# Proposed AD FAA-2021-0661: Pratt & Whitney Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-22-19
- Products: Pratt & Whitney
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 27, 2021, 86 FR 48080
- Comments due: October 12, 2021
- Became: [AD 2021-22-19](https://openairdocs.org/ad/2021-22-19)
- Docket: FAA-2021-0661 (https://www.regulations.gov/docket/FAA-2021-0661, where comments are filed)
- Project: AD-2020-01349-E
- FR document: 2021-18489
- Official PDF: https://openairdocs.org/files/sha256/9e/d2/9ed2da62996bc633f3ec057317cefd789c0009fbfcd8d437c9f6238780c727ea (from https://www.govinfo.gov/content/pkg/FR-2021-08-27/pdf/2021-18489.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/08/27/2021-18489/airworthiness-directives-pratt-and-whitney-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/44534B30E96493718625873E006D6E44.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0661

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2011-07-02, which applies to all Pratt & Whitney (P&W) JT8D-209, JT8D- 217, JT8D-217A, JT8D-217C, and JT8D-219 model turbofan engines. AD 2011-07-02 requires initial and repetitive torque inspections of the 3rd-stage and 4th-stage low-pressure turbine (LPT) blades. AD 2011-07- 02 also requires replacement of the LPT blade if wear limits are exceeded, replacement of the LPT-to-exhaust case bolts and nuts, and installation of crushable sleeve spacers on the bolts. Since the FAA issued AD 2011-07-02, the FAA received a report of an MD-82 airplane, equipped with a JT8D-217 engine, experiencing an engine surge that resulted in the fracture of an LPT blade. This proposed AD would retain certain requirements of AD 2011-07-02, while revising the inspection thresholds and replacement intervals for the 3rd-stage and 4th-stage LPT blades. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 27, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-18489, comments due Oct 12, 2021 (https://www.federalregister.gov/documents/2021/08/27/2021-18489/airworthiness-directives-pratt-and-whitney-turbofan-engines)

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