- Effective
- March 10, 1977
- Model
- 212
- Data sheet
- TCDSH4SW
- Registered aircraft
- 59 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-2846
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 | 8b176eab…9683181 | FAA DRS (API key needed) |
On this page
The airworthiness directive
77-05-02 BELL: Amendment 39-2846. Applies to Bell Model 212 helicopters certificated in all categories.
Compliance required as indicated.
To prevent possible failure of certain main rotor blades having possible corrosion or fretting in the blade weight bolt holes or other defects in the spar, accomplish the following for main rotor blades, P/N 204-012-001-23 and -29.
For blades with less than 1475 hours' total time in service on the effective date of this AD, remove these blades from further service prior to attaining 1500 hours' total blade time in service.
For blades with 1475 or more hours' total blade time in service on the effective date of this AD, remove these blades from further service within 25 hours' time in service.
This AD does not apply to blades, P/N 204-012-001-33.
(Bell Helicopter Textron message dated February 17, 1977, to all Model 212 operators pertains to this subject.)
This amendment becomes effective March 10, 1977.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 59
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1971 | 1 |
|---|---|
| 1972 | 2 |
| 1973 | 3 |
| 1974 | 4 |
| 1975 | 4 |
| 1976 | 2 |
| 1977 | 4 |
| 1978 | 2 |
| 1979 | 8 |
| 1980 | 8 |
| 1981 | 3 |
| 1982 | 4 |
| 1984 | 1 |
| 1991 | 1 |
| 1993 | 2 |
| 1995 | 1 |
9 with no year recorded