| AD Number | 51-26-01 | Status | Active |
| Effective Date | Not specified | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| 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) | 47B 47B3 47D 47D1 |
51-26-01 BELL: Applies to All Models 47B, 47B3, 47D, 47D1 Helicopters.
A. Compliance required by October 15, 1951, unless Bell Service Instruction 67S1 has been accomplished already.
To provide additional strength to preclude the possibility of tail rotor failures, wrap each tail rotor blade across the junction of the stainless steel leading edge at the root end area of each blade with two strips of unidirectional fiberglass cloth, Bell P/N 47-642-020-14.
(Bell Service Bulletin No. 75 covers this same subject.)
B. Compliance required daily.
Inspect the tail rotor stainless steel leading edge for evidence of loosening or lifting. Carefully inspect the 3/32 radius, the flanges of leading edge at forward edge of reinforcement plates, and the entire root area for cracks. Replace blades immediately if any of these conditions exist.
(Bell Service Bulletin No. 75, revised October 11, 1951, covers this same subject.)
This supersedes AD 51-23-01.