Background
CurrentBackground
Background Background
The original Directive required inspection of certain JT8D combustion chamber outer cases following advice of the failure of two cases in service. The failures initiated from an area of incomplete weld during manufacture. Undetected cracking of the combustion chamber outer case, could result in an uncontained engine failure.
This amendment allows only ultrasonic inspections and supersedes the original AD which allowed visual or fluorescent magnetic penetrant inspections (FMPI) under certain conditions.
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