Airworthiness Directive · Amendment 39-22400 · Turbine engine combustion section
Pratt & Whitney Canada Corporation Turbofan Engines
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.
The FAA is adopting a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corporation (P&WC) PW308A and PW308C model turbofan engines. This AD is prompted by a manufacturer's design review, which identified that the combustion chamber outer case (CCOC) to rear compressor case (RCC) flange bolt low cycle fatigue life was inadequate and that those flange bolts may develop cracks resulting in flange bolt fracture. This AD requires replacing all CCOC flange bolts and modifying the CCOC and inner bypass ducts. This AD also prohibits installation of certain flange bolts on any affected engine, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is issuing this AD to address the unsafe condition on these products.
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.
Where Transport Canada AD CF-2022-22 requires compliance from its effective date, this AD requires using the effective date of this AD.
Although the service information referenced in Transport Canada AD CF-2022-22 specifies to submit certain information to the manufacturer, this AD does not include that requirement.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
