# AD 47-14-02: Main Landing Gear Motors

- Type: Airworthiness directive
- Status: Current
- Products: Boeing S-307, SA-307B and SA-307B-1
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E6BE383EB7AEE1708625682A0064492C.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/47-14-02

## The airworthiness directive

47-14-02 BOEING: (Was Mandatory Note 3 of AD-719-1 and Mandatory Note 3 of AD-726- 1.) Applies to 307 Series Aircraft. Compliance required prior to May 15, 1947. Inspect the attachment of the main landing gear motors to the retracting unit. Determine, by testing, that the keys in these locations have been heat treated to 200,000-220,000 pounds per square inch. All keys that do not meet this strength specification should be replaced. Aircraft which have had this attachment revised to include an additional gearbox for the hand retracting drive are not subject to this inspection. (TWA E.O. No 3489 covers this same subject.)

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-726](https://openairdocs.org/tcds/A-726): The Boeing Company; names 2 of 2 models: SA-307B-1, SA-307B
- [TCDS TC 719](https://openairdocs.org/tcds/TC%20719): The Boeing Company; names 1 of 1 models: S-307

## 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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