# AD 60-13-04: Rotor Shank Rod

- Type: Airworthiness directive
- Status: Current
- Products: Orlando Helicopter Airways HRS-1/CH-19, HRS-3/H-19B, S-51, S-55, S-55B and S-55C
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Registered aircraft: 17 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4B6821CDA1CAF32F86256A55006BFAE7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/60-13-04

## The airworthiness directive

60-13-04 SIKORSKY: Amdt. 171 Part 507 Federal Register June 24, 1960. Applies to All Models S-51 and S-55 Helicopters.

Compliance required by August 15, 1960.

A fatigue failure of the RE5M7 shank rod end bearing has occurred in the S-55 main rotor upper controls. This rod had a hollow shank rather than a solid shank and is not an approved part. Preliminary investigation indicates that the hollow shank part has been installed in S-51 and S-55 helicopters because of improper identification. To ensure removal of this part from service, the following must be accomplished:

Unless already accomplished, remove the following rod assemblies and inspect for RE5M7 rod end bearings with hollow shanks and S510085 pivots with hollow shanks, as noted (S510085 pivots are altered RE5M7 rod ends.)

  (a) Model S-51 main rotor assembly, P/N S510000.

  (1) P/N S510333 (Alternate P/N S510140) rod assembly contains one RE5M7 rod end.

  (2) P/N S510082 rod assembly contains one RE5M7 rod end and one P/N S510085 pivot.

  (b) Model S-51 main rotor assembly, P/N S10-10-1100.

  (1) P/N S510333 rod assembly contains one RE5M7 rod end.

  (c) Model S-55 servo unit assembly, P/N S14-40-5000.

  (1) P/N S14-40-5024 control arm contains one RE5M7 rod end.

Remove all hollow shank units and replace with solid shank units.

## Affected data sheets (3) (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
- [TCDS H-2](https://openairdocs.org/tcds/H-2): Sikorsky Aircraft Corporation; names 1 of 1 models: S-51

## 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/60-13-04/models.md
Every aircraft: https://openairdocs.org/ad/60-13-04/aircraft.md

Its text cites no advisory circulars or STCs.

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