- Effective
- October 3, 1968
- Models
- Navion A (Army L-17B and L-17C), Navion B, Navion D, Navion E, Navion F, Navion G, Navion H, Navion (Army L-17A)
- Data sheet
- TCDSA-782
- Registered aircraft
- 864 matched by model
- Product
- Aircraft · Small airplane
- Amendment
- 39-663
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 | 6d5a9776…fcf4c9c | FAA DRS (API key needed) |
On this page
The airworthiness directive
68-20-06 NAVION: Amendment 39-663. Applies to Navion through Navion H airplanes.
Compliance required within the next 50 hours time in service after the effective date of this AD, and each annual inspection thereafter.
To prevent failure of the Rudder Horn, P/N 145-24401, accomplish the following:
Inspect for horizontal cracks or corrosion in the edge of the rudder horn. These cracks would appear as delaminations or swelling under the paint. Replace corroded or cracked rudder horns with new or unused part of the same part number or Federal Aviation Administration approved equivalent part before further flight.
This amendment becomes effective October 3, 1968.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 864
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1946 | 107 |
|---|---|
| 1947 | 137 |
| 1948 | 145 |
| 1949 | 79 |
| 1950 | 70 |
| 1951 | 33 |
| 1952 | 1 |
| 1953 | 1 |
| 1956 | 1 |
| 1958 | 2 |
| 1959 | 2 |
| 1961 | 6 |
| 1962 | 46 |
| 1963 | 1 |
| 1964 | 3 |
| 1965 | 1 |
| 1967 | 3 |
| 1968 | 10 |
| 1969 | 4 |
| 1970 | 6 |
| 1972 | 1 |
| 1973 | 1 |
| 1974 | 1 |
| 1975 | 2 |
| 1976 | 3 |
198 with no year recorded