Summary
The Federal Aviation Administration (FAA) proposes to adopt a new airworthiness directive (AD) that is applicable to Honeywell International Inc. (formerly AlliedSignal Inc.) LTS101 series turboshaft engines; and LTP101 series turboprop engines. This proposal would require a one-time visual inspection for surface finish and a one-time fluorescent penetrant inspection for cracks of certain impellers installed on LTS101 series turboshaft and LTP101 series turboprop engines. This proposal is prompted by a report of a machining discrepancy that may have occurred during manufacture of the affected impellers. The actions specified by the proposed AD are intended to prevent impeller failure from cracks in the impeller back face area, which could result in an uncontained engine failure.