# AD 56-15-03: Elevator Control System

- Type: Airworthiness directive
- Status: Current
- Products: Scotts-Bell 47 47H-1
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0DAE5C14F70BC33A86256A34004F8E89.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/56-15-03

## The airworthiness directive

56-15-03 BELL: Applies to Model 47H1 Helicopters, Serial Numbers 1347 Through 1349 and 1351 Through 1371. Compliance required as soon as possible but not later than August 15, 1956.

Failure of a control cable of the synchronized elevator control system can result in loss of control of the helicopter. Installation of the fail safe synchronized elevator centering spring, Bell Kit No. 47-2573-1, is mandatory and provides a self-centering device for the synchronized elevator so that control of the helicopter can be maintained in event of elevator control cable failure.

(Bell Mandatory Service Bulletin No. 109 dated June 15, 1956, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H-1](https://openairdocs.org/tcds/H-1): Scott's-Bell 47 Inc; names 1 of 9 models: 47H-1

## 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: 6 (6 by airframe model, 0 by engine model)
- Makers: Bell 6

Models with the most aircraft:

- [Bell 47H-1](https://openairdocs.org/model/bell-47h-1): 6 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/56-15-03/models.md
Every aircraft: https://openairdocs.org/ad/56-15-03/aircraft.md

Its text cites no advisory circulars or STCs.

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