- Effective
- February 27, 1980
- Models
- G-1159, G-1159A, G-1159B, Safety Belt Assemblies, DH.125 Series 1A, DH.125 Series 1A-522 and 14 more
- Registered aircraft
- 130 matched by model
- Product
- Appliance
- Amendment
- 39-3700
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 January 21, 2026.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
| File | Size | SHA-256 | Original |
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| FAA DRS HTML | 20 KB | e28ca988…da05426 | FAA DRS (API key needed) |
On this page
The airworthiness directive
80-05-02 HAMILL MANUFACTURING COMPANY: Amendment 39-3700. Applies to Model GA-4 and GA-5 safety belt assemblies marked as meeting the standards of FAA TSO-C22F. These safety belts are installed in, but not limited to, the following aircraft operated by General Motors Corporation and Firestone Tire and Rubber Company: Grumman American 1159, Rockwell International NA265, Convair 580 and Hawker Siddeley DH125.
These safety belts can no longer be considered to meet the standards prescribed by FAA TSO-C22f and the approved special criteria for push-button release mechanisms which requires the push-button force to be between 2.5 and 8 pounds when using the loading conditions specified in FAA TSO-C22f (Section 4.3.2.2 of NAS 802).
Within 120 days from the effective date of this AD, these safety belts shall not be used in type certificated aircraft.
This amendment becomes effective February 27, 1980.
Affected TCDS · 3
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 130
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 | 6 |
| 1969 | 2 |
| 1970 | 1 |
| 1971 | 1 |
| 1972 | 1 |
| 1973 | 4 |
| 1974 | 4 |
| 1975 | 2 |
| 1976 | 3 |
| 1977 | 1 |
| 1978 | 1 |
| 1979 | 6 |
| 1980 | 13 |
| 1981 | 18 |
| 1982 | 9 |
| 1983 | 3 |
| 1984 | 14 |
| 1985 | 2 |
| 1986 | 3 |
| 1994 | 1 |
32 with no year recorded