# AD 54-10-01: Servo Piston Shaft

- Type: Airworthiness directive
- Status: Current
- Products: Hamilton Standard Division 232, 242 and 34D
- Superseded by: Nothing supersedes this AD
- Product type: Propeller
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C5DE4F871D19F3738625696F00687B2E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/54-10-01

## The airworthiness directive

54-10-01 HAMILTON STANDARD: Applies to All Models 23260, 24260, and 34D Series Propellers Using Wedge Insert Type Low Pitch Assemblies.

Compliance required as indicated.

In order to preclude any possibility of reverse system malfunction caused by breakage of the servo piston shaft as a result of fatigue in highly stressed areas:

1. At the earliest opportunity, but not later than the first overhaul subsequent to June 1, 1954, dimensionally inspect the internal diameter of all 75361 and previous wedge insert type servo piston shafts for a maximum of 0.688 inch.

2. Magnetically inspect the stop return spring seat thread area of the shafts at the period specified in item 1 and at every overhaul subsequent to that period.

(Hamilton Standard Service Bulletin No. 287, revised March 5, 1954, covers these same inspections.)

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS P-853](https://openairdocs.org/tcds/P-853): Hamilton Standard Division; names 1 of 1 models: 232
- [TCDS P-856](https://openairdocs.org/tcds/P-856): Hamilton Standard Division; names 1 of 1 models: 34D
- [TCDS P-870](https://openairdocs.org/tcds/P-870): Hamilton Standard Division; names 1 of 1 models: 242

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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