# Airworthiness Directives; Sikorsky Model S-70A and S-70C Helicopters
> **Rule** · Final rule; request for comments. · Published 2002-06-07 · Effective 2002-06-24 · 67 FR 39267
## Document
- **Document number:** 02-14249
- **Category:** airworthiness
- **Manufacturer:** Sikorsky Model S-70A and S-70C
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 67 FR 39267
- **Publication date:** 2002-06-07
- **Effective date:** 2002-06-24
- **FAA docket:** Docket No. 2002-SW-10-AD
## Abstract

This amendment supersedes an existing airworthiness directive (AD) for Sikorsky Model S-70A and S-70C helicopters. That AD currently requires inspecting a certain part-numbered main landing gear drag beam (beam) for a crack, removing any cracked beam before further flight, and reducing the torque of the jackpad mounting bolt retention nut (nut) of each beam. This amendment contains the same actions but requires those actions for another beam part number (P/N). This amendment is prompted by the inadvertent omission in the current AD of the additional beam that is susceptible to failure due to stress corrosion resulting from sustained excessive tensile stress due to excessive torque of the nut. The actions specified by this AD are intended to prevent excessive torque of the nut, failure of a beam, and subsequent loss of control of the helicopter during takeoff or landing.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2002/06/07/02-14249/airworthiness-directives-sikorsky-model-s-70a-and-s-70c-helicopters)
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