# Proposed AD FAA-2014-1020: Sikorsky Aircraft Corporation (Type Certificate Previously Held by Schweizer Aircraft Corporation) Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-11-09
- Products: Sikorsky
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 15, 2014, 79 FR 74037
- Comments due: February 13, 2015
- Became: [AD 2015-11-09](https://openairdocs.org/ad/2015-11-09)
- Docket: FAA-2014-1020 (https://www.regulations.gov/docket/FAA-2014-1020, where comments are filed)
- Project: 2013-SW-078-AD
- FR document: 2014-29260
- Official PDF: https://openairdocs.org/files/sha256/ab/0f/ab0f8d74699e66f1334a06a924db530ad35d6fcbe2755ae078b8614b2b4e81f0 (from https://www.govinfo.gov/content/pkg/FR-2014-12-15/pdf/2014-29260.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/12/15/2014-29260/airworthiness-directives-sikorsky-aircraft-corporation-type-certificate-previously-held-by-schweizer
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/41198C3966550FAB86257DAF004CA242.0001
- Page: https://openairdocs.org/proposed/FAA-2014-1020

## Summary

We propose to adopt a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (type certificate previously held by Schweizer Aircraft) (Sikorsky) Model 269D and Model 269D Configuration A helicopters. This proposed AD would require reducing the life limit of the ring gear carrier assembly. This proposed AD is prompted by cracks in the ring gear carrier assembly. The proposed actions are intended to reduce the life of the ring gear carrier assembly to prevent failure of the main rotor transmission, loss of engine power to the main rotor, and subsequent loss of control of the helicopter.

## Notices in this docket

- Dec 15, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-29260, comments due Feb 13, 2015 (https://www.federalregister.gov/documents/2014/12/15/2014-29260/airworthiness-directives-sikorsky-aircraft-corporation-type-certificate-previously-held-by-schweizer)

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