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Search: Posts Made By: infrequentflyer789
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Forum: Rumours & News
7th Dec 2018, 15:31
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Mmm, might want to check with respect to the NG. ...

Mmm, might want to check with respect to the NG. Maintenance manual (don't have FCOM but be interested to know what is in it on this) says:



Note: FCC / speed trim functional diagram labels...
Forum: Rumours & News
30th Nov 2018, 07:39
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

based on the bits of AMMs I (unofficially) happen...

based on the bits of AMMs I (unofficially) happen to have, the answer to that appears to be - no. Or more precisely "only some of it". Comparing drawings:
...
Forum: Rumours & News
28th Nov 2018, 15:50
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

From NG AMM, FCC BITE test would appear to...

From NG AMM, FCC BITE test would appear to set/reset the master "side", other BITE tests might do too. I don't think we can say for sure that the maintenance checks done would have reset it, but we...
Forum: Rumours & News
28th Nov 2018, 11:08
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

NTSC site seems to be down, probably overloaded,...

NTSC site seems to be down, probably overloaded, for a few hours now.

However, ASN have a copy at https://reports.aviation-safety.net/2018/20181029-0_B38M_PK-LQP_PRELIMINARY.pdf which seems to be...
Forum: Rumours & News
28th Nov 2018, 10:16
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

The way I read the diagrams, each SMYD feeds one...

The way I read the diagrams, each SMYD feeds one side stick shaker motor, but same signal from either SMYD will trigger EFSM. So the expectation would be that if stick shaker is going off, even on...
Forum: Rumours & News
24th Nov 2018, 21:03
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Sorry, I may not have been clear, the comments I...

Sorry, I may not have been clear, the comments I was to were about MCAS not honoring the aft column cutout switch - if you pull the yoke back far enough STS will stop trimming forward, MCAS won't. ...
Forum: Rumours & News
24th Nov 2018, 19:54
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

The way I (and others, see e.g....

The way I (and others, see e.g. https://www.satcom.guru/2018/11/737-mcas-failure-is-option.html ) have interpreted the published/leaked MCAS descriptions is that it will limit movement to 2.5degrees...
Forum: Rumours & News
23rd Nov 2018, 19:55
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

This is what I think too, note also that the...

This is what I think too, note also that the repeated ND automatic trim starts coincident with flaps 0 (as it does on the accident flight, so MCAS) - before that the automatic is sometimes up...
Forum: Rumours & News
23rd Nov 2018, 13:28
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

I wonder if there was a word or two lost in...

I wonder if there was a word or two lost in translation and what was meant was "after it thought it stalled". Yes, we all know the aircraft doesn't think as such, but "the aircraft thought it was...
Forum: Rumours & News
23rd Nov 2018, 13:19
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Pretty sure that something like "mess of wires"...

Pretty sure that something like "mess of wires" was what I thought on seeing an aircraft wiring loom (in construction) for the first time :) Up close of course it isn't a mess, it's all neat and...
Forum: Rumours & News
22nd Nov 2018, 11:37
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Well, someone obviously knows but it doesn't...

Well, someone obviously knows but it doesn't appear to be public domain. What we do seem to know is that there was a software mod to FCC in the NG, allegedly for EASA cert reqs. - see e.g....
Forum: Rumours & News
20th Nov 2018, 07:58
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Well, that is the sort of thing I was fishing...

Well, that is the sort of thing I was fishing for, but I don't think that's it.

I can find plenty of references that say MCAS only with flaps up, but looks like it is flaps up or down for STS...
Forum: Rumours & News
19th Nov 2018, 21:05
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

There is some more info in earlierWSJ...

There is some more info in earlierWSJ (https://www.wsj.com/articles/southwest-replaced-flight-control-sensors-of-the-kind-implicated-in-lion-air-crash-1542330689) article on it. Seems they replaced...
Forum: Rumours & News
19th Nov 2018, 12:43
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

I'm not sure if I am totally barking up the wrong...

I'm not sure if I am totally barking up the wrong tree here, but there may be another possibility to consider as well:

What happens if MCAS and STS are both active? We have no information as to...
Forum: Rumours & News
18th Nov 2018, 17:03
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

In terms of operationally, looking for...

