# AD 57-13-01: Engine Strut Fittings

- Type: Airworthiness directive
- Status: Current
- Products: Revo Colonial C-1
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/95EA447DCBC6151E86256A4C0044EF01.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/57-13-01

## The airworthiness directive

57-13-01 COLONIAL: Applies to All Model C-1 Aircraft.

Compliance required within next 10 hours of operation or July 15, 1957, whichever occurs first unless already accomplished, and every 100 hours' operation thereafter.

Inspect with 10-power glass the engine pylon side strut attaching fittings (P/N 3208-10) for cracks in the weld areas. (Inspection may be readily accomplished after removal of the fairing cuff, P/N 5400-33.) Fittings with cracks originating across the edge may be salvaged for use if the crack can be removed by grinding to a maximum depth of 1/16 inch measured in from the edge. Fittings with cracks located in areas other than the edge or in excess of the salvage limits must be replaced.

(Colonial Service Bulletin No. 4 revision 1 dated May 22, 1957, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A13](https://openairdocs.org/tcds/1A13): Revo Incorporated; names 1 of 7 models: Colonial C-1

## 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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