| AD Number | 70-08-02 | Status | Active |
| Effective Date | January 01, 1971 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-1137 |
| Product Type | ["Aircraft"] | Product Subtype | ["Rotorcraft"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Scotts-Bell 47 Inc |
| Model(s) | 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 |
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.