# Proposed AD FAA-2014-0105: Airbus Helicopters (Previously Eurocopter France) (Airbus Helicopters) Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-12-13
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 16, 2015, 80 FR 34335
- Comments due: August 17, 2015
- Became: [AD 2016-12-13](https://openairdocs.org/ad/2016-12-13)
- Docket: FAA-2014-0105 (https://www.regulations.gov/docket/FAA-2014-0105, where comments are filed)
- Project: 2008-SW-58-AD
- FR document: 2015-14282
- Official PDF: https://openairdocs.org/files/sha256/80/ac/80ac050106bbdf049e2a8deb274c751ce879932bef985d80552bc58241b6ff06 (from https://www.govinfo.gov/content/pkg/FR-2015-06-16/pdf/2015-14282.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/06/16/2015-14282/airworthiness-directives-airbus-helicopters-previously-eurocopter-france-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/87D096EA312D36F086257E660048606D.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0105

## Summary

This document proposes superseding Airworthiness Directives (AD) 2000-05-17 and AD 2001-04-12, which apply to Eurocopter France (now Airbus Helicopters) Model EC120B helicopters. AD 2000-05-17 and AD 2001-04-12 require repetitive visual checks of the engine-to-main gearbox (MGB) coupling tube assembly (coupling tube) for a crack and replacing any cracked tube with an airworthy tube. This proposed AD would require removing certain engine mount parts from service, measuring the height of the engine mounting base for certain helicopters, replacing the engine mount if a certain height is exceeded, inspecting the flared coupling on certain helicopters for a crack, and replacing the coupling if it is cracked. Since we issued AD 2000-05-17 and AD 2001-04-12, there have been reports of additional cracks in coupling tubes. The proposed actions are intended to prevent coupling tube failure, loss of engine drive, and a subsequent forced landing of the helicopter.

## Notices in this docket

- Jun 16, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-14282, comments due Aug 17, 2015 (https://www.federalregister.gov/documents/2015/06/16/2015-14282/airworthiness-directives-airbus-helicopters-previously-eurocopter-france-airbus-helicopters)

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