# Proposed AD FAA-2013-0021: Eurocopter Deutschland GmbH Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Eurocopter Deutschland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 1, 2013, 78 FR 7312
- Comments due: April 2, 2013
- Docket: FAA-2013-0021 (https://www.regulations.gov/docket/FAA-2013-0021, where comments are filed)
- Project: 2010-SW-040-AD
- FR document: 2013-02245
- Official PDF: https://openairdocs.org/files/sha256/08/c3/08c33e4f9514d4e89ee0b773d676890b86c95720a71790ad35f4bd61d7c6a93a (from https://www.govinfo.gov/content/pkg/FR-2013-02-01/pdf/2013-02245.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/02/01/2013-02245/airworthiness-directives-eurocopter-deutschland-gmbh-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B2DE986ECBD3850B86257B050051C4DD.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0021

## Summary

We propose to adopt a new airworthiness directive (AD) for the Eurocopter Deutschland GmbH (Eurocopter) Model MBB-BK 117 C-2 helicopters. This proposed AD would require changing the direction of the bolt connecting the upper clevis bolt of a specific bellcrank in the main rotor assembly, repetitively inspecting the bearings in the bellcrank assemblies for correct staking, and replacing a bellcrank if a bearing is staked incorrectly. This proposed AD is prompted by improperly staked bellcrank bearings, which may cause the bellcrank to shift in the axial direction and cause chafing. The proposed actions are intended to prevent contact between the bolts on certain main rotor bellcranks, which could result in chafing and subsequent loss of control of the helicopter.

## Notices in this docket

- Feb 1, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-02245, comments due Apr 2, 2013 (https://www.federalregister.gov/documents/2013/02/01/2013-02245/airworthiness-directives-eurocopter-deutschland-gmbh-helicopters)

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