In terms of operationally, looking for changes/differences docs I haven't seen anything that suggests STS has been removed or changed, and since MCAS wasn't documented at all...

The actual...
Forum: Rumours & News
16th Nov 2018, 09:18
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

For EASA-FAA, bilateral agreements mean that each...

For EASA-FAA, bilateral agreements mean that each basically rubber-stamps the other's approvals. They are, however, completely independent organisations and each has its own rubber stamp.
Forum: Rumours & News
15th Nov 2018, 12:18
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Sit down, relax and take a slow deep breath...

Sit down, relax and take a slow deep breath before you read on to this ...
Forum: Rumours & News
15th Nov 2018, 10:02
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Not so, 69 hours of flight data downloaded,...

Not so, 69 hours of flight data downloaded, including the accident flight, according to statement by Haryo Satmiko (NTSC). Just Google "Haryo Satmiko 69 hours" (without the quotes) and pick a news...
Forum: Rumours & News
14th Nov 2018, 13:01
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Just to clarify, I wasn't saying that I agree...

Just to clarify, I wasn't saying that I agree with the rationale either, just speculating as to how it could have come about, whilst also aware that I do so with the benefits of hindsight, and...
Forum: Rumours & News
14th Nov 2018, 11:08
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Boeing probably had pretty sound (to Boeing)...

Boeing probably had pretty sound (to Boeing) reasons for not telling anyone about MCAS, those reasons probably look like "WTF" to everyone else, but that's with the benefit of hindsight.

I would...
Forum: Rumours & News
13th Nov 2018, 20:42
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Based on an old 737 AMM and zero personal...

Based on an old 737 AMM and zero personal hands-on experience, it looks like 737 has something very similar. AMM refers to a "calibrator" which is to used in system performance test after...
Forum: Rumours & News
12th Nov 2018, 20:57
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Yes, however if you search for "Maneuvering...

Yes, however if you search for "Maneuvering Characteristics" near "Augmentation System" with the date limit you do get a result.
The actual search is (with date before 1 Nov 2018),


This...
Forum: Rumours & News
9th Nov 2018, 20:23
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

True, but comparing the original Boeing notice...

True, but comparing the original Boeing notice (see e.g. post #882) with the EAD the language seems (to me at least) to have become more unclear. The original wording on other symptoms of bad AOA is...
Forum: Rumours & News
7th Nov 2018, 22:48
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Not Denti, but I've been scratching my head on...

Not Denti, but I've been scratching my head on this too. I cannot see how AOA could be used for groundspeed except maybe possibly some kind of correction for gyro drift but then surely that's what...
Forum: Rumours & News
7th Nov 2018, 14:21
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Yes, except this...

Yes, except this (https://www.channelnewsasia.com/news/asia/indonesia-lion-air-crash-boeing-issues-advice-over-sensors-10905532) article (from further up the thread) states that the "broken" AOA...
Forum: Rumours & News
1st Nov 2018, 17:44
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Problem is that finding the vertical stabilizer...

Problem is that finding the vertical stabilizer intact and separate from the rest of the wreckage is not an indication of pre-impact separation - they are pretty strong, in a relatively protected...
Forum: Rumours & News
1st Nov 2018, 17:30
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Almost certainly, but what might be very...

Almost certainly, but what might be very interesting and useful is if that system's data was copied off the previous night and has the info from the previous days flight. Data isn't a lot of use if...
Forum: Rumours & News
1st Nov 2018, 11:07
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

What is the trend in LOC _rate_ per flight-hour...

What is the trend in LOC _rate_ per flight-hour or flight-mile?

% of accidents that are LOC is meaningless - a decrease in other causes will increase %LOC without any degradation in pilot skills. ...
Forum: Rumours & News
31st Oct 2018, 15:23
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

Hmmm... If we suppose it went in at near 90deg...

Hmmm... If we suppose it went in at near 90deg bank, how much would the uppermost wing be shielded from impact forces by the fuselage?

XL888 went down with the wings still attached (pretty sure...
Forum: Rumours & News
31st Oct 2018, 14:39
Replies: 2,099
Views: 1,471,865
Posted By infrequentflyer789

There is not really any proof that most pilots...

There is not really any proof that most pilots can't handle it today. AF447 investigation found 30+ previous similar incidents that were easily handled non-events vs. the one that wasn't handled -...
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