70-08-02: Tail Rotor Drive Shaft
FAA order 70-08-02 is an airworthiness directive in force since January 1, 1971. The FAA's subject line: Tail Rotor Drive Shaft. It names Bell-Carson 47, Bell 47: about 483 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: rotorcraft systems.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Scotts-Bell 47 Inc
- Models
- 47, 47B, 47B3, 47D, 47D1, 47E, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, 47H-1, 47J, 47J-2, 47J-2A, 47K
- On this site
- Bell-Carson 47 5 registered
Bell 47 478 registered
Dates and paperwork
- In force since
- January 1, 1971
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (1,058 characters)
70-08-02 BELL: Amendment 39-968 as amended by Amendment 39-1137 Applies to all Bell Model 47 Series Helicopters and all other helicopters incorporating any of the following tail rotor drive shaft assemblies:
47-644-172-3
47-644-180-1
47-644-186-1
47-644-180-5
47-644-187-5
47-644-214-1
47-644-187-11
Compliance required no later than March 1, 1971; however, replacement is recommended at the next 1200-hour overhaul.
To prevent failure from internal corrosion, remove and replace all tail rotor drive shaft assemblies installed on applicable helicopters as indicated below in accordance with the applicable maintenance and overhaul manual:
Remove
Replace With
47-644-172-3
47-644-172-9
47-644-180-1
47-644-180-9
47-644-180-5
47-644-180-11
47-644-214-1
47-644-214-9
47-644-186-1
47-644-186-5
47-644-187-5
47-644-187-17
47-644-187-11
47-644-187-19
(Bell Service Bulletin No. 47-145, Rev. B, dated March 26, 1970, pertains to this matter) Amendment 39-968 effective May 9, 1970.
This amendment, 39-1137, becomes effective January 1, 1971.
Related safety bulletins advice on the same designs, not orders
2001-02-09SW-01-13 ·
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 27, 2026. Connections as data: /graph/directive/70-08-02.json · aircraft systems.