Squawk Box

April 2009 Issue

Cracked, Loose, Failed

The following information is derived from the FAA’s Service Difficulty Reports and Aviation Maintenance Alerts.

The forward outboard, lower wing spar caps were found cracked. The cracks—on both left and righthand assemblies—radiated out from the fourth Huck rivet forward, passing through the wing attach hinge. This aircraft was inspected 15 months /404.2 hours ago by eddy current. No cracks were found at that time. Wing lower spar cap part numbers: l/h: 000-110012-1; r/h: 000-110012-2.

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