[Myrddin]

Alaskan Airlines had a crash due to a defective jackscrew. The part wasn't certified. It lasted long enough to get airborne and halfway through the flight before failing. The aircraft, passengers and crew experienced an extended period of harrowing malfunction before crashing into the ocean. Repairing a plane with bogus, untested parts is asking for a replay.

[Churchillspirit]

I used to work for a company that made parts for airplanes. The paperwork was incredible. How could Alaska Airlines get away with using not certified parts?

I believe they are still in business.

[jettester]

You are wrong. The jackscrews were found to be not properly maintained at the recommended intervals as proscribed by the manufacturer. There was also concerns about how the airline deiced their horizontals and if that might of had an impact on the system malfunction.

[namsman]

I believe the root cause of that crash was improper lubrication of the jackscrew leading to a failure of the threads. I haven't seen anything to suggest that the part itself was not certified.