PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Search
Today's Posts
Mark Forums Read
Vendor Directory
 
Page 1 of 2
1
2
Search: Posts Made By: fgrieu
Showing results 1 to 35 of 61
Search took 0.01 seconds.
Forum: Accidents and Close Calls
15th Feb 2024, 07:35
Replies: 1,950
Views: 924,914
Posted By fgrieu

Reason for discrepancy of door marking?

The NTSB preliminary report (https://www.ntsb.gov/investigations/Documents/DCA24MA063%20Preliminary%20report.pdf) states

while (as reported earlier in this thread...
Forum: Accidents and Close Calls
24th Jan 2024, 07:31
Replies: 1,950
Views: 924,914
Posted By fgrieu

Don't loose bolts happen all the time ?

We know with good confidence that the door plug's four locking bolts where not present at time of the accident, because the structural elements holding the door are essentially intact, and would not...
Forum: Accidents and Close Calls
18th Jan 2024, 11:25
Replies: 1,950
Views: 924,914
Posted By fgrieu

As pointed in this post...

As pointed in this post (https://www.pprune.org/accidents-close-calls/656760-alaska-airlines-737-900-max-loses-door-flight-out-pdx.html#post11577028), it can be seen an inscription "LINE UNIT : 8799"...
Forum: Accidents and Close Calls
16th Jan 2024, 12:44
Replies: 1,950
Views: 924,914
Posted By fgrieu

That's AFAIK a new observation, and it could be...

That's AFAIK a new observation, and it could be significant.
Can you source the information that LN 8799 is N705AL, rather than N704AL, e.g. by telling from what the second picture is a screen...
Forum: Rumours & News
14th Jan 2021, 19:46
Replies: 871
Views: 962,605
Posted By fgrieu

Old electronics guy Any reference on that...

Old electronics guy

Any reference on that stunt, and the physics behind it?
Forum: Rumours & News
15th Dec 2020, 15:36
Replies: 156
Views: 115,847
Posted By fgrieu

It seems more defects in the same vein have...

It seems more defects in the same vein have surfaced. Quoting the Seatle Times (https://www.seattletimes.com/business/boeing-aerospace/boeing-finds-more-787-quality-defects-broadens-inspections/)...
Forum: Rumours & News
10th Sep 2020, 15:56
Replies: 156
Views: 115,847
Posted By fgrieu

And now several...

And now several (https://theprint.in/economy/almost-entire-boeing-787-dreamliner-fleet-under-scrutiny-now-for-defect-in-tail-wing/498720/) reports...
Forum: Rumours & News
7th Sep 2020, 12:35
Replies: 156
Views: 115,847
Posted By fgrieu

A relevant aviationweek article...

A relevant aviationweek article (https://aviationweek.com/air-transport/safety-ops-regulation/new-787-problems-spotlight-boeings-quality-issues?elq2=adc91fbbf2fa453c988dcedb9065e3aa).
Forum: Rumours & News
7th Sep 2020, 07:11
Replies: 1,128
Views: 474,098
Posted By fgrieu

Synthetic airspeed/AoA for the 737 MAX? ...

Synthetic airspeed/AoA for the 737 MAX?

According to this (https://www.fliegerfaust.com/boeing-737-max-2647475121.html) and this (https://www.fliegerfaust.com/boeing-737-max-2647475182.html) (both...
Forum: Rumours & News
7th Sep 2020, 07:06
Replies: 1,744
Views: 3,047,234
Posted By fgrieu

KAL Line Operations Safety Audit...

KAL Line Operations Safety Audit (http://www.flight.org/downloads/pdf/korean_airlines_safety_audit_report.pdf#page=2)
Forum: Rumours & News
28th Aug 2020, 09:44
Replies: 156
Views: 115,847
Posted By fgrieu

Eight B787 pulled from service over structural issues

According to this article (https://theaircurrent.com/aviation-safety/boeing-pulls-eight-787s-from-service-over-structural-issue/) , Boeing identified manufacturing defects in eight B787 and asked the...
Forum: Rumours & News
31st Jan 2020, 18:09
Replies: 92
Views: 64,898
Posted By fgrieu

A vulnerability of the throttle lever to coffee...

