# Proposed AD FAA-2010-0488: Arrow Falcon Exporters, Inc. (previously Utah State University) et al. Model HH-1K, TH-1F, TH-1L, UH-1A, UH-1B, UH-1E, UH-1F, UH-1H, UH-1L, and UH-1P Helicopters; and Southwest Florida Aviation Model UH-1B (SW204 and SW204HP) and UH-1H (SW205) Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2012-14-12
- Products: Arrow Falcon Exporters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 13, 2010, 75 FR 26889
- Comments due: July 12, 2010
- Became: [AD 2012-14-12](https://openairdocs.org/ad/2012-14-12)
- Docket: FAA-2010-0488 (https://www.regulations.gov/docket/FAA-2010-0488, where comments are filed)
- Project: 2008-SW-20-AD
- FR document: 2010-11419
- Official PDF: https://openairdocs.org/files/sha256/5c/1a/5c1aa4f4685062bd5e7971f35adfae35d1e0cf082bbae4458c6f1dcea756f4cb (from https://www.govinfo.gov/content/pkg/FR-2010-05-13/pdf/2010-11419.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/05/13/2010-11419/airworthiness-directives-arrow-falcon-exporters-inc-previously-utah-state-university-et-al-model
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/830FC8E9A71D934F86257722005C1DFE.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0488

## Summary

This document proposes adopting a new airworthiness directive (AD) for the specified model helicopters. The AD would require inspecting each affected tail rotor blade (blade) forward tip weight retention block (tip block) and the aft tip closure (tip closure) for adhesive bond voids and removing any blade with an excessive void from service. This AD would also require modifying certain blades by installing shear pins and tip closure rivets. This proposal is prompted by five occurrences of missing tip blocks or tip closures resulting in minor to substantial damage to blades installed on Bell Model 212 and 412 helicopters. The actions specified by the proposed AD are intended to prevent loss of a tip block or tip closure, loss of a blade, and subsequent loss of control of the helicopter.

## Notices in this docket

- May 13, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-11419, comments due Jul 12, 2010 (https://www.federalregister.gov/documents/2010/05/13/2010-11419/airworthiness-directives-arrow-falcon-exporters-inc-previously-utah-state-university-et-al-model)

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