- Published
- December 4, 1956
- Issued
- December 4, 1956
- Models
- 170, 170A, 170B, PA-20, 108
- Registered aircraft
- 2,595 matched by model
- Product
- Appliance
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 November 21, 2025.
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 | e91efddd…1f958a1 | FAA DRS (API key needed) |
On this page
The airworthiness directive
54-02-02 FEDERAL SKIS: Applies to All Universal (Stinson) 108 and Cessna 170, 170A and 170B Airplanes Equipped With Federal Models AWB-2500 and AWB-2500A Wheel Skis and Piper PA-20 Airplanes Equipped With Federal Model AWB-2100 Wheel Skis.
Compliance required as soon as possible but not later than February 15, 1954.
To preclude the possibility of the ski dropping down against the mechanical rigger and possible subsequent damage to the aircraft structure, the rigging arrangement must be revised in accordance with Federal Aircraft Works Drawing No. 11D1077.
Affected TCDS · 3
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 2,595
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1945 | 2 |
|---|---|
| 1946 | 144 |
| 1947 | 32 |
| 1948 | 198 |
| 1949 | 126 |
| 1950 | 334 |
| 1951 | 166 |
| 1952 | 448 |
| 1953 | 272 |
| 1954 | 190 |
| 1955 | 181 |
| 1956 | 29 |
| 1957 | 5 |
| 1958 | 2 |
| 1959 | 2 |
| 1963 | 1 |
| 1979 | 1 |
| 1987 | 1 |
461 with no year recorded