Airworthiness Directive · Amendment 39-22526 · Turbine section
International Aero Engines, LLC Engines
Superseded. A later AD replaced this one: AD 2024-05-11. Comply with the one in force.
This AD applies to International Aero Engines, LLC (IAE LLC) Model PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G-JM, PW1127G1-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, PW1133GA-JM, PW1428G-JM, PW1428GA-JM, PW1428GH-JM, PW1431G-JM, PW1431GA-JM, and PW1431GH-JM engines with an installed:
(1) High-pressure turbine (HPT) 1st-stage hub, part number (P/N) 30G6201 or 30G7301, with a serial number (S/N) listed in Tables 1, 2, 3, or 4 of Pratt & Whitney (PW) Special Instruction No. 149F-23, dated August 4, 2023; or
(2) HPT 2nd-stage hub, P/N 30G5502 or 30G6602, with an S/N listed in Tables 1, 2, 3, or 4 of PW Special Instruction No. 149F-23, dated August 4, 2023.
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines, LLC (IAE LLC) Model PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G-JM, PW1127G1-JM, PW1127GA-JM, PW1129G- JM, PW1130G-JM, PW1133G-JM, PW1133GA-JM, PW1428G-JM, PW1428GA-JM, PW1428GH-JM, PW1431G-JM, PW1431GA-JM, and PW1431GH-JM engines. This AD was prompted by an updated analysis of an event involving an IAE LLC Model PW1127GA-JM engine, which experienced a high-pressure compressor (HPC) 7th-stage integrally bladed rotor (IBR-7) separation that resulted in an aborted takeoff. This AD requires performing an ultrasonic inspection (USI) of the high-pressure turbine (HPT) 1st- stage hub and HPT 2nd-stage hub for cracks and, depending on the results of the inspections, replacing the HPT 1st-stage hub or HPT 2nd- stage hub. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within 30 days after the effective date of this AD, perform an ultrasonic inspection (USI) of the HPT 1st-stage hubs for cracks in accordance with the Accomplishment Instructions, paragraph 9.A. or 9.B., as applicable, of PW Service Bulletin (SB) PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 2022 (PW1000G-C-72-00-0188-00A-930A-D, Issue 002).
(2) Within 30 days after the effective date of this AD, perform a USI of the HPT 2nd-stage hubs for cracks in accordance with the Accomplishment Instructions, paragraph 9.C. or 9.D., as applicable, of PW SB PW1000G-C-72-00-0188-00A-930A-D, Issue 002.
(3) If a rejectable indication is found during the inspections required by paragraph (g)(1) or (2) of this AD, before further flight, replace the HPT 1st-stage hub or HPT 2nd-stage hub with a part eligible for installation.
For the purpose of this AD, a “part eligible for installation” is:
(1) Any HPT 1st-stage hub or HPT 2nd-stage hub that has passed the USI required by paragraphs (g)(1) or (2) of this AD.
(2) Any HPT 1st-stage hub or HPT 2nd-stage hub with a certificate of conformance indicating “PW1000G-C-72-00-0188-00A-930A-D,” “1 CODE 45S,” or identified by part marking “21CC332” or “SB 72-0188.”
