American B767's develop cracks in pylons
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American B767's develop cracks in pylons
FAA asks American to re-inspect 767’s
The Associated Press
Sunday, June 27, 2010 | 12:05 a.m.
The Federal Aviation Administration has advised American Airlines to re-inspect 56 of its Boeing 767 jets after cracks were detected on at least two planes.
American spokesman Tim Wagner says the cracks were discovered in the pylons that attach the engines to the wings.
Wagner says 54 planes had been inspected by Monday. He says the Fort Worth-based airline has sent one of the cracked pylons to an outside company for metallurgy testing.
Wagner says the inspections have not caused any major disruption to American's schedule.
The Associated Press
Sunday, June 27, 2010 | 12:05 a.m.
The Federal Aviation Administration has advised American Airlines to re-inspect 56 of its Boeing 767 jets after cracks were detected on at least two planes.
American spokesman Tim Wagner says the cracks were discovered in the pylons that attach the engines to the wings.
Wagner says 54 planes had been inspected by Monday. He says the Fort Worth-based airline has sent one of the cracked pylons to an outside company for metallurgy testing.
Wagner says the inspections have not caused any major disruption to American's schedule.
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I may well be a humble SLF with a passion for aviation but I remember the fate of Flt. AA191 in 1979 due to a cracked engine pylon.
American Airlines Flight 191 - Wikipedia, the free encyclopedia
MP
American Airlines Flight 191 - Wikipedia, the free encyclopedia
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Last edited by Mr Pax; 29th Jun 2010 at 21:27.
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Cracks on aircraft are not necessarily a safety issue, it all depends on where the crack is, its length, depth etc. Any crack and its dimensions can be referenced to the engineering manuals and decided as to whether or not its out of limits.
I have worked on the VC10, and one can find many cracks in the wings which lead to different categories of fuel seep. Some acceptable, some not. This will apply to the engine pylon referred to here as well.
I have worked on the VC10, and one can find many cracks in the wings which lead to different categories of fuel seep. Some acceptable, some not. This will apply to the engine pylon referred to here as well.
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Dash-7 lover said I'm sure BA had the same problem after they took delivery of theirs...or was it the early 777 deliveries...my memory isn't what it was.
Your memory is quite correct. There were some extensive cracks on the early B767`s in B A.
Doubler plates on the internal bulkhead solved the problem initally, I think Boeing redisigned the pylon later.
Tristar 500
Edited to remove double entry Tristar 500
Your memory is quite correct. There were some extensive cracks on the early B767`s in B A.
Doubler plates on the internal bulkhead solved the problem initally, I think Boeing redisigned the pylon later.
Tristar 500
Edited to remove double entry Tristar 500
Last edited by tristar 500; 9th Jul 2010 at 20:06.
Besides the DC-10 accident, AA also had a B727-200 drop an engine in flt.
So IMHO concern is warented.
So IMHO concern is warented.
carry on
BA never..
...how about back when.. BOAC 911? B707? lost engine, then lots of other parts due CAT. Don't shoot, just in interests of accuracy. Have photo somewhere of this plane as a 3 engine B707 for a very short period.
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You are both right. The LHR - ZRH 707 separation wasnt from a cracked pylon though, the 2nd stage compressor fan disintegrated and blew the whole engine off the wing.
ICAO Aircraft Accident Digest 18-II
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Cracked Engine Pylons ?
Why the surprise, the CF6-50C2 turbines are so powerful now that I dont know how those pylons cope with those loads in the first place. The RB211-524s used on test Air Force VC10s, used to bend the fueslage, so there ya go.
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AA lost #1 at ORD, but it was no accident. It was negligence, and criminal. The C5 and L-188 had cracks and lost a few, those were accidents. Whirl and insufficient spar strength. Accidents are called that because there is an element of surprise, they are "unpredictable".
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Going back to 1987 -
I observed a PAA A310 in the LH barn at HAM being nursed back to health after an HPT interstage seal failure. The unbalance was so bad it made the LPT orbit, so it started chucking blades out the side of the case. Result: trashed #1 engine, severe acne all over the LH underbelly, holes in the stab LE,
...and a bent #1 pylon.
I observed a PAA A310 in the LH barn at HAM being nursed back to health after an HPT interstage seal failure. The unbalance was so bad it made the LPT orbit, so it started chucking blades out the side of the case. Result: trashed #1 engine, severe acne all over the LH underbelly, holes in the stab LE,
...and a bent #1 pylon.
I'm sure BA had the same problem after they took delivery of theirs...
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