Airworthiness Directives; International Aero Engines, LLC Turbofan Engines
airworthiness · Rule · Final rule; request for comments. · Published 2020-03-20 · Effective 2020-04-06 · 85 FR 15943
Document
Document number
2020-05711
Federal Register citation
85 FR 15943
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
International Aero
Publication date
2020-03-20
Effective date
2020-04-06
FAA docket
Docket No. FAA-2020-0184
Abstract
The FAA is adopting a new airworthiness directive (AD) for all International Aero Engines, LLC (IAE) PW1122G-JM, PW1124G1-JM, PW1124G- JM, PW1127GA-JM, PW1127G1-JM, PW1127G-JM, PW1133G-JM, PW1133GA-JM, PW1130G-JM, and PW1129G-JM model turbofan engines with a certain low- pressure turbine (LPT) 3rd-stage blade installed. This AD requires initial and repetitive borescope inspections (BSI) of the turbine stator intermediate outer rear air seal (turbine piston seal) and, depending on the results of the inspection, replacement with a part eligible for installation. This AD was prompted by reports of failure of turbine piston seals leading to fracture of the LPT 3rd-stage blades. The FAA is issuing this AD to address the unsafe condition on these products.