# Proposed AD FAA-2019-0759: Various Experimental and Restricted Category Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-15-14
- Products: Various Experimental and Restricted Category Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 31, 2019, 84 FR 58341
- Comments due: December 16, 2019
- Became: [AD 2021-15-14](https://openairdocs.org/ad/2021-15-14)
- Docket: FAA-2019-0759 (https://www.regulations.gov/docket/FAA-2019-0759, where comments are filed)
- FR document: 2019-23686
- Official PDF: https://openairdocs.org/files/sha256/4f/76/4f7675db31a9031e8ed5d65438dfe7c3d5fb9569411eeb76dc465450153a7e6a (from https://www.govinfo.gov/content/pkg/FR-2019-10-31/pdf/2019-23686.pdf)
- Federal Register: https://www.federalregister.gov/documents/2019/10/31/2019-23686/airworthiness-directives-various-experimental-and-restricted-category-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/90F499068297BFD3862584A40046EEFF.0001
- Page: https://openairdocs.org/proposed/FAA-2019-0759

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for various helicopters operating under experimental airworthiness certificates and various type certificated restricted category helicopters. This proposed AD was prompted by multiple accidents and incidents involving failure of the tail boom attachment structure and bolts. This proposed AD would require revising the Rotorcraft Flight Manual (RFM) for your helicopter to incorporate pre-flight checks; removing paint and sealant, and cleaning; repetitive inspections of structural components that attach the tail boom to the fuselage; and depending on the outcome of the inspections, repairing or replacing components, or re-bonding the structure. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 31, 2019: Notice of proposed rulemaking (NPRM). (first notice), FR document 2019-23686, comments due Dec 16, 2019 (https://www.federalregister.gov/documents/2019/10/31/2019-23686/airworthiness-directives-various-experimental-and-restricted-category-helicopters)

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