isn't always first rate. Back in 1979, there was an <a href=http://www.crashdatabase.com/cgi-bin2/webdata_crashdatabas
e.cgi?cgifunction=Search&Aircraft=DC-10
>American Airlines crash in Chicago directly caused by faulty maintenance.

At the moment, no one knows what caused this plane to go down. It could've been a mechanical failure or an act of sabotage. If the reports of poorly screened airport personnel are true, it's possible that someone on the ground crew tampered with the plane or put a bomb on it. It's also possible that the engine failed on its own, injested FOD, or even sucked in some big birds. If an engine comes apart on takeoff, it could throw hot pieces into the fuel tanks, damage the hydraulics, or cause other problems.

Date: 05/25/1979
Location: Chicago O'Hare, Illinois
Airline: American Airlines
Aircraft: McDonnell Douglas DC-10-10
Registration: N110AA
Fatalities/No. Aboard: 271:271 +2
Details: During takeoff just, as the plane lifted from the runway, the left engine and pylon separated from the aircraft damaging the wing and hydraulic system which caused the aircraft to roll and crash. Highest single plane death toll in U.S. aviation history. Asymmetrical
stall and the ensuing roll of the aircraft because of the uncommanded retraction of the left wing outboard leading
edge slats and the loss of stall warning and slat disagreement indication systems caused by separation of the engine and pylon. Improper maintenance procedures
used by American Airlines when dismounting the engines for maintenance, putting strain on the engine mounts.