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Search: Posts Made By: Diversification
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Forum: Tech Log
10th Apr 2011, 19:48
Replies: 3,893
Views: 1,542,759
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...
Forum: Tech Log
5th Mar 2011, 00:04
Replies: 3,893
Views: 1,542,759
Posted By Diversification

AIS system

What is AIS:
The UN-organisation, IMO, in its International Convention for the Safety of Life at Sea (SOLAS) requires AIS to be fitted aboard international voyaging ships with gross tonnage (GT) of...
Forum: Tech Log
24th Nov 2010, 22:12
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Mayday or not

There has been some arguments posted here about why the pilots of AF447 would not send any mayday when in beginning trouble.
On a.net you can find a description of an event on AF445 between Paris...
Forum: Tech Log
11th Nov 2010, 19:45
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Svarin . Thanks for the very important info....

Svarin .
Thanks for the very important info. about the ACARS - which I have missed. Why is it so? This implies that much of the speculation on this thread and on a.net is based in incomplete info...
Forum: Tech Log
11th Nov 2010, 19:16
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Re: Black holes

Svarin,
I agree to some degree with your statements, however, in my eyes, the reports are still somewhat loopsided giving, e.g. some detailed data on the engines (like their numbers) but not very...
Forum: Tech Log
11th Nov 2010, 16:15
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Black holes

I have been reading the two BEA reports on AF447 back and forth a couple of times now. Compared to earlier AAIB reports on upsets like QF72, and others, the BEA reports are almost completely empty of...
Forum: Tech Log
3rd Nov 2010, 23:53
Replies: 3,893
Views: 1,542,759
Posted By Diversification

HN39 Maybe my wording was not explicit and...

HN39

Maybe my wording was not explicit and clear enough regarding two AoA:s. It read "When only two AoA:s are in use, their average is said to always be used." By in use I meant being used by the...
Forum: Tech Log
3rd Nov 2010, 19:23
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Disagreements - addendum

We should be aware of the possibility that the system works in other ways as it is "software driven" and this kind of software sometimes is modified, up-dated, replaced.
In principle it is thus...
Forum: Tech Log
3rd Nov 2010, 18:23
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Disagreements

When i look at the published diagrams of the system, the signal from a pitot tube is measured/digitized by an ADM unit and the resulting data sent on a data-bus to the corresponing ADIRU unit. That...
Forum: Tech Log
2nd Nov 2010, 19:42
Replies: 3,893
Views: 1,542,759
Posted By Diversification

HN39 Accept my humble apology. I made an...

HN39

Accept my humble apology. I made an error in translating the french and added more meaning than was there.

Regards
Forum: Tech Log
2nd Nov 2010, 13:07
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Accident report recommendations

Hi

I was reading the old report by BEA on the accident of Pan Am 816 back in 1977.
http://www.bea.aero/docspa/1973/n-pa730722/pdf/n-pa730722.pdf
The second recommendation of the two given by...
Forum: Tech Log
31st Oct 2010, 23:27
Replies: 3,893
Views: 1,542,759
Posted By Diversification

HF-sets

Excuse a comment from a non-aviator/ but one who directed safety related research in the nuclear field for may years before retiring:

I have been following this string for a long time now, and...
Forum: Tech Log
9th Jul 2010, 15:25
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Software bugs

kilomikedelta, mountainwest, mosteo and Peter-1959

Even the best designed, coded, and verified program can contain undiscovered bugs only showing up on very special occations - usually unforseen...
Forum: Tech Log
6th Jul 2010, 20:57
Replies: 3,893
Views: 1,542,759
Posted By Diversification

HELP-button

Please bear with me!

I have already at least once before argued that the so called "memory item" to apply on triple airspeed disagrement perhaps should be preprogrammed with automatic execution on...
Forum: Tech Log
24th Jun 2010, 14:26
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Analog And Digiltal Data

JD-EE and others

Permit an old software designer to make some comments. For your knowledge
I am no pilot, the closest I have come is by designing and debugging software for high altitude rockets...
Forum: Tech Log
31st May 2010, 14:46
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Procedures

I have read the following in the A330-340 Flight Crew Training manual (perhaps not the latest version?)
"Triple IRS or ADR failure is very unlikely and is not displayed on the ECAM. Should a triple...
Forum: Tech Log
29th May 2010, 11:34
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Pitot tube simulator

By chance I found a Pitot Tube simulator on the internet. Using this you can block the drain port, etc, and study the effect. I don't know how accurate the simulation is, but the pitot tube is rather...
Forum: Tech Log
28th May 2010, 15:20
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Hi again! I am not ignoring the fact that three...