A vulnerability of the throttle lever to coffee spill would be a perfect case of SPoF for both engines.
Forum: Rumours & News
14th Jan 2020, 14:39
Replies: 378
Views: 193,189
Posted By fgrieu

The text in the actual transcript...

The text in the actual transcript (http://fgrieu.free.fr/Boeing-Employee-Emails-re-Boeing-737-Max-Simulator-all3-OCR.pdf#page=103) of the chat circa Feb 2, 2018 (never believe the press blindly, try...
Forum: Rumours & News
10th Jan 2020, 10:45
Replies: 378
Views: 193,189
Posted By fgrieu

Here...

Here (http://fgrieu.free.fr/Boeing-Employee-Emails-re-Boeing-737-Max-Simulator-all3-OCR.pdf) are the 117 pages of Boeing internal communications, in their public (redacted) form, with OCR to...
Forum: Rumours & News
17th Dec 2019, 10:52
Replies: 288
Views: 357,293
Posted By fgrieu

MAX’s Return Delayed by FAA Reevaluation of 737 Safety Procedures Mk II

It is not clear (to me at least) how exactly the modified FC software (including tamed MCAS) can allow re-certification.

1) The original certification was heavily based on "grandfather rights" (an...
Forum: Rumours & News
19th Nov 2019, 17:53
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

Or a demonstration that manual trim is operable...

Or a demonstration that manual trim is operable by the pilot(s) in all parts of the flight envelope that can reasonably be reached.
Or that the risk of an un-contained fan failure sending shrapnel...
Forum: Rumours & News
12th Nov 2019, 06:32
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

Or maybe the issue is that some sizable fraction...

Or maybe the issue is that some sizable fraction of pilots need training on manual trimming, and its quirks in some portions of the flight envelope + trim setting, including high speed with heavy...
Forum: Rumours & News
7th Nov 2019, 15:43
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

In the news today

Boeing states that FAA(*) and EASA found documentation of 737 MAX software changes insufficient.
Source: CNBC article...
Forum: Rumours & News
5th Nov 2019, 15:05
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

Nice article. Too bad the issue of the excessive...

Nice article. Too bad the issue of the excessive effort to manually rotate the trim wheel in certain portions of the flight envelope was not raised. That might get in the way of lifting the ban,...
Forum: Rumours & News
30th Oct 2019, 08:06
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

In the press today

The chairman of the House Transportation and Infrastructure Committee is quoted by the LA Times (https://www.latimes.com/business/story/2019-10-29/senators-grill-boeing-ceo-737-max-crashes) as...
Forum: Rumours & News
11th Oct 2019, 17:34
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

JATR report

Here is the JATR report (https://www.faa.gov/news/media/attachments/Final_JATR_Submittal_to_FAA_Oct_2019.pdf) of Oct 11, 2019 as posted on the FAA website...
Forum: Rumours & News
6th Sep 2019, 16:14
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

From a presentation...

From a presentation (http://europarl.europa.eu/cmsdata/186500/20190903_EASA_Ky-original.pdf#page=14) of 2019-09-03 by EASA's Executive Director Patrick KY, as posted on the European Parliament's...
Forum: Rumours & News
19th Aug 2019, 14:03
Replies: 4,656
Views: 4,778,923
Posted By fgrieu

How can "the potential difficulty of pilots in rotating the MAX trim wheel" be fixed?

Reportedly (https://www.wingsoverquebec.com/?p=8663), number 1 of 5 concerns raised by EASA about the 737 MAX is:
"The potential difficulty of pilots in rotating the MAX trim wheel".
What are the...
Forum: Rumours & News
2nd Jul 2019, 11:22
Replies: 63
Views: 70,821
Posted By fgrieu

A380 engine piece found in Groenland after 21 months

A 150 kg piece of the A380 engine 4 that experienced an uncontained engine failure over Groenland on 2017-09-30 was recovered under 4m of ice.
flightglobal's article...
Forum: Rumours & News
19th May 2019, 19:11
Replies: 104
Views: 109,603
Posted By fgrieu

What substantiates too easy ? The only source I...

