# Proposed AD FAA-2024-2011: MD Helicopters, LLC, Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2024-23-06
- Products: MD Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 8, 2024, 89 FR 64834
- Comments due: September 23, 2024
- Became: [AD 2024-23-06](https://openairdocs.org/ad/2024-23-06)
- Docket: FAA-2024-2011 (https://www.regulations.gov/docket/FAA-2024-2011, where comments are filed)
- Project: AD-2023-01121-R
- FR document: 2024-17339
- Official PDF: https://openairdocs.org/files/sha256/b2/aa/b2aa3e879e310867b39aa002de0de56a2c37823fe35da594649a6f6bfe8660d9 (from https://www.govinfo.gov/content/pkg/FR-2024-08-08/pdf/2024-17339.pdf)
- Federal Register: https://www.federalregister.gov/documents/2024/08/08/2024-17339/airworthiness-directives-md-helicopters-llc-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2024-17339-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2024-2011

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain MD Helicopters, LLC (MDHI), Model 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD was prompted by a report of a seized and damaged roller bearing in the pilot interconnecting cyclic torque tube (torque tube) assembly. This proposed AD would require repetitively inspecting the torque tube assembly for corrosion and cracks and the roller bearings for corrosion and degradation. This proposed AD would also require repetitively inspecting the torque tube assembly for freedom- of-movement. Depending on the results, this proposed AD would require replacing parts or accomplishing additional inspections. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 8, 2024: Notice of proposed rulemaking (NPRM). (first notice), FR document 2024-17339, comments due Sep 23, 2024 (https://www.federalregister.gov/documents/2024/08/08/2024-17339/airworthiness-directives-md-helicopters-llc-helicopters)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.