# AD 57-12-02: Tail Boom Attach Fittings

- 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- Superseded by: Nothing supersedes this AD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/705C3C685160676886256A340050AC71.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/57-12-02

## The airworthiness directive

57-12-02 BELL: Applies to Model 47H1 Helicopters Serial Numbers 1349, 1351 Through 1360, 1362, 1363, 1365 Through 1371.

Compliance required as soon as possible but not later than August 1, 1957.

In order to prevent possible failure of the tail boom attach bolts the following inspection and rework should be accomplished.

1. Visually inspect the four (4) tail boom attach fittings 47-265-026-1 and -2 on the forward bulkhead to determine if all eight (8) bolt hole locations (2 in each fitting) have been spot faced. It is necessary to remove the baggage compartment floor section in order to make this inspection.

2. If it is found that any or all the bolt hole locations have not been spot faced, it is required that they be spot faced in accordance with the instructions given in Bell Mandatory Service Bulletin No. 116, dated November 9, 1956.

## 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/57-12-02/models.md
Every aircraft: https://openairdocs.org/ad/57-12-02/aircraft.md

Its text cites no advisory circulars or STCs.

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