Airworthiness directives › 2024-12-04
AD 2024-12-04 Airworthiness Directives; Pratt & Whitney Engines
Models named: PW2037, PW2037M, PW2040. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Pratt & Whitney (PW) Model PW2037, PW2037M, and PW2040 engines with a high-pressure turbine (HPT) 2nd stage blade assembly, part number (P/N) 1B7522 installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Before exceeding the applicable compliance times specified in Planning Information, Compliance, page 2, of PW Alert Service Bulletin PW2000 A72-777, Revision 2, dated April 11, 2023 (PW2000 A72-777, Rev. 2), or before accumulating 500 cycles after the effective date of this AD, whichever occurs later, perform all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of PW2000 A72-777, Rev. 2.
Unsafe condition
This AD was prompted by an in-flight shutdown caused by the fracture of HPT 2nd stage turbine hub assembly lugs. The FAA is issuing this AD to prevent failure of the HPT 2nd stage turbine hub assembly lug and HPT 2nd stage blade assemblies. The unsafe condition, if not addressed, could result in the uncontained release of the HPT 2nd stage blade assemblies, damage to the engine, and damage to the airplane.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1