# AD 86-14-07: Push Rod Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Sikorsky S-76A and S-76B
- Effective: October 20, 1986
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-5432
- Registered aircraft: 53 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D2C5E4146A4994CD86256A4D00742249.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/86-14-07

## The airworthiness directive

86-14-07 SIKORSKY AIRCRAFT: Amendment 39-5432. Applies to all Model S-76A helicopters certificated in any category and model S-76B helicopters, serial numbers 760262, 760269, 760299, 760303, and 760310 through 760319, certificated in any category.

Compliance is required as indicated, unless already accomplished.

To prevent operation with a failed pilot's yaw control rod assembly, P/N 76400-00034-041, accomplish the following:

  (a) Prior to further flight, inspect the push rod assembly in accordance with Section E, paragraph 1, of Sikorsky Alert Service Bulletin (ASB) No. 76-ASB-76-67-22A, dated July 7, 1986, or an FAA-approved equivalent. If no dent, crack, distortion, or bowing is detected in the rod, install a placard legible to the pilot and in full view of the pilot stating "single pilot operation prohibited." This placard is to remain until the inspection required by paragraph (b) below is accomplished.

  (b) Within the next 25 hours' time in service afterthe effective date of this AD, inspect the push rod assembly for condition of heat treat in accordance with Section E, paragraph 2, of Sikorsky ASB No. 76-ASB-76-67-22A, dated July 7, 1986, or an FAA-approved equivalent.

  (c) If as a result of the inspection of paragraph (a), a dent, crack, distortion, or bowing is detected or if as a result of the inspection of paragraph (b) above, the heat treat (hardness) is incorrect, replace the rod assembly with a new or serviceable component that complies with this AD prior to further flight.

  (d) Aircraft may be ferried in accordance with the provision of FAR Sections 21.197 and 21.199 to a base where the requirements of the AD can be accomplished.

  (e) Upon request, an alternate method of compliance which provides an equivalent level of safety with the requirements of this AD may be approved by the Manager, Boston Aircraft Certification Office, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803, telephone (617) 273-7118.

Sikorsky Aircraft ASB No. 76-ASB-76-67-22A identified and described in this document, is incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received this document from the manufacturer may obtain copies upon request to Sikorsky Aircraft, Division of United Technologies, North Main Street, Stratford, Connecticut 06601. This document also may be examined at the Rules Docket, Office of the Regional Counsel, Federal Aviation Administration, Southwest Region, 4400 Blue Mound Road, Fort worth, Texas, 76106.

This amendment becomes effective October 20, 1986, as to all persons except those to whom it was made immediately effective by individual priority letter AD No. 86-14-07 issued July 9, 1986, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H1NE](https://openairdocs.org/tcds/H1NE): Sikorsky Aircraft Corporation; names 2 of 4 models: S-76B, S-76A

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 53 (53 by airframe model, 0 by engine model)
- Makers: Sikorsky 53

Models with the most aircraft:

- [Sikorsky S-76B](https://openairdocs.org/model/sikorsky-s-76b): 34 aircraft (airframe model)
- [Sikorsky S-76A](https://openairdocs.org/model/sikorsky-s-76a): 19 aircraft (airframe model)

All 2 models: https://openairdocs.org/ad/86-14-07/models.md
Every aircraft: https://openairdocs.org/ad/86-14-07/aircraft.md

Its text cites no advisory circulars or STCs.

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