# Proposed AD FAA-2017-1107: Pratt & Whitney Division Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-14-10
- Products: Pratt & Whitney Division
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 15, 2017, 82 FR 59557
- Comments due: January 29, 2018
- Became: [AD 2018-14-10](https://openairdocs.org/ad/2018-14-10)
- Docket: FAA-2017-1107 (https://www.regulations.gov/docket/FAA-2017-1107, where comments are filed)
- FR document: 2017-26967
- Official PDF: https://openairdocs.org/files/sha256/22/9b/229bd703d9a24ad4450c585fb1a7bae3567f1bfb80fbc5b74d626dec2833efa7 (from https://www.govinfo.gov/content/pkg/FR-2017-12-15/pdf/2017-26967.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/12/15/2017-26967/airworthiness-directives-pratt-and-whitney-division-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/42C2CD2BE9217F8B862581F700573998.0001
- Page: https://openairdocs.org/proposed/FAA-2017-1107

## Summary

We propose to supersede Airworthiness Directive (AD) 2017-12- 03, which applies to certain Pratt & Whitney Division (PW) PW2037, PW2037M, and PW2040 turbofan engines. AD 2017-12-03 requires installing a software standard eligible for installation and precludes the use of electronic engine control (EEC) software standards earlier than SCN 5B/ I. Since we issued AD 2017-12-03, software became available for additional PW engines models. This proposed AD would require installing a software standard eligible for installation and preclude the use of EEC software standards earlier than SCN 5B/I or SCN 27A. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 15, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2017-26967, comments due Jan 29, 2018 (https://www.federalregister.gov/documents/2017/12/15/2017-26967/airworthiness-directives-pratt-and-whitney-division-turbofan-engines)

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