# AD 49-34-02: Ventral Fin Inspection

- Type: Airworthiness directive
- Status: Current
- Products: Scotts-Bell 47 47D1
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Registered aircraft: 49 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/580437FF09DEA44786256A34004E4766.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/49-34-02

## The airworthiness directive

49-34-02 BELL: Applies to All Model 47D1 Helicopters.

Compliance required as soon as possible but not later than September 2, 1949, and daily thereafter.

As a result of several fatigue failures of the attaching clamps on the ventral fin and at the attaching bolt holes of the fixed tab, these parts should be visually inspected daily until a permanent fix is available. If cracks are detected, either in the AN 735 clamps, the ventral fin, or the fixed tab, the effected part should be replaced prior to the next flight.

(Bell Service Bulletin No. 70 covers the 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: 47D1

## 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: 49 (49 by airframe model, 0 by engine model)
- Makers: Bell 47, Bell Kitz Kopters 1, Bell-Allied Helicopter 1

Models with the most aircraft:

- [Bell 47D1](https://openairdocs.org/model/bell-47d1): 47 aircraft (airframe model)
- [Bell Kitz Kopters 47D1](https://openairdocs.org/model/bell-kitz-kopters-47d1): 1 aircraft (airframe model)
- [Bell-Allied Helicopter 47D1](https://openairdocs.org/model/bell-allied-helicopter-47d1): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/49-34-02/models.md
Every aircraft: https://openairdocs.org/ad/49-34-02/aircraft.md

Its text cites no advisory circulars or STCs.

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