Transportation Department Docket FAA-2020-0442 Proposed Rule

2020-11499: Airworthiness Directives; Pratt & Whitney Turbofan Engines

Comment Period Closed

Public comment closed .

Get alerted when the next rule lands

New rules open for comment on their own schedule. Pick how you want to hear about them — we email you when one appears.

Alert me on new Transportation Department rules or alert me on a subject

Publishing to members? Embed a live rule tracker on your own site — the proposed rules in your area and the comment deadlines closing on them, updating themselves. Free, one line of HTML.

Create a free account & build one →

Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Pratt & Whitney (PW) PW2037, PW2037M, PW2040, and F117-PW-100 model turbofan engines. This proposed AD was prompted by a report of an uncontained engine failure resulting from cracks in the knife edge of the high-pressure turbine (HPT) 2nd-stage air seal. This proposed AD would require initial and repetitive borescope inspections (BSIs), fluorescent penetrant inspections (FPIs), and visual inspections of the HPT 2nd-stage air seal assembly and, depending on the results of the inspections, replacement of the HPT 2nd-stage air seal assembly with a part eligible for installation. This proposed AD would also require replacement of the affected HPT 2nd-stage air seal assembly, depending on the engine model, at either the next engine shop visit or the next piece-part opportunity. The FAA is proposing this AD to address the unsafe condition on these products.

The agency’s own summary, as published.

What this changes

Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.

Don't miss the comment window

One Click Politics alerts you on every deadline, hearing, and rule change.

See all rules with comments due soon →