cv990 From , joined Dec 1969, posts, RR: Posted (16 years 5 months 3 weeks 6 days 3 hours ago) and read 737 times:
Many of you may be following this topic, but there have been some new developments in the MD-11 wiring problems that may have bearing on the SR 111 crash. I'm summarizing from a news report:
From inspections of existing MD-11s and from HB-IWF wreckage, there is evidence of serious wiring problems near 1) a circuit breaker panel located
in the cockpit ceiling 2) the entertainment system used by SR. The breaker panel was the subject of a directive in 1993 that required extensive handling of the wiring near it. It appears that some of this work may have lead to wire and/or insulation damage. Also, it seems that some of the existing SR entertainment units, which are now turned off, show some sloppy work and questionable practices -- using wrong tools, mixing hard and soft insulation so that the latter is worn off, sharp bends, etc. The implication is that the Interactive Flight Systems company was responsible for this. But there was a mysterious statement to the effect that 'other wire work was done in this area, not related to the entertainemtn unit', or something like that.
There was no mention about just what was found on various other airlines' MD-11s. They all would have had to do the circuit panel mods, and I wonder if,
for example, AA and FedEx ships showed some problems. If so, they probably don't want to publicize it.
Finally, the investigators stopped short of saying just what wiring or system caused the crash --- but the prevailing opinion was that it was probably one or both of these problem areas. At least it is consistent with some of the charred wire in the wreckage.
RAWCH From Switzerland, joined Feb 2006, 17 posts, RR: 0
Reply 1, posted (16 years 5 months 3 weeks 6 days 2 hours ago) and read 735 times:
Could you please tell me where you read this report. I read a similar report on the Swiss Newspaper Blick, but would like to read it in english.
If I am not mistaken, the report hinted that this company that made or manufactures the entertainment system is in Arizona and is being investigated heavily. Also they are asking questions about FAA aproving this system.
aviator_ua From , joined Dec 1969, posts, RR:
Reply 3, posted (16 years 5 months 3 weeks 5 days 16 hours ago) and read 733 times:
Cv, you are right on the money.
I read that report also and it was frightening.
Mixing Tefzel and Kapton wiring has long been known to be hazardous. Also, according to Boeing, no wire should have a "bend" of more than 90 degrees. They found many with more than 90 degrees of bend.
The most troubling part of the report is where they stated that "pliers" were used to shape the wires. Accorgind to Boeing, pliers should NEVER be used to work with this very soft wiring. Chafed insulation around the wiring, some planes had wiring that did not follow the correct paths and many other troubling aspects of this aircraft warrant its immediate grounding for a full level C inspection. For the saftey of the passengers and the crews who must fly her the full inspections are needed now. The FAA says it will issue and AD in 90 days. Leave it to the FAA to drag its butt.
L-188 From United States of America, joined Jul 1999, 30102 posts, RR: 58
Reply 5, posted (16 years 5 months 3 weeks 5 days 10 hours ago) and read 734 times:
The NTSB is a seperate agency. Not only to the investigate airline accidents but they also do the investigations for Marine, rail, road and pipeline accidents. They don't actually have a regalatory authority(Good). The only make recomendations the the agencies on changes to be make. The FAA, Coast Guard, Highway Administration and all the others actually make the choice on which rules are viable and are the most effective.
My pesonal opinon is that the NTSB should remain as it is. Only recommending changes. That way they don't have to respond to opinion and can release as critical of a report as nessisary. Remeber the American Eagle ATR crash. The NTSB ran tests showing the effects of icing being the boots. These tests included flying behind an icing tanking and filming the buildup of ice. The French equivelent in an effort to protect ATR called the accident "pilot error". This is what would happen if the NTSB were givin regalatory responsiblities.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
cv990 From , joined Dec 1969, posts, RR:
Reply 6, posted (16 years 5 months 3 weeks 5 days 10 hours ago) and read 738 times:
This was referenced by Yahoo in a search involving the key word "Swissair".
They have an archive relating to the crash & it has been covenient bookmark it
and follow events. Most of the good reports seem to be emanating from Canadian press sources at the moment.
If this is not helpful, please advise and I'll get more specific.
Will From Australia, joined May 1999, 79 posts, RR: 0
Reply 7, posted (16 years 5 months 3 weeks 5 days 10 hours ago) and read 735 times:
For some good information on SR 111, have a look at the Swissair web site (www.swissair.com), they have a good FAQ's section of which l think is a little bias, but generally okay. Check out the links provided, especially the Candian Transport Safety web site. Lots of good up to date infomation and pics.