# Proposed AD FAA-2013-0478: Agusta S.p.A. (Type Certificate Currently Held by AgustaWestland S.p.A.) Helicopters (Agusta)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2014-02-08
- Products: Agusta
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 5, 2013, 78 FR 33768
- Comments due: August 5, 2013
- Became: [AD 2014-02-08](https://openairdocs.org/ad/2014-02-08)
- Docket: FAA-2013-0478 (https://www.regulations.gov/docket/FAA-2013-0478, where comments are filed)
- Project: 2012-SW-092-AD
- FR document: 2013-13293
- Official PDF: https://openairdocs.org/files/sha256/2f/a6/2fa6c5634cb851d5cccd516e0cc2dbdb013fd9bd248ff2f9c00d7efa89c850fa (from https://www.govinfo.gov/content/pkg/FR-2013-06-05/pdf/2013-13293.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/06/05/2013-13293/airworthiness-directives-agusta-spa-type-certificate-currently-held-by-agustawestland-spa
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DA3C74C93DF4547786257B81004A3B22.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0478

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Agusta Model A109C, A109E, A109S, A109K2, and AW109SP helicopters. This proposed AD would require inspecting the lock wires securing the tail rotor (T/R) duplex bearing locking nut (locking nut) to determine whether any lock wires are missing or damaged. This proposed AD is prompted by reports of loosening T/R locking nuts, which if not corrected, could result in failure of the T/R and subsequent loss of control of the helicopter.

## Notices in this docket

- Jun 5, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-13293, comments due Aug 5, 2013 (https://www.federalregister.gov/documents/2013/06/05/2013-13293/airworthiness-directives-agusta-spa-type-certificate-currently-held-by-agustawestland-spa)

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