# Proposed AD FAA-2008-1095: Pratt & Whitney (PW) Model PW2037, PW2037(M), and PW2040 Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-02-01
- Products: Pratt & Whitney Division
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 25, 2010, 75 FR 14377
- Comments due: May 24, 2010
- Became: [AD 2012-02-01](https://openairdocs.org/ad/2012-02-01)
- Docket: FAA-2008-1095 (https://www.regulations.gov/docket/FAA-2008-1095, where comments are filed)
- Project: 2008-NE-34-AD
- FR document: 2010-6583
- Official PDF: https://openairdocs.org/files/sha256/a9/ba/a9ba2ee16fdfc30318272dff45b43dab1a27ac352e80ec02a3f8fae973cdee34 (from https://www.govinfo.gov/content/pkg/FR-2010-03-25/pdf/2010-6583.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/03/25/2010-6583/airworthiness-directives-pratt-and-whitney-pw-model-pw2037-pw2037m-and-pw2040-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/331E49710A629150862576F100515301.0001
- Page: https://openairdocs.org/proposed/FAA-2008-1095

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for PW Model PW2037, PW2037(M), and PW2040 turbofan engines. This proposed AD would require removing erosion damage on fan blades with cutback leading edges and restoring the leading edge contour. This proposed AD results from reports from PW that fan blade leading edge erosion can result in a fan thrust deterioration mode (FTDM) condition, which reduces the engine's capability of producing full rated take-off thrust. We are proposing this AD to prevent loss of engine thrust from an FTDM condition, which could result in an inability to maintain safe flight.

## Notices in this docket

- Mar 25, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-6583, comments due May 24, 2010 (https://www.federalregister.gov/documents/2010/03/25/2010-6583/airworthiness-directives-pratt-and-whitney-pw-model-pw2037-pw2037m-and-pw2040-turbofan-engines)

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