# AD 67-29-07: Azimuth Control Rod Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Orlando Helicopter Airways HRS-1/CH-19, HRS-3/H-19B, S-55, S-55B and S-55C
- Effective: November 3, 1967
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-504
- Registered aircraft: 17 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E7681EBDF8EB434786256A4D005058CB.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/67-29-07

## The airworthiness directive

67-29-07 SIKORSKY: Amdt. 39-504 Part 39 Federal Register November 3, 1967. Applies to Type S-55 Helicopters equipped with Wright R-1300 engines (Restricted and Normal Category).

Compliance required as indicated.

To prevent fatigue failure of the azimuth control rod assembly, P/N S1440-2105-1, accomplish the following:

  (a) Remove from service all control rod assemblies, P/N S1440-2105-1, with 725 or more hours' time in service on the effective date of this AD within the next 25 hours' time in service.

  (b) Remove from service all other control rod assemblies P/N S1440-2105-1, before the accumulation of 750 hours' time in service.

  (c) Within the next 15 hours' time in service after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 50 hours' time in service from the last inspection, inspect the control rod assembly in accordance with paragraph B of Sikorsky Service Bulletin No. 55B40-5, dated October 18, 1967, or later revisions approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Eastern Region. Equivalent inspections may be approved by an FAA maintenance inspector.

This amendment effective November 3, 1967.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1H4](https://openairdocs.org/tcds/1H4): Centerpointe Aerospace Inc.; names 3 of 3 models: S-55C, S-55, S-55B
- [TCDS HR1SO](https://openairdocs.org/tcds/HR1SO): Orlando Helicopter Airways Inc.; names 2 of 10 models: HRS-3/H-19B, HRS-1/CH-19

## 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: 17 (17 by airframe model, 0 by engine model)
- Makers: Sikorsky 15, Sikorsky/Orlando 1, Sikorsky/Vertical 1

Models with the most aircraft:

- [Sikorsky S-55B](https://openairdocs.org/model/sikorsky-s-55b): 9 aircraft (airframe model)
- [Sikorsky S-55](https://openairdocs.org/model/sikorsky-s-55): 3 aircraft (airframe model)
- [Sikorsky S55B](https://openairdocs.org/model/sikorsky-s55b): 3 aircraft (airframe model)
- [Sikorsky/Orlando S-55](https://openairdocs.org/model/sikorsky-orlando-s-55): 1 aircraft (airframe model)
- [Sikorsky/Vertical S-55](https://openairdocs.org/model/sikorsky-vertical-s-55): 1 aircraft (airframe model)

All 5 models: https://openairdocs.org/ad/67-29-07/models.md
Every aircraft: https://openairdocs.org/ad/67-29-07/aircraft.md

Its text cites no advisory circulars or STCs.

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