Airworthiness Directives; Pratt & Whitney Engines

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Sept. 17, 2026. Document 2026-19094. Updated Nov. 5, 2026.

What it does

The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney (PW) Model PW1519G, PW1521G, PW1521GA, PW1521G- 3, PW1524G, PW1524G-3, PW1525G, PW1525G-3, PW1919G, PW1919G-RC, PW1921G, PW1921G-RC, PW1922G, PW1923G, and PW1923G-A engines with a certain high-pressure compressor (HPC) module installed. This proposed AD was prompted by six reports of clashing found on either the HPC 2nd stage rotor or 3rd stage rotor caused by contact with the corresponding HPC variable stator vanes (VSV). This proposed AD would require initial and repetitive borescope inspections (BSIs) of the HPC 1st stage, 2nd stage, and 3rd stage rotor rear rim surfaces for evidence of wear, scratching, or contact with the corresponding HPC VSV inner locating ring and, depending on the results, removal from service and replacement. This proposed AD would also require replacement of the HPC VSV bushing set as terminating action to the initial and repetitive BSIs of the HPC 1st stage, 2nd stage, and 3rd stage rotor rear rim surfaces. The FAA is proposing this AD to address the unsafe condition on these products.

The Federal Aviation Administration's summary, as published in the Federal Register.

What it would change

1 part of Title 14 of the Code of Federal Regulations:

14 CFR 39

Before this

1002 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.

Sept. 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; Airbus SAS Airplanes
Sept. 17, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
Sept. 17, 2026 Final rule. Airworthiness Directives; Airbus SAS Airplanes
Sept. 17, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
Sept. 17, 2026 Final rule. Airworthiness Directives; The Boeing Company Airplanes
Sept. 17, 2026 Final rule. Airworthiness Directives; Bell Textron Canada Limited Helicopters
Sept. 16, 2026 Notice of proposed rulemaking (NPRM). Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
Sept. 15, 2026 Final rule. Airworthiness Directives; MD Helicopters, LLC Helicopters

Since then:

What happens next and when

The FAA must receive comments on this proposed AD by October 19, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-19094
Action	Notice of proposed rulemaking (NPRM).
Agencies	Transportation Department; Federal Aviation Administration
Published	Sept. 17, 2026
Comments close	Oct. 19, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-8816

Source: the Federal Register (public domain). The document in the Federal Register