# AD 57-19-02: Engine Cooling Fan Assembly

- Type: Airworthiness directive
- Status: Current
- Products: Sikorsky S-58A, S-58B, S-58BT, S-58C, S-58D, S-58DT, S-58E, S-58ET, S-58F, S-58FT, S-58G, S-58H and 3 more
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Registered aircraft: 22 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C7B73AF5B87140CD86256A55006BAFE7.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/57-19-02

## The airworthiness directive

57-19-02 SIKORSKY: Applies to all Model S-58 Helicopters.

Compliance required as soon as possible but not later than October 30, 1957.

To avoid the possibility of slippage in S-58 hydromechanical clutch due to adverse tolerance conditions replace S1635-91046-1 rollers with S1635-91065 rollers.

The new rollers are three-thousandths (0.003) larger in diameter and may be identified by their dulite finish.

(Sikorsky telegraphic message SST-1-281 dated September 12, 1957, covers the same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1H11](https://openairdocs.org/tcds/1H11): Centerpointe Aerospace Inc.; names 15 of 15 models: S-58J, S-58FT, S-58C, S-58A, S-58HT, S-58F, S-58G, S-58ET…

## 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: 22 (22 by airframe model, 0 by engine model)
- Makers: Sikorsky 22

Models with the most aircraft:

- [Sikorsky S-58JT](https://openairdocs.org/model/sikorsky-s-58jt): 5 aircraft (airframe model)
- [Sikorsky S-58ET](https://openairdocs.org/model/sikorsky-s-58et): 3 aircraft (airframe model)
- [Sikorsky S-58C](https://openairdocs.org/model/sikorsky-s-58c): 3 aircraft (airframe model)
- [Sikorsky S58E](https://openairdocs.org/model/sikorsky-s58e): 3 aircraft (airframe model)
- [Sikorsky S-58J](https://openairdocs.org/model/sikorsky-s-58j): 2 aircraft (airframe model)
- [Sikorsky S-58H](https://openairdocs.org/model/sikorsky-s-58h): 2 aircraft (airframe model)
- [Sikorsky S-58B](https://openairdocs.org/model/sikorsky-s-58b): 1 aircraft (airframe model)
- [Sikorsky S-58D](https://openairdocs.org/model/sikorsky-s-58d): 1 aircraft (airframe model)
- [Sikorsky S-58BT](https://openairdocs.org/model/sikorsky-s-58bt): 1 aircraft (airframe model)
- [Sikorsky S-58DT](https://openairdocs.org/model/sikorsky-s-58dt): 1 aircraft (airframe model)

All 10 models: https://openairdocs.org/ad/57-19-02/models.md
Every aircraft: https://openairdocs.org/ad/57-19-02/aircraft.md

Its text cites no advisory circulars or STCs.

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