# AD 50-04-02: Landing Gear Retraction Motor

- Type: Airworthiness directive
- Status: Current
- Products: Superior V and V-2
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 11 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EEC68D19217830D286256A56006ABBB9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/50-04-02

## The airworthiness directive

50-04-02 SUPERIOR (Culver): Applies to All Model V, Serial V-3 Through V-357 and Model V2, Serial V2-503 Through V2-517 Not Previously Modified in Accordance With Superior Service Bulletin No. 18.

Compliance required at the next 100-hour inspection but not later than February 1, 1951.

The teeth of the final pinion, P/N 10528, in the gear reduction train of the landing gear retraction motor have inadequate strength to sustain the shock loads due to abrupt reversal of the landing gear retraction switch and to maladjusted limit switches. As stripping of these teeth makes the emergency extension system inoperative, gears 10528 and 10529 should be replaced with gears 11520 and 11521 which have stronger teeth and are obtainable from the Superior Aircraft Co., University Airport, 2501 North Hillside, Wichita 25, Kansas.

(Superior Service Bulletin No. 18 dated November 19, 1947, covers this same subject.)

This supersedes AD 48-05-02, and eliminates placard installation provisions.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-778](https://openairdocs.org/tcds/A-778): Superior Aircraft Company; names 2 of 2 models: V-2, V

## 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: 11 (11 by airframe model, 0 by engine model)
- Makers: Culver 11

Models with the most aircraft:

- [Culver V](https://openairdocs.org/model/culver-v): 11 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/50-04-02/models.md
Every aircraft: https://openairdocs.org/ad/50-04-02/aircraft.md

Its text cites no advisory circulars or STCs.

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