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Search: Posts Made By: DaveReidUK
Showing results 1 to 35 of 97
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Forum: Rumours & News
6th Dec 2018, 19:30
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Or, come to that (with 20/20 hindsight), simply...

Or, come to that (with 20/20 hindsight), simply grabbing and holding the trim wheel.

N.B. No criticism of the crew intended.
Forum: Rumours & News
5th Dec 2018, 18:40
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Provided that, at 0.27 degrees per second, it is...

Provided that, at 0.27 degrees per second, it is allowed to run uninterrupted for a tad over 9 seconds.
Forum: Rumours & News
3rd Dec 2018, 20:13
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

[/QUOTE] Lion Air has nowhere close to 197...

[/QUOTE]

Lion Air has nowhere close to 197 Boeings in its current fleet.
Forum: Rumours & News
2nd Dec 2018, 09:39
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

At the risk of stating the obvious, all the time...

At the risk of stating the obvious, all the time it wasn't flying (and we know how many hours that was), it would have been on the ground. :O
Forum: Rumours & News
2nd Dec 2018, 00:34
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Do you have any evidence for either of those...

Do you have any evidence for either of those statements, given that we haven't seen any FDR traces prior to the sensor replacement ?
Forum: Rumours & News
1st Dec 2018, 16:24
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Reuters: Optional warning light could have aided...

Reuters: Optional warning light could have aided Lion Air engineers before crash...
Forum: Rumours & News
30th Nov 2018, 06:22
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Yes, hence the bit from my post that you missed...

Yes, hence the bit from my post that you missed out in your quote:
Forum: Rumours & News
29th Nov 2018, 22:28
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

No translation involved - it's a direct quote...

No translation involved - it's a direct quote from the tech log (written in English).
Forum: Rumours & News
29th Nov 2018, 15:50
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

The Preliminary Report, although it reproduces...

The Preliminary Report, although it reproduces Lion Air's Safety Instruction (Appendix 5.2) which explicitly refers to "one Engineer on board", also makes it clear that he/she was included in the 181...
Forum: Rumours & News
29th Nov 2018, 08:07
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Hmmm, did Avherald seriously expect the FAA to...

Hmmm, did Avherald seriously expect the FAA to complete a questionnaire at this stage of the proceedings?

While a few of those questions are ones that have been asked, quite reasonably, in these...
Forum: Rumours & News
28th Nov 2018, 22:12
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Bear in mind that the scale on that Pitch Trim...

Bear in mind that the scale on that Pitch Trim Position trace, though not labelled, is graduated in degree (unit) and half-degree increments from 0° to 7°.

We're told in a previous post that a...
Forum: Rumours & News
28th Nov 2018, 13:10
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

It's probably worth pointing out that in between...

It's probably worth pointing out that in between the first (Tianjin-Manado) and second (Denpasar-Manado) flights whose logs are reproduced in the report, the aircraft actually flew three additional...
Forum: Rumours & News
28th Nov 2018, 11:27
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

There's no explicit mention of the flying spanner...

There's no explicit mention of the flying spanner in the Preliminary Report, suggesting that he/she was not on the flight in any kind of pre-assigned troubleshooting role.
Forum: Rumours & News
24th Nov 2018, 21:54
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Ah, OK. I'd assumed it was a question...

Ah, OK. I'd assumed it was a question specifically about the Lion Air aircraft rather than a general one.

If the latter, I don't know the answer - you might be better asking in the Tech Log...
Forum: Rumours & News
24th Nov 2018, 19:11
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Or (and my money is still on this one), it was...

Or (and my money is still on this one), it was perfectly serviceable and working as intended (in the sense of responding correctly to the inputs from the STS/MCAS).

Occam's Razor...
Forum: Rumours & News
24th Nov 2018, 18:33
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Correct, except that there is also a gearbox in...

Correct, except that there is also a gearbox in the loop, which takes the mechanical inputs from the cable drum and the electric actuator and produces rotation of the jackscrew:
...
Forum: Rumours & News
24th Nov 2018, 16:17
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

The consensus appears to be Lion Air did not have...

The consensus appears to be Lion Air did not have the (optional) AoA display on the PFD.



The sequence of events was the other way round - the FDR trace that was released for the flight...
Forum: Rumours & News
23rd Nov 2018, 21:15
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

You change the whole unit (pictured here) - the...

You change the whole unit (pictured here) - the ramp is not the place to start taking it apart.

https://www.youtube.com/watch?v=waYos1ftm98&t=40

Eight screws, gasket, two electrical connectors,...
Forum: Rumours & News
23rd Nov 2018, 18:50
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Your inference is indeed correct. This report...

