Metal fatigue in an engine is being blamed for problems which resulted in the airliner having to make an emergency landing.
Crashes in the early days of commercial jets tended to be caused by technical faults, such as metal fatigue in the airframe or engines.
The crash is later attributed to metal fatigue brought on by a previous faulty repair job.
The cause was metal fatigue of two of the elevator bolts.
He is dismayed to notice metal fatigue in the engine room.