- Effective
- October 12, 1978
- Models
- 204B, 205A, 205A-1, 212
- Registered aircraft
- 125 matched by model
- Product
- Aircraft · Rotorcraft
- Amendment
- 39-3317
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 | 19 KB | 8f804ecc…6563f97 | FAA DRS (API key needed) |
On this page
The airworthiness directive
78-21-02 BELL: Amendment 39-3317. Applies to all Bell Helicopter Models 204B, 205A, 205A-1, and 212 modified by Chadwick, Inc., STC's SH149WE or SH17NW.
Prior to further flight involving external-load operations over congested or densely populated areas, replace Chadwick, Inc., load cell link assembly P/N 47-40200-19 with parts approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Northwest Region.
This amendment is effective October 12, 1978, and was effective earlier for all recipients of the airmail letter dated September 18, 1978, which contained this amendment.
Affected TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 125
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1965 | 1 |
|---|---|
| 1966 | 1 |
| 1967 | 1 |
| 1968 | 5 |
| 1969 | 3 |
| 1970 | 2 |
| 1971 | 3 |
| 1972 | 5 |
| 1973 | 7 |
| 1974 | 11 |
| 1975 | 9 |
| 1976 | 5 |
| 1977 | 5 |
| 1978 | 3 |
| 1979 | 14 |
| 1980 | 12 |
| 1981 | 4 |
| 1982 | 4 |
| 1984 | 1 |
| 1991 | 1 |
| 1993 | 2 |
| 1995 | 1 |
25 with no year recorded