# AD 57-06-01: Landing Gear Lock

- 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- Superseded by: Nothing supersedes this AD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/7AE835D4B3E82CE886256A4C0044E870.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/57-06-01

## The airworthiness directive

57-06-01 COLONIAL: Applies to Model C1 Aircraft Serial Numbers 2 Through 10 Inclusive, and Serial Number 13.

Compliance required by May 1, 1957.

To prevent unwanted extension of the landing gear, a more positive lock must be installed for the landing gear selector valve lever in accordance with Colonial Service Bulletin No. 1 dated January 25, 1957.

## 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.