Airworthiness directives › 2023-06-14
AD 2023-06-14 Airworthiness Directives; Pratt & Whitney Canada Corporation Turbofan Engines
Applicability*9
This AD applies to: (1) Pratt & Whitney Canada Corporation (P&WC) PW308A model turbofan engines with build specification (BS) BS935 and BS1249, serial numbers PCE-CE0180 and prior; and (2) P&WC PW308C model turbofan engines with BS1047 and BS1238, serial numbers PCE-CF0967 and prior.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Except as specified in paragraphs (h) and (i) of this AD: Perform all required actions within the compliance times specified in, and in accordance with, Transport Canada AD CF-2022-22.
Unsafe condition
This AD was prompted by a manufacturer's design review which identified that the combustion chamber outer case to rear compressor case flange bolts low cycle fatigue life was inadequate, and that those flange bolts may develop cracks resulting in flange bolt fracture. The FAA is issuing this AD to prevent cracking and fracture of the flange bolts. The unsafe condition, if not addressed, may result in flange bolt fracture, flange separation or case rupture, damage to the engine, and damage to the airplane.
Affected ADs
None.
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