# Proposed AD FAA-2013-0556: Erickson Air-Crane Incorporated Helicopters (Type Certificate previously Held by Sikorsky Aircraft Corporation)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-23-07
- Products: Erickson Air-Crane
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 3, 2013, 78 FR 40063
- Comments due: September 3, 2013
- Became: [AD 2013-23-07](https://openairdocs.org/ad/2013-23-07)
- Docket: FAA-2013-0556 (https://www.regulations.gov/docket/FAA-2013-0556, where comments are filed)
- Project: 2007-SW-30-AD
- FR document: 2013-15954
- Official PDF: https://openairdocs.org/files/sha256/13/8f/138faa9046f6cc759db73bd785919344ccdae17b0710664db1650802fe3fb9fb (from https://www.govinfo.gov/content/pkg/FR-2013-07-03/pdf/2013-15954.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/07/03/2013-15954/airworthiness-directives-erickson-air-crane-incorporated-helicopters-type-certificate-previously
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7A425A81C1BBD4B886257B9D004D3210.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0556

## Summary

We propose to supersede an existing airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-64E helicopters. The existing AD requires checks of the main rotor blades for a crack. This proposed AD would retain the actions of the existing AD, would reflect that the type certificate (TC) for this model helicopter has been transferred to Erickson Air-Crane Incorporated (Erickson), and expand the applicability to include the similar Erickson Model S-64F helicopters. This proposed AD is prompted by a need to expand the applicability to include Model S-64F helicopters and clarify the applicable main rotor blades by part number. The proposed actions are intended to detect a crack in the main rotor blade and prevent blade separation and subsequent loss of control of the helicopter.

## Notices in this docket

- Jul 3, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-15954, comments due Sep 3, 2013 (https://www.federalregister.gov/documents/2013/07/03/2013-15954/airworthiness-directives-erickson-air-crane-incorporated-helicopters-type-certificate-previously)

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