# Proposed AD FAA-2013-1009: Pratt & Whitney Canada Corp. Turboprop Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-11-05
- Products: Pratt & Whitney Canada
- Product type: Engine
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 7, 2014, 79 FR 763
- Comments due: March 10, 2014
- Became: [AD 2014-11-05](https://openairdocs.org/ad/2014-11-05)
- Docket: FAA-2013-1009 (https://www.regulations.gov/docket/FAA-2013-1009, where comments are filed)
- Project: 2013-NE-35-AD
- FR document: 2014-00029
- Official PDF: https://openairdocs.org/files/sha256/fb/e7/fbe7a9fbbe42fbd4619f5df8f650b72cdc9953a95355655eca73ef166ab74725 (from https://www.govinfo.gov/content/pkg/FR-2014-01-07/pdf/2014-00029.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/01/07/2014-00029/airworthiness-directives-pratt-and-whitney-canada-corp-turboprop-engines
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A8C0111D44AA08AF86257C590059AE11.0001
- Page: https://openairdocs.org/proposed/FAA-2013-1009

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Canada Corp. (P&WC) turboprop engines. This proposed AD was prompted by in-service events involving the perforation of engine cases as a result of the liberation of power turbine (PT) blades and the fracture/displacement of the PT containment ring. This proposed AD would require installing a reinforcement liner to the PT containment ring and, for certain PT containment rings, adding scallops. We are proposing this AD to prevent uncontained engine failure and damage to the airplane.

## Notices in this docket

- Jan 7, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-00029, comments due Mar 10, 2014 (https://www.federalregister.gov/documents/2014/01/07/2014-00029/airworthiness-directives-pratt-and-whitney-canada-corp-turboprop-engines)

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