# Proposed AD FAA-2016-5423: Pratt & Whitney Division Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-22-05
- Products: Pratt & Whitney Division
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 20, 2016, 81 FR 23217
- Comments due: June 20, 2016
- Became: [AD 2016-22-05](https://openairdocs.org/ad/2016-22-05)
- Docket: FAA-2016-5423 (https://www.regulations.gov/docket/FAA-2016-5423, where comments are filed)
- Project: 2016-NE-09-AD
- FR document: 2016-09122
- Official PDF: https://openairdocs.org/files/sha256/ce/e2/cee25fbbb22057eafa2be6676ad72e5bd8b2609d387e2b195e01f967230a266d (from https://www.govinfo.gov/content/pkg/FR-2016-04-20/pdf/2016-09122.pdf)
- Federal Register: https://www.federalregister.gov/documents/2016/04/20/2016-09122/airworthiness-directives-pratt-and-whitney-division-turbofan-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4F093AE7B11A115886257F9B004AD427.0001
- Page: https://openairdocs.org/proposed/FAA-2016-5423

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Pratt & Whitney (PW) PW4164, PW4164-1D, PW4168, PW4168-1D, PW4168A, PW4168A-1D, and PW4170 turbofan engines. This proposed AD was prompted by several instances of fuel leaks on PW engines installed with the Talon IIB combustion chamber configuration. This proposed AD would require initial and repetitive inspections of the affected fuel nozzles and their replacement with parts eligible for installation. We are proposing this AD to prevent failure of the fuel nozzles, which could lead to engine fire and damage to the airplane.

## Notices in this docket

- Apr 20, 2016: Notice of proposed rulemaking (NPRM). (first notice), FR document 2016-09122, comments due Jun 20, 2016 (https://www.federalregister.gov/documents/2016/04/20/2016-09122/airworthiness-directives-pratt-and-whitney-division-turbofan-engines)

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