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."


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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