# Proposed AD FAA-2020-0847: Airbus Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-04-13
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 21, 2020, 85 FR 59217
- Comments due: November 5, 2020
- Became: [AD 2021-04-13](https://openairdocs.org/ad/2021-04-13)
- Docket: FAA-2020-0847 (https://www.regulations.gov/docket/FAA-2020-0847, where comments are filed)
- FR document: 2020-20631
- Official PDF: https://openairdocs.org/files/sha256/3b/83/3b83fbed4b077fffd566fc5ef9a375d429e488e30b8efdffe162f56b744048a1 (from https://www.govinfo.gov/content/pkg/FR-2020-09-21/pdf/2020-20631.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/09/21/2020-20631/airworthiness-directives-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C112F4CF8F52371A862585EA004A7A8C.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0847

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, and AS350D helicopters; Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters; and Model EC130 B4 and EC130 T2 helicopters. This proposed AD was prompted by a report of a missing retaining ring of the inner race of the main rotor mast (MRM) upper bearing. This proposed AD would require a one-time inspection to verify the presence and correct installation of the MRM upper bearing retaining rings, a repetitive inspection of the sealant bead on the MRM for damage, and corrective actions if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 21, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-20631, comments due Nov 5, 2020 (https://www.federalregister.gov/documents/2020/09/21/2020-20631/airworthiness-directives-airbus-helicopters)

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