Summary
The FAA proposes to adopt a new airworthiness directive (AD) for Honeywell International Inc., T5313 and T5317 series turboshaft engines. This proposed AD would require initial and repetitive visual inspections and initial and repetitive ultrasonic inspections. This proposed AD results from eight instances of cracks in combustion chamber housings (CCHs). Two of the instances resulted in an engine shutdown during flight. We are proposing this AD to detect cracks in the CCH, which could result in rupture of the CCH, leading to loss of engine power and damage to the helicopter.