# Proposed AD FAA-2016-9405: Pratt & Whitney Division Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2017-12-03
- Products: Pratt & Whitney Division
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 5, 2017, 82 FR 1265
- Comments due: February 21, 2017
- Became: [AD 2017-12-03](https://openairdocs.org/ad/2017-12-03)
- Docket: FAA-2016-9405 (https://www.regulations.gov/docket/FAA-2016-9405, where comments are filed)
- Project: 2016-NE-22-AD
- FR document: 2016-31870
- Official PDF: https://openairdocs.org/files/sha256/b0/59/b05969fff2673983f22df8c2e8f4370760480d30a74f24ccc87b6f1a30c6ff7c (from https://www.govinfo.gov/content/pkg/FR-2017-01-05/pdf/2016-31870.pdf)
- Federal Register: https://www.federalregister.gov/documents/2017/01/05/2016-31870/airworthiness-directives-pratt-and-whitney-division-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1D573678EB1CE0F98625809F005700ED.0001
- Page: https://openairdocs.org/proposed/FAA-2016-9405

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Division (PW) PW2037, PW2037M, and PW2040 turbofan engines. This proposed AD was prompted by an unrecoverable engine in-flight shutdown (IFSD) after an ice crystal icing event. This proposed AD would require installing a software standard eligible for installation and preclude the use of electronic engine control (EEC) software standards earlier than SCN 5B/I. We are proposing this AD to correct the unsafe condition on these products.

## Notices in this docket

- Jan 5, 2017: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-31870, comments due Feb 21, 2017 (https://www.federalregister.gov/documents/2017/01/05/2016-31870/airworthiness-directives-pratt-and-whitney-division-turbofan-engines)

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