Summary
The FAA proposes to supersede an existing airworthiness directive (AD) for Honeywell International Inc. ALF502 series and LF507 series turbofan engines with certain fuel manifold assemblies installed. That AD currently requires initial and repetitive on-wing eddy current or in-shop fluorescent penetrant inspections of certain part number (P/N) fuel manifold assemblies for cracks, and replacement of cracked fuel manifolds with serviceable manifolds. This proposed AD would continue to require inspecting those fuel manifolds for cracks, would also add leak checks of certain additional P/N fuel manifolds, and would specify replacement of the affected manifolds as an optional terminating action in lieu of the repetitive inspections. This proposed AD results from reports of fire in the engine nacelle. We are proposing this AD to detect cracks in certain fuel manifolds and fuel leaks from other fuel manifolds, which could result in a fire in the engine nacelle and a hazard to the aircraft.