Hi again!
I am not ignoring the fact that three different speed values were reported by the three ADIRU:s. However, we donīt know if one of them was correct. I fully agree with you and others that...
Forum: Tech Log
28th May 2010, 13:08
Replies: 3,893
Views: 1,542,759
Posted By Diversification

takata "Triple probe fail". This is not...

takata
"Triple probe fail". This is not necessary at all to generate the ACARS msg ADR disagree. Two bad and different speed values are enough, because the system can't decide which of the three...
Forum: Tech Log
27th May 2010, 19:30
Replies: 3,893
Views: 1,542,759
Posted By Diversification

takata Please take a look at the systems...

takata
Please take a look at the systems schematic. This has been shown multiple times in the old thread. Any signal had to pass a digitizer then to the ADIRU until a speed is computed and the ADR...
Forum: Tech Log
27th May 2010, 16:22
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Takata and others The ACARS msg content is...

Takata and others

The ACARS msg content is that ADIRU:s reported air-speed values disagree. Pitot problem is only one of many possibilities. The error can occur anywhere between the pressure on...
Forum: Tech Log
12th May 2010, 21:59
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Cabin pressure

Tekata and others.
I found the following statements in one of my files:
"Report No: 4/2009. Report on the serious incident to Airbus A319-111, registration G-EZAC, near Nantes, France on 15...
Forum: Tech Log
8th May 2010, 22:19
Replies: 3,893
Views: 1,542,759
Posted By Diversification

DenisG and others, It seems from the posted...

DenisG and others,

It seems from the posted info that Airbus is using its three ADIR units to provide three separate IRS positions. Probably these are then compared with a "dead-reckoned" new...
Forum: Tech Log
8th May 2010, 21:00
Replies: 3,893
Views: 1,542,759
Posted By Diversification

DenisG Many thanks for the rapid and rather...

DenisG

Many thanks for the rapid and rather complete info.
I will try to analyze it to my best ability. One question still remains - the IR-fault messages by ACARS could indicate that there...
Forum: Tech Log
8th May 2010, 20:13
Replies: 3,893
Views: 1,542,759
Posted By Diversification

FM vs GPS position

Denis and others.

The first accident reports states the following:
"The first position message (AOC type message) was transmitted on 31 May at
22 h 39. On 1st June at 2 h 10 min 34, the last...
Forum: Tech Log
29th Apr 2010, 20:18
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Seismic arrays

Large arrays of very sensitive sesmometers are operated by several countries around the world to verify that no "illegal" nuclear tests are made by anybody. I have tried to get their sensitivity and...
Forum: Tech Log
13th Mar 2010, 12:05
Replies: 3,893
Views: 1,542,759
Posted By Diversification

36 g

Hazelnut.
I will try to explain and motivate my opinion. When I/you look carefully at the photo where the corroded edge of "arm 36 g" and the bolt is shown it is rather obvious that there was no...
Forum: Tech Log
12th Mar 2010, 09:11
Replies: 3,893
Views: 1,542,759
Posted By Diversification

36 g again

The correct translation (see post #440) of the french report shows that 36 g is a part name and not acceleration.
Forum: Tech Log
9th Mar 2010, 15:36
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Arm 36 g again

After a lot of thinking about how the badly corroded end of arm 36 g could have played a role in the accident, I now think that it is irrelevant. It points more to a potential danger in future...
Forum: Tech Log
6th Mar 2010, 22:58
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Arm 36 g

I have been looking a lot at the right photo in IRep-2 of arm 32 g and manipulated the photo in various ways. The washer under the bolt-head seems browned by corrosion. None of the other similar...
Forum: Tech Log
5th Mar 2010, 09:24
Replies: 3,893
Views: 1,542,759
Posted By Diversification

LN-PAA again

Try this link to get the report; 1993/03 | sht (http://www.aibn.no/aviation/reports/1993-031)
My previous post apparently disappeared somehow.
Forum: Tech Log
5th Mar 2010, 00:10
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Delay

CJ and Bear, my answer is delayed because for some unknown reason, the administrator wanted to check it first.
Forum: Tech Log
5th Mar 2010, 00:07
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Yes CJ. Here is the link. 1993/03 | sht...

Yes CJ. Here is the link. 1993/03 | sht (http://www.aibn.no/aviation/reports/1993-031)

Bear: I am now retired, but spent much of my life on research regarding nuclear reactor safety. I am also...
Forum: Tech Log
4th Mar 2010, 23:47
Replies: 3,893
Views: 1,542,759
Posted By Diversification

LN-PAA

I once lost a friend who was pilot in command on LN-PAA when they lost the fin and rudder over the sea between Norway and Denmark. According to the accident analysis the aircraft then behaved in a...
Forum: Tech Log
4th Mar 2010, 20:37
Replies: 3,893
Views: 1,542,759
Posted By Diversification

Acceleration

I have seen the value 36g mentioned as the acceleration on impact. I think this mat be based on a misunderstanding of a text in one of the photos in the accident reports. I have assumed that "36g" in...
Showing results 1 to 35 of 35


 
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