federal_register: 01-31556
Data license: Public Domain (U.S. Government data) · Data source: Federal Register API & Regulations.gov API
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| document_number | title | type | abstract | publication_date | pub_year | pub_month | html_url | pdf_url | agency_names | agency_ids | excerpts |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 01-31556 | Airworthiness Directives; MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF Helicopters | Proposed Rule | This document proposes the adoption of a new airworthiness directive (AD) for MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF helicopters with a tailboom modified according to Aerometals supplemental type certificate (STC) SH5055NM or SH4801NM. The AD would require an inspection to identify the part number (P/N) of the bolts that attach the tail rotor gearbox to the tailboom and replacing any bolt of inadequate grip length with an airworthy bolt. This AD would also require determining the number of bolt threads protruding from each nutplate and adding an additional washer if more than four threads protrude. This proposal is prompted by the discovery that bolts of inadequate grip length were specified to attach the tail rotor gearbox to the tailboom. The actions specified by the proposed AD are intended to prevent loss of a tail rotor gearbox due to bolts of inadequate grip length and subsequent loss of control of the helicopter. | 2001-12-27 | 2001 | 12 | https://www.federalregister.gov/documents/2001/12/27/01-31556/airworthiness-directives-md-helicopters-inc-model-369d-369e-369f-and-369ff-helicopters | https://www.govinfo.gov/content/pkg/FR-2001-12-27/pdf/01-31556.pdf | Transportation Department; Federal Aviation Administration | 492,159 | This document proposes the adoption of a new airworthiness directive (AD) for MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF helicopters with a tailboom modified according to Aerometals supplemental type certificate (STC) SH5055NM or SH4801NM.... |