Squawk Box

May 2000 Issue

Combat Fatigue

Air combat simulation T-34s found to have extensive fatigue cracking

The following information is derived from the FAA’s Service Difficulty Reports and Aviation Maintenance Alerts. Click here to view "Airworthiness Directives."

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Following on the heels of an airworthiness directive and an earlier warning about aerobatic flight, the FAA is continuing its investigation into fatigue on T-34s used in air combat simulation.

After the April 1999 accident that followed the in-flight wing separation of a T-34A Mentor, a metallurgic examination found structural fatigue cracks at several of the fracture surfaces. An examination of the left wing, which did not separate from the airplane, also displayed fatigue...

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