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10th Sep 2020, 16:56
Replies: 62
Views: 33,788
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...
7th Sep 2020, 13:35
Replies: 62
Views: 33,788
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).
7th Sep 2020, 08:11
Replies: 513
Views: 204,890
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...
7th Sep 2020, 08:06
Replies: 1,657
Views: 2,646,013
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)
28th Aug 2020, 10:44
Replies: 62
Views: 33,788
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...
31st Jan 2020, 19:09
Replies: 93
Views: 52,366
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.
14th Jan 2020, 15:39
Replies: 379
Views: 149,815
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...
10th Jan 2020, 11:45
Replies: 379
Views: 149,815
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...
17th Dec 2019, 11:52
Replies: 288
Views: 324,823
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...
19th Nov 2019, 18:53
Replies: 4,656
Views: 4,290,846
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...
12th Nov 2019, 07:32
Replies: 4,656
Views: 4,290,846
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...
7th Nov 2019, 16:43
Replies: 4,656
Views: 4,290,846
Posted By fgrieu

In the news today

Boeing states that FAA(*) and EASA found documentation of 737 MAX software changes insufficient.
Source: CNBC article...
5th Nov 2019, 16:05
Replies: 4,656
Views: 4,290,846
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,...
30th Oct 2019, 09:06
Replies: 4,656
Views: 4,290,846
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...
11th Oct 2019, 18:34
Replies: 4,656
Views: 4,290,846
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...
6th Sep 2019, 17:14
Replies: 4,656
Views: 4,290,846
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...
19th Aug 2019, 15:03
Replies: 4,656
Views: 4,290,846
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...
2nd Jul 2019, 12:22
Replies: 63
Views: 64,765
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...
19th May 2019, 20:11
Replies: 107
Views: 101,322
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...
19th May 2019, 11:29
Replies: 191
Views: 120,721
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...
17th May 2019, 16:53
Replies: 66
Views: 49,909
Posted By fgrieu

Looks like the stepper motor for the analog hands...

Looks like the stepper motor for the analog hands looses steps. The strong magnetic field theory would make some sense if there was such a source, but I can think of none. If the watch it still...
16th May 2019, 11:10
Replies: 5
Views: 7,218
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...
15th May 2019, 06:08
Replies: 82
Views: 87,189
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!
9th Apr 2019, 07:14
Replies: 5,120
Views: 10,506,452
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 ?
5th Apr 2019, 12:26
Replies: 5,120
Views: 10,506,452
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)...
Showing results 1 to 25 of 56
 


 
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