Pylon Assembly News Today

Outside tucson, arizona. >> you can see up here the pylon assembly, in which the engine rests on the pylon and then its attached to the wing. >> it looks like an arm that the engine is hanging off of. thats a very complicated piece of structure. it has to be designed to take a heck of a load from the engines. >> investigators also scrutinize the planes service history. and thats where the puzzle pieces start to come together. it turns out not to be a design flaw. its a troubling maintenance prac...

Engine more quickly. >> they just dropped the entire unit from the wing. changed the component and put it all back together. in theory it sounded great, on paper it looked good. >> its when maintenance workers are reattaching the engine and pylon eight weeks before the crash the soon to be fatal mistake is made. if the airline had followed manufacturer requirements, workers would have simply reattached the engine to the pylon using a specialized machine, recommended by the manufacturer. but beca...

>> you can see the pylon assembly, on which the engine rests on the pylon and its attached to the wing. >> it looks like an arm that the engine is hanging off of. thats a very complicated piece of structure. it has to be designed to take a heck of a load from the engines. >> investigators also scrutinize the planes service history. thats where the puzzle pieces start to come together. it turns out not to be a design flaw. its a troubling maintenance practice. >> the whole issue of the accident c...

From the pylon but leaving the pylon attached to the wing. at the time, engineers from several airlines were using a shortcut. they found if the pylon and engine were removed in one piece, they could change the engine more quickly. >> they just dropped the entire unit from the wing. changed the component and put it all back together. in theory it sounded great, on paper it looked good. >> its when maintenance workers are reattaching the engine and pylon eight weeks before the crash the soon to b...

>> you can see the pylon assembly, on which the engine rests on the pylon and its attached to the wing. >> it looks like an arm that the engine is hanging off of. thats a very complicated piece of structure. it has to be designed to take a heck of a load from the engines. >> investigators also scrutinize the planes service history. thats where the puzzle pieces start to come together. it turns out not to be a design flaw. its a troubling maintenance practice. >> the whole issue of the accident c...

From the pylon but leaving the pylon attached to the wing. at the time, engineers from several airlines were using a shortcut. they found if the pylon and engine were removed in one piece, they could change the engine more quickly. >> they just dropped the entire unit from the wing. changed the component and put it all back together. in theory it sounded great, on paper it looked good. >> its when maintenance workers are reattaching the engine and pylon eight weeks before the crash the soon to b...

Went right into the ground. everything in its path was blown into a sheet of flame. >> initially, ntsb investigators are baffled what could have caused a failure of this magnitude. >> this is all thats left of american airlines flight 191, as far as it got on its way to los angeles. >> they sift through the wreckage and look to the planes two flight recorders for clues. within days of the crash, it began to zero in on a part called the pylon. it has a 13-inch crack they believe was caused by fat...

They could change the component, put it all back together. in theory it sounded great, on paper it looked good. >> its when maintenance workers are reattaching the engine and the soon to be fatal mistake is made. if the airline had followed manufacturer requirements, workers would have simply reattached the engine to the pylon using a specialized machine, recommended by the manufacturer. but because theyve removed the massive engine/pylon assembly together, now it has to be replaced as one unit....

Angeles. >> they sift through the wreckage and look to the planes two flight recorders for clues. within days of the crash, it began to zero in on a part called the pylon. it has a 13-inch crack they believe was caused by fatigue prior to the crash, which maintenance inspections had missed. what exactly is a pylon? aviation consultant john cox showed us at evergreen international, an airplane maintenance and storage facility outside tucson, arizona. >> you can see the pylon assembly, on which th...

Crash that the soon-to-be fatal mistake is made. if the airline had followed manufacturer requirements, workers would have simply reattached the engine to the pylon using a specialized machine, recommended by the manufacturer. but because theyve removed the massive engine/pylon assembly together, now it has to be replaced as one unit. using a forklift, workers inadvertently crack the top section of the pylon called the flange as they try to fit the assembly back on to the plane. >> because they ...