What substantiates too easy ? The only source I know is Boeing's statement (https://www.afp.com/en/news/15/boeing-acknowledges-flaw-737-max-simulator-software-doc-1gm9761) "changes will improve the...
Forum: Rumours & News
19th May 2019, 10:29
Replies: 191
Views: 145,828
Posted By fgrieu

737 Max simulator revised for better simulation of manual trim

On 2019-09-15, AFP quotes Boeing (https://www.afp.com/en/news/15/boeing-acknowledges-flaw-737-max-simulator-software-doc-1gm9761) as stating:




Do we have an authoritative source on if the...
Forum: Rumours & News
16th May 2019, 10:10
Replies: 5
Views: 7,362
Posted By fgrieu

No, if we trust the quote in the first post...

No, if we trust the quote in the first post (https://www.pprune.org/rumours-news/621580-note-april-5th-additional-software-problem-found-boeing-737-max-control-system.html#post10472226), also found...
Forum: Rumours & News
15th May 2019, 05:08
Replies: 82
Views: 95,793
Posted By fgrieu

From that NYT article (emphasis mine): Part...

From that NYT article (emphasis mine):

Part of him already knew that betting safety on that assumption was dubious!
Forum: Rumours & News
9th Apr 2019, 06:14
Replies: 5,109
Views: 13,071,372
Posted By fgrieu

Is that sure ? Can the electric trim work despite...

Is that sure ? Can the electric trim work despite aerodynamic forces in all situations (overspeed, trim full nose down) ? Does it even work in more situations than manual trim ?
Forum: Rumours & News
5th Apr 2019, 11:26
Replies: 5,109
Views: 13,071,372
Posted By fgrieu

Preliminary report, pristine quality

For reference
- preliminary report on EA302 (https://games-cdn.washingtonpost.com/notes/prod/default/documents/6375a995-4d9f-4543-bc1e-12666dfe2869/note/4cb6f748-a0c0-45c2-bf0b-f672ba3cfebe.pdf)...
Forum: Rumours & News
3rd Apr 2019, 21:20
Replies: 5,109
Views: 13,071,372
Posted By fgrieu

The control column trim switches are not the...

The control column trim switches are not the "cutout" switches. I'm inclined to believe [Late edit: it turns out, wrongly] that central cutout switches have authority over MCAS, but control column...
Forum: Rumours & News
3rd Apr 2019, 19:17
Replies: 5,109
Views: 13,071,372
Posted By fgrieu

MCAS authory vs column switch?

I that dead sure? Have an authoritative source?
Forum: Rumours & News
3rd Apr 2019, 06:55
Replies: 908
Views: 1,092,897
Posted By fgrieu

So according to the WSJ...

So according to the WSJ (https://www.wsj.com/articles/ethiopian-airlines-pilots-initially-followed-boeings-required-emergency-steps-to-disable-737-max-system-11554263276) (paywalled, but regurgitated...
Forum: Rumours & News
22nd Mar 2019, 08:10
Replies: 5,109
Views: 13,071,372
Posted By fgrieu

Do I get it correctly that "blowback" of the...

Do I get it correctly that "blowback" of the elevator would be a situation when the actuators for the elevator are not powerful enough to overcome the aerodynamic forces on the elevator, due to high...
Forum: Rumours & News
18th Mar 2019, 18:11
Replies: 5,109
Views: 13,071,372
Posted By fgrieu

The Seattle Times runs an article...

The Seattle Times runs an article (https://www.seattletimes.com/business/boeing-aerospace/failed-certification-faa-missed-safety-issues-in-the-737-max-system-implicated-in-the-lion-air-crash/) with...
Showing results 1 to 35 of 61
 
Page 1 of 2
1
2


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

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