# AD 55-03-01: Elevator Servo Tab

- Type: Airworthiness directive
- Status: Current
- Products: Kelowna Flightcraft R & D 340
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Registered aircraft: 7 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5E3CA5C914A0A027862569AB006DE458.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/55-03-01

## The airworthiness directive

55-03-01 CONVAIR: Applies to All Model 340 Aircraft.

Compliance required as indicated.

A 340 was involved in a flight accident due to the AN 310-4 nut coming off of the AN 174-33 bolt that attaches the left-hand elevator servo tab idler to the structure resulting in flutter of the elevator servo tab, with subsequent failures at the elevator control system and loss of elevator control. As a precautionary measure, the following is required: As soon as practical but not later then the next 15 hours service, inspect the control systems for the servo tab on the left elevator and on the right elevator trim tab on all 340 aircraft. Inspection is to cover all nuts, bolts, idlers, bellcranks, pushrods and general security check of all nuts and bolts.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 6A6](https://openairdocs.org/tcds/6A6): Kelowna Flightcraft R & D Ltd.; names 1 of 6 models: 340

## 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: 7 (7 by airframe model, 0 by engine model)
- Makers: Convair 7

Models with the most aircraft:

- [Convair 340](https://openairdocs.org/model/convair-340): 7 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/55-03-01/models.md
Every aircraft: https://openairdocs.org/ad/55-03-01/aircraft.md

Its text cites no advisory circulars or STCs.

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