a slip, but it’s the parameter ‘AoA’, opposed to an indicator which is important in MCAS.

The certification issue appears to involve stability margin, often simplified...
8th Jun 2019, 18:25
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

Yo gums, As discussed previously, an...

Yo gums,
As discussed previously, an aerodynamic correction (‘fix’) might not be particularly easy, if at all; and / or it could affect the economics aircraft operation. Aero fix might not sell so...
1st Jun 2019, 17:52
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

Yo, gums, Why not use ‘q’ I don’t know;...

Yo, gums,
Why not use ‘q’
I don’t know; superficially speed for trim would be a logical association.
However, as much as Boeing sticks to the stability line, the aircraft’s sensitivity at low...
1st Jun 2019, 13:24
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

Bend alot, What if the difference now focuses...

Bend alot,
What if the difference now focuses on trim runway.
The NG in-service, apparently without incident. The Max grounded following two accidents which suggests that the trim runaway drill...
1st Jun 2019, 09:20
Replies: 1,466
Views: 1,091,105
Posted By PEI_3721

Delay

Bend alot, # 78

Boeing proposed a modification, 17 Apr. https://www.boeing.com/commercial/737max/737-max-software-updates.page
This was rejected by the FAA, no specific reasons given, thus Boeing...
Forum: Tech Log
30th May 2019, 08:55
Replies: 19
Views: 10,800
Posted By PEI_3721

Max Demonstrated

yoko1 #6,
‘Max demonstrated’ usually represents the maximum crosswind that the manufacturer has evaluated based on accurate and recorded wind reports, and judged not to be limiting. If higher values...
26th May 2019, 21:16
Replies: 194
Views: 108,450
Posted By PEI_3721

yanrair, # 107 You appear to have overlooked...

yanrair, # 107
You appear to have overlooked the main point; perhaps the explanation of the difference between balance and absolute force lacked clarity (# 105...
25th May 2019, 18:05
Replies: 194
Views: 108,450
Posted By PEI_3721

Loose rivets, ‘I assume there must be a good...

Loose rivets,
‘I assume there must be a good reason it's hinged at the rear.’
A logical view, but the reason probably lost in the 707 records, and a situation where today’s 737 engineers wish it...
21st May 2019, 12:16
Replies: 103
Views: 66,034
Posted By PEI_3721

wilbert33 # 58, Your summary represents the...

wilbert33 # 58,
Your summary represents the emerging understanding.
The important issue is why these aspects could have been overlooked, unknown, or unaccounted for.

The tail force-to-speed...
20th May 2019, 13:00
Replies: 103
Views: 66,034
Posted By PEI_3721

Gums et al,...

Gums et al, https://www.pprune.org/showpost.php?p=10475209&postcount=36 (https://www.pprune.org/showpost.php?p=10475209&postcount=36)
Re ‘like other 737’, stability ‘enhancement’, or anti stall.
...
13th May 2019, 15:47
Replies: 11
Views: 10,508
Posted By PEI_3721

Reply to Dave Reid UK at #9...

Reply to Dave Reid UK at #9 https://www.pprune.org/10470021-post9.html

Re ‘If it's a "fact" that electric trim can't move the stab back towards a trimmed state, either, then can we have some...
13th May 2019, 15:29
Replies: 11
Views: 10,508
Posted By PEI_3721

Reply to pattern is full, in closed thread #6...

Reply to pattern is full, in closed thread #6 https://www.pprune.org/10469987-post6.html
Re ‘With which we can compare the available trimming force available (motor power or pilot muscle).’

Pilot...
Forum: Tech Log
13th May 2019, 13:03
Replies: 2
Views: 2,006
Posted By PEI_3721

Also see 737 Trim...

Also see 737 Trim (https://www.pprune.org/rumours-news/621448-737-trim.html) ( now closed ???)

Revisit the Boeing advice on "aerodynamically relieving airloads" using manual stabilizer trim thread...
13th May 2019, 07:17
Replies: 12
Views: 5,989
Posted By PEI_3721

Because of the relevance of trim history in this...

Because of the relevance of trim history in this thread, the opening post in the tech log link is restated: - that thread will be closed if able.

FAA officials have told airline safety officials...
12th May 2019, 22:12
Replies: 12
Views: 5,989
Posted By PEI_3721

deadheader, Many aspects of your question were...

deadheader,
Many aspects of your question were considered in prior, mostly closed threads, but never pursued to a meaningful conclusion.
Reasons for this are difficult to establish; thus specific...
Forum: Tech Log
12th May 2019, 15:45
Replies: 2
Views: 2,006
Posted By PEI_3721

Evolution of 737 Runaway Trim Procedure

FAA officials have told airline safety officials and pilots unions in April 2019 that they are reviewing the Runaway Stabilizer procedure in the wake of the 737 MAX MCAS accidents.
737 Runaway...
11th May 2019, 12:51
Replies: 93
Views: 51,373
Posted By PEI_3721

737 Driver, Thanks for the info on TOGA,...

737 Driver,
Thanks for the info on TOGA, previous thread.
You overlooked my speculative ‘if’ - ‘if without MCAS could the pitch-up be excessive’.

The primary reason for two-stage TOGA was to...
11th May 2019, 12:46
Replies: 93
Views: 51,373
Posted By PEI_3721

737 Max MCAS recertification and return to service

The preceding thread on 737 Max future has been closed, presumably due to inappropriate posts - play the ball, not the person.
Closure appears to be an excessive reaction to a problem which could be...
Showing results 1 to 25 of 822
 


 
Forum Jump

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.