- Models
- Navion (Army L-17A), Navion A (Army L-17B and L-17C), Navion B
- Data sheet
- TCDSA-782
- Registered aircraft
- 746 matched by model
- Product
- Aircraft · Small airplane
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 | 21 KB | 6a41db07…99e0ee0 | FAA DRS (API key needed) |
On this page
The airworthiness directive
51-07-01 NAVION: Applies to All Models Having Serial Numbers 1789 Through 2019; 2021 Through 2026; 2028 Through 2142; 2144 Through 2169; 2171 Through 2177; and 2180.
To be accomplished as indicated below.
It has been found that on some of these airplanes throttle housing slippage has occurred at the point where the cable housing is swaged to the ferrule at the instrument panel end. This slippage can result in erratic throttle operation. An inspection of these controls for evidence of housing slippage must be made not later than March 5, 1951. Any control showing evidence of slippage shall be replaced immediately.
It has been found that housing slippage may be caused by the inner shaft in the control head striking the end of the housing when the throttle is moved to the full open position. To prevent such occurrence, a special stop nut must be installed on the throttle shaft in place of the existing jam nut. This special nut, which will prevent the inner shaft from striking the end of the housing, is being furnished by the Ryan Co. and must be installed by July 15, 1951.
(Ryan Field Service Bulletin No. 9, dated September 1, 1950, covers this same subject.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 746
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1946 | 104 |
|---|---|
| 1947 | 135 |
| 1948 | 143 |
| 1949 | 78 |
| 1950 | 67 |
| 1951 | 32 |
| 1952 | 1 |
| 1953 | 1 |
| 1956 | 1 |
| 1958 | 2 |
| 1959 | 1 |
| 1963 | 1 |
180 with no year recorded