# Proposed AD FAA-2020-0064: MD Helicopters Inc., Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-11-07
- Products: MD Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 7, 2020, 85 FR 7256
- Comments due: March 23, 2020
- Became: [AD 2020-11-07](https://openairdocs.org/ad/2020-11-07)
- Docket: FAA-2020-0064 (https://www.regulations.gov/docket/FAA-2020-0064, where comments are filed)
- FR document: 2020-02450
- Official PDF: https://openairdocs.org/files/sha256/82/4a/824a11b05d0ac84bde96bc12bbb77368938bbb2c820c8568f52c5c9ac8c8c15c (from https://www.govinfo.gov/content/pkg/FR-2020-02-07/pdf/2020-02450.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/02/07/2020-02450/airworthiness-directives-md-helicopters-inc-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/77CBCC1A8EBDDBBD862585070053AF21.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0064

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for MD Helicopters Inc., (MDHI) Model 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD was prompted by a report of non-conforming main rotor (M/R) hub lead-lag bolts (bolts). This proposed AD would require removing certain bolts from service. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Feb 7, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-02450, comments due Mar 23, 2020 (https://www.federalregister.gov/documents/2020/02/07/2020-02450/airworthiness-directives-md-helicopters-inc-helicopters)

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