# AD 52-05-03: Engine Mount Safety Strap

- Type: Airworthiness directive
- Status: Current
- Products: Scotts-Bell 47 47, 47B, 47B3, 47D, 47D1, 47E, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B and 12 more
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Registered aircraft: 490 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AC82B91DCB118B2986256A34004EB886.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/52-05-03

## The airworthiness directive

52-05-03 BELL: Applies to All Model 47 Helicopters Incorporating Engine Mount Assembly, P/N 47-612-11-1 or -5.

Compliance recommended upon receipt of parts, but required not later than the next 25- hour inspection following receipt of parts or April 1, 1952, whichever occurs first.

As a precautionary measure against the serious consequences resulting from the failure of this particular engine mount, Safety Strap Kit, P/N 47-612-132, must be installed. This kit can be obtained free of charge from the Bell Aircraft Corp., and must be installed in accordance with Bell Service Bulletin No. 87.

AD 51-27-01 remains in effect and is used in conjunction with this directive.

(Bell Service Bulletin No. 87 dated February 12, 1952, covers this same subject.)

## Affected data sheets (3) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2H3](https://openairdocs.org/tcds/2H3): Scott's-Bell 47 Inc; names 11 of 11 models: 47G-2A, 47G-3B, 47G-3, 47G-4A, 47G-5A, 47G-5, 47G-3B-2A, 47G-3B-2…
- [TCDS H-1](https://openairdocs.org/tcds/H-1): Scott's-Bell 47 Inc; names 9 of 9 models: 47H-1, 47B, 47B3, 47D1, 47D, 47G-2, 47G, 47…
- [TCDS 2H1](https://openairdocs.org/tcds/2H1): Scott's-Bell 47 Inc; names 4 of 4 models: 47K, 47J-2, 47J-2A, 47J

## 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: 490 (490 by airframe model, 0 by engine model)
- Makers: Bell 476, Bell-K-Copter 3, Bell Kitz Kopters 1, Bell-Allied Helicopter 1, Bell-Carson 1, Bell-Huddleston And Wilson 1, Bell-Intermountain 1, Bell-Olympic Helicopters 1, Bell-Shippey 1, Bell-Tellijohn 1

Models with the most aircraft:

- [Bell 47G-2](https://openairdocs.org/model/bell-47g-2): 87 aircraft (airframe model)
- [Bell 47G-3B-1](https://openairdocs.org/model/bell-47g-3b-1): 86 aircraft (airframe model)
- [Bell 47G](https://openairdocs.org/model/bell-47g): 55 aircraft (airframe model)
- [Bell 47D1](https://openairdocs.org/model/bell-47d1): 47 aircraft (airframe model)
- [Bell 47G-5](https://openairdocs.org/model/bell-47g-5): 40 aircraft (airframe model)
- [Bell 47G-3B-2](https://openairdocs.org/model/bell-47g-3b-2): 26 aircraft (airframe model)
- [Bell 47G-4A](https://openairdocs.org/model/bell-47g-4a): 20 aircraft (airframe model)
- [Bell 47G-2A](https://openairdocs.org/model/bell-47g-2a): 19 aircraft (airframe model)
- [Bell 47G-5A](https://openairdocs.org/model/bell-47g-5a): 19 aircraft (airframe model)
- [Bell 47G-3B](https://openairdocs.org/model/bell-47g-3b): 15 aircraft (airframe model)
- [Bell 47G-2A-1](https://openairdocs.org/model/bell-47g-2a-1): 13 aircraft (airframe model)
- [Bell 47G-4](https://openairdocs.org/model/bell-47g-4): 13 aircraft (airframe model)
- [Bell 47G3B2A](https://openairdocs.org/model/bell-47g3b2a): 7 aircraft (airframe model)
- [Bell 47H-1](https://openairdocs.org/model/bell-47h-1): 6 aircraft (airframe model)
- [Bell 47J](https://openairdocs.org/model/bell-47j): 6 aircraft (airframe model)
- [Bell 47J-2](https://openairdocs.org/model/bell-47j-2): 6 aircraft (airframe model)
- [Bell 47J-2A](https://openairdocs.org/model/bell-47j-2a): 5 aircraft (airframe model)
- [Bell 47D](https://openairdocs.org/model/bell-47d): 4 aircraft (airframe model)
- [Bell-K-Copter 47G](https://openairdocs.org/model/bell-k-copter-47g): 2 aircraft (airframe model)
- [Bell 47B](https://openairdocs.org/model/bell-47b): 1 aircraft (airframe model)

All 35 models: https://openairdocs.org/ad/52-05-03/models.md
Every aircraft: https://openairdocs.org/ad/52-05-03/aircraft.md

Its text cites no advisory circulars or STCs.

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