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13th Mar 2019, 17:50
Replies: 5,127
Views: 10,276,966
Posted By Diversification

Single signal used

I have a long experience with the safety of nuclear power reactors and their operation. We often have three requirements on a critical measured value.
1. At least three sensors should be in use and...
Forum: Rotorheads
10th Jun 2016, 10:04
Replies: 1,918
Views: 1,452,526
Posted By Diversification

SLB #1267 You are right about the bearings...

SLB #1267
You are right about the bearings being spherical. Thanks for the link to the drawing.
Forum: Rotorheads
9th Jun 2016, 21:33
Replies: 1,918
Views: 1,452,526
Posted By Diversification

Re: SLB #1251. The SKF procedure is for...

Re: SLB #1251.
The SKF procedure is for spherical rollerbearings. On normal roller bearings it seems that one flange is often pressed into place after spacers and roller are in place.
Strange that...
Forum: Rotorheads
7th Jun 2016, 05:44
Replies: 1,918
Views: 1,452,526
Posted By Diversification

Gearbox maintenance quality control

Birmingham wrote in #1213
Diversification; There is no way that a company of HS/CHC's standing operating a contract for Statoil would knowingly use old parts (unless part of a fully approved...
Forum: Rotorheads
4th Jun 2016, 17:41
Replies: 1,918
Views: 1,452,526
Posted By Diversification

Bad Parts again?

The refurbishing of the grarbox, and probably the epicyclic gears too, makes me think of old stories about bad spare parts being resold as new. The husband of by secretiry died as pilot in an...
9th Dec 2015, 16:54
Replies: 3,924
Views: 3,787,498
Posted By Diversification

Errors in cpies of the same device

Then reading the report I an struck again by the fault in identical systems without any known important diversification in either design or in manufacturing. Hence the root should be classified as a...
1st Feb 2015, 13:30
Replies: 3,924
Views: 3,787,498
Posted By Diversification

Boxes vs cabling etc

If the switching of FAC units with an other aircraft did not remove intermittent malfunctions, I should rather suspect connectors, cabling or sensor errors than FAC-unit problems.

Is the reason...
4th Aug 2012, 19:29
Replies: 1,316
Views: 323,201
Posted By Diversification

CVR filtering

Can anybody on this thread explain why BEA don't give a full record of what was on the CVR. As an example compare with the corresponding detailed record in the NTSB report on the Buffalo accident. Is...
Forum: Tech Log
10th Jul 2012, 21:55
Replies: 1,454
Views: 172,618
Posted By Diversification

Unexplained ACARS WRG msg

In one of the the preliminary reports it was hypothised that this msg was caused by an attempt of the pilots to shut down one or both of the affected computers.
"02:11:55 - .1/FLR/FR0906010210...
Forum: Tech Log
16th Apr 2012, 13:06
Replies: 1,550
Views: 202,944
Posted By Diversification

ADIRU-ND signals and software

Hi all!

After following this discussion for some years, I am still wondering about some things.
Why has BEA not released the current software versions used on the computers, e.g. ADIRU:s, Prim:s...
Forum: Tech Log
21st Dec 2011, 20:22
Replies: 1,353
Views: 202,701
Posted By Diversification

PIO:s

The SAAB company took a patent may years ago on a method to prevent PIO (after the 2 JAS 39 Gripen PIO accidents), but normally this seems to be simply done by rate-limiting in the software. I don't...
Forum: Tech Log
12th Aug 2011, 11:51
Replies: 1,998
Views: 400,363
Posted By Diversification

AoA and ADR-data

CONF iture (http://www.pprune.org/members/104576-conf-iture)
The following excerpt from the Australian interrim report has already been posted in this thread. However, I will bring your attention to...
Forum: Tech Log
1st Aug 2011, 15:23
Replies: 1,998
Views: 400,363
Posted By Diversification