Your inference is indeed correct. This report (http://en.tempo.co/read/news/2018/11/06/056923176/KNKT-Lion-Air-Airspeed-Indicator-Damaged-since-3-Flights-Before) of the Nov 5th press briefing quotes...
Forum: Rumours & News
23rd Nov 2018, 18:16
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Maybe it can, maybe it can't (my money would be...

Maybe it can, maybe it can't (my money would be on not).

But either way - what is the relevance?

Given the overwhelming evidence implicating the STS/MCAS, why are we throwing Occam's Razor out...
Forum: Rumours & News
23rd Nov 2018, 15:58
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

IIRC, the NTSC stated that there had been four...

IIRC, the NTSC stated that there had been four previous (not necessarily consecutive) flights during which similar problems had been encountered, and that at some stage during that sequence the AoA...
Forum: Rumours & News
23rd Nov 2018, 06:50
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Charts extracted direct from the PDF, probably...

Charts extracted direct from the PDF, probably the best resolution we're going to get (sorry for the size, mods).

Bottom chart is the previous DPS-CGK flight.:...
Forum: Rumours & News
22nd Nov 2018, 17:50
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

The manual pitch trim on the 737 is a 100%...

The manual pitch trim on the 737 is a 100% conventional cable-and-drum arrangement that Lindbergh would probably recognise. I'm struggling to think of any possible failure mode that would result in...
Forum: Rumours & News
22nd Nov 2018, 15:45
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

There have been a number of 707/720 accidents...

There have been a number of 707/720 accidents where the THS has been implicated, including a fractured jackscrew, a stalled actuator and a trim motor failure, but I'm not aware of any that involved a...
Forum: Rumours & News
22nd Nov 2018, 15:03
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Correct me if I'm wrong, but the coarser the...

Correct me if I'm wrong, but the coarser the thread pitch (all other things being equal), the more likely a jackscrew is to be back driveable (the spiral ratchet screwdriver principle). Is that what...
Forum: Rumours & News
22nd Nov 2018, 06:31
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Horizontal stabilizer span: -100/200: 36' 0" ...

Horizontal stabilizer span:
-100/200: 36' 0"
-300/400/500: 41' 8"
-600/700/800/900: 47' 1"
-7/8/9 (Max): 47' 1"
Forum: Rumours & News
20th Nov 2018, 20:08
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

That's a rather sweeping assumption. Parts of...

That's a rather sweeping assumption. Parts of "the industry" may well share that view, other parts clearly don't (yet). The jury is still out.
Forum: Rumours & News
20th Nov 2018, 15:40
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

It's not about the technical feasibility. ...

It's not about the technical feasibility.

It's about the two questions: Who pays? and Who benefits?

I'd suggest that the answers to those two questions differ significantly depending on whether...
Forum: Rumours & News
20th Nov 2018, 14:12
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

There was very little clamour for real-time...

There was very little clamour for real-time streaming of FDR/CVR data prior to those events.

Hindsight is a wonderful thing.
Forum: Rumours & News
20th Nov 2018, 11:09
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

It's clearly not beneath just 30m of water, but...

It's clearly not beneath just 30m of water, but also under an indeterminate depth of sea bed. What do you think they should be doing that they aren't ?
Forum: Rumours & News
18th Nov 2018, 06:46
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

While that's true of Boeings, Airbus aircraft -...

While that's true of Boeings, Airbus aircraft - both narrow- and wide-body - typically have 3 AoA sensors, one on the port side nose and two on the starboard.
Forum: Rumours & News
17th Nov 2018, 06:51
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Just to clarify for the benefit of non-US...

Just to clarify for the benefit of non-US readers, US airworthiness regulations are contained in one of the 50 titles of the US Code of Federal Regulations (specifically Title 14, usually referred to...
Forum: Rumours & News
15th Nov 2018, 07:54
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Accident investigation protocol says that only...

Accident investigation protocol says that only the lead investigating authority (here the NTSC/KNKT) will release data such as FDR/CVR recordings, if deemed appropriate.

The US NTSB (not FAA),...
Forum: Rumours & News
15th Nov 2018, 06:28
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

Sorry, senior moment, I've edited my original...

Sorry, senior moment, I've edited my original post to show the correct (A16WE) TC number.
Forum: Rumours & News
14th Nov 2018, 19:16
Replies: 2,099
Views: 1,471,798
Posted By DaveReidUK

The 737 MAX 8 was certificated (as the "737-8")...

The 737 MAX 8 was certificated (as the "737-8") in Revision 58 of the Boeing 737 Type Certificate (A16WE) on 8th March 2017.

While there are indeed a handful of STCs (16 in fact) that are...
Showing results 1 to 35 of 97
 
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