- Models
- 47B, 47B3, 47D, 47D1, 47G
- Data sheet
- TCDSH-1
- Registered aircraft
- 114 matched by model
- Product
- Aircraft · Rotorcraft
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
|---|---|---|---|
| FAA DRS HTML | 20 KB | 38f0ee94…e97c10c | FAA DRS (API key needed) |
On this page
The airworthiness directive
55-05-01 BELL: Applies to All Models 47B, 47B3, 47D, 47D1, 47G Helicopters.
Compliance required at the expiration of 50 flying hours total time. Twenty-five additional flying hours may be acceptable provided the inspection called for in Bell's Mandatory Service Bulletin No. 97, Revision A, is complied with.
In order to prevent seizing, binding or brinelling of pitch control link bearings in the tail rotor pitch control links, P/N 47-641-032-1, it is necessary that these links be replaced with a newly designed tail rotor control link, P/N 47-641-070-1. This new control link incorporates a spherical type bearing in place of the self-aligning ball type bearing.
(Bell Mandatory Service Bulletin No. 97, Revision "A" dated December 3, 1954, covers this same subject and outlines the details for the installation.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 114
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1946 | 1 |
|---|---|
| 1947 | 10 |
| 1948 | 3 |
| 1949 | 3 |
| 1950 | 2 |
| 1951 | 6 |
| 1952 | 8 |
| 1953 | 7 |
| 1954 | 8 |
| 1955 | 4 |
| 1956 | 7 |
| 1957 | 3 |
| 1958 | 1 |
| 1959 | 3 |
| 1960 | 2 |
| 1963 | 6 |
| 1964 | 1 |
| 1965 | 3 |
| 1966 | 1 |
| 1967 | 2 |
| 1969 | 1 |
| 1972 | 1 |
| 1979 | 1 |
30 with no year recorded