embpic

Messy maintenance?

Well you have just demonstrated you lack of knowledge in this case. The part that failed was the aft engine mount. The engine was recovered from the lake (I have seen it). It was found to be a bad weld by the manufacturer of the part. This was NOT a result of poor maintenance by Kalitta.

CcrlR737pilot

If they had poor maintenance, then they would have been shut down for that or told to change their program.

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Boeing777

This is really surprising! But everyone that says age of an aircraft matters, I have proof that it doesn't. My family owns a 1943 Piper Cub, a 1950 Piper Pacer, and a 1956 Piper Pacer PA-22/20.

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Captain Wahoo

What are the number of cycles on those aircraft and the weight difference of a Piper Cub to a 747. Landing and the years of taking turbulence, a 747 flexes a lot more than a Piper Cub. Years and years of that flexing can cause metal fatigue. That is why they use a flourescope to look for cracks. I am sure Carl could give more info on the process and the correct spelling.

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embpic

I seriously doubt it was metal fatique. If it was breaking up on the takeoff roll then I highly doubt that the pieces would stay so close together where she came to rest. This plane is a factory built freighter. It was built in July of 1980.

CO777

Ok my "source" says something other:

PROBABLE CAUSE: "The number one engine separated from the airplane during climb due to the uncontained separation of a portion of the second stage turbine disk rim after the second stage turbine vanes contacted the disk. The second stage turbine vanes contacted the second stage turbine disk due to the operator's inadequate inspection of the high pressure turbine module and the improper repair of the module by unknown maintenance personnel."

source

By the way... Kalitta got the first -400 Freighter:

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furryforest

On a lighter note-great PR picture for ICE

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rapleylikeba

Ouch! That must have been painful (I know nobody died but if something could dig into you it would be extremely painful, especially when the fusalage vibrates on the ground).

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Captain Wahoo

Now that would be an awesome 1:400!

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CcrlR737pilot

Thanks for asking me, first there is a borescope where they can look inside the aircraft engine for any problems but if you need to check for cracks, then you have to use NDT(Nondestructive Testing) which involves taking the engine apart and inspecting the parts that take on the most stress. NDT uses different procedures to find cracks not visible with the naked eye and each type of test depends on the part being examined. Some of the tests done on the parts show the cracks easily than before.

As for the 747 that lost an engine in Lake Michigan, I read the whole thing on ASN and I did not understand the whole problem until I read the NTSB summary of the accident. When you use different things on certain bolts, they may cause cracks from corrosion(2 different metals) as with any other part on the aircraft. Also, There is a small space where the blades do not contact the casing but if it does touch the casing, then it will cause damage. That is what happened here.

I would not point at the maintenance personel but the practices and the background of the engine. The NTSB does not put blame on anyone but just finds out the cause of the accident.

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furryforest

I'm the sorta guy who can't put flat pack furniture together without a) having pieces left over and b) needing enough supplies to keep a Special Forces mission operating behind lines for two weeks so you'll have to excuse my ignorance when i ask this question.

How much time is involved in these methods?

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CcrlR737pilot

It depends on the part and the method being used. This should explain the methods that are used.

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CO777

This power loss, which was accompanied by a “detonation”, occurred as the aircraft reached the V1 speed – the threshold beyond which a crew normally must commit to becoming airborne, because the aircraft cannot be stopped safely on the runway.
The crew heard the noise and air traffic controllers witnessed flames from the right side of the aircraft.
Two seconds later the engine thrust was reduced to idle and the aircraft decelerated, but failed to stop before the runway end. Thrust reversers were not deployed, although a rejected take-off calculation does not take reverser use into account.
All four engines were operating as the 747 overran and, upon inspection, showed no sign of catastrophic failure. The engine cowlings were not punctured.

Overrun Kalitta 747 suffered power loss but no engine damage

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