Power and attitude

I have now read many statements that the correct action should have been "pitch and power" at cruise level. If this is really true can any of the knowledgeable posters explain to me why autopilot...
Forum: Tech Log
13th Jul 2011, 16:47
Replies: 1,998
Views: 400,363
Posted By Diversification

Stick mechanism

A33Zab
Thanks for a nice and illustrative picture of the stick mechanism.
I wonder if a very strong force on the stick to the left could force some undesired nose-up if the enclosing structure is...
Forum: Tech Log
13th Jul 2011, 14:01
Replies: 1,998
Views: 400,363
Posted By Diversification

FBW Investigation Primer

BOAC posted an intressant link; Fly-By-Wire A Primer for Aviation Accident Investigators (http://cf.alpa.org/internet/alp/2000/febfbw.htm)
I have enjoyed reading the short description of how FBW...
Forum: Tech Log
9th Jul 2011, 17:10
Replies: 1,998
Views: 400,363
Posted By Diversification

Missing ACARS explanations

Hi All!

This thread has been most interesting to me. Especially on points where the opinions among "experts" differ.
I am still surprised by the fact that BEA gave no hints in the short list...
Forum: Tech Log
30th May 2011, 18:58
Replies: 2,070
Views: 475,778
Posted By Diversification

Why no clarification of ACARS in BEA paper?

Hi!
I have been following these discussions on several forums for some years now.and learnt a lot. However, there are some unexplained, and unexpected, messages in the ACARS stream. Some of these...
Forum: Tech Log
29th May 2011, 21:49
Replies: 2,070
Views: 475,778
Posted By Diversification

Nose-up?

How shure are we that the "nose-up" was made by the pilot flying. I have been thinking about a possible sudden malfuntion of his side-stick, like a broken spring or failing position transducer....
Forum: Tech Log
28th May 2011, 14:40
Replies: 2,070
Views: 475,778
Posted By Diversification

Devionics:

"listen to what ArnieG has to say..."
I got that talk in print. To a large part rubbish. Because it is in my own area of specaialist competence it was sad to read. Many statements made are wrong,...
26th May 2011, 14:47
Replies: 198
Views: 21,057
Posted By Diversification

Typing during flight

I have so often seen complaints about pilots typing in data before a landing. I have the following suggestion.
Today we have memory sticks with capacities above 64 GBytes which could easily store...
Forum: Tech Log
25th May 2011, 16:29
Replies: 2,546
Views: 716,787
Posted By Diversification

Available alteratives to pitots

The intereting discussion about airspeed measurements seems fixed on pitot systems. However, several commercially available alternatives exist. Maybe they are too expensive or too new to be used by...
Forum: Tech Log
24th May 2011, 13:46
Replies: 2,546
Views: 716,787
Posted By Diversification

BUSS again

SnowFalcon2 wrote:
"This sounds contradictory to the description given by takata here (http://www.pprune.org/tech-log/449639-af-447-search-resume-part2-112.html#post6469798). The manual says that...
Forum: Tech Log
24th May 2011, 12:51
Replies: 2,546
Views: 716,787
Posted By Diversification

BUSS

GolfSierra:

"Given the availability of technologies such as GPS, Inertial navigation, radio navigation, radar, AOA sensors - is it possible to build an avionics package which could automatically...
Forum: Tech Log
23rd May 2011, 10:12
Replies: 2,546
Views: 716,787
Posted By Diversification

QF72 interrim report 2

Cited from the report:
"As outlined in the first Interim Factual Report, two significant safety factors have been identified with the aircraft’s systems:
• an air data inertial reference unit...
Forum: Tech Log
10th Apr 2011, 19:48
Replies: 3,893
Views: 1,222,335
Posted By Diversification

36G

If this arm really broke on impact or before/after has been discussed a lot earler. A close look at enlargements of the published pictures shows:
1. Typical signs of corrosion.
2. No trace of...
Showing results 1 to 25 of 67
 


 
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