- 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 | 20 KB | fd590463…454e20f | FAA DRS (API key needed) |
On this page
The airworthiness directive
52-26-01 NAVION: Applies to All Models, Serial Numbers NAV-4-2 and Subsequent.
Compliance required as indicated.
Inspect as soon as practical, but not later than February 1, 1953, and at 100-hour intervals thereafter the area in the vicinity of the stabilizer fuselage attachment for cracks. Particular attention should be given to the stabilizer spar web (gusset) immediately outboard of the root rib and the fuselage attaching fitting. If cracks are found in the fuselage fitting, P/N 143-31004-13, the entire part should be replaced. Cracks in the root rib may be repaired in accordance with CAM No. 18. Cracks in the spar web (gusset) require the replacement of the gusset with a new part made in accordance with Figure 2.
AD 52-26-01
Periodic inspections of stabilizer spar web only may be discontinued after installation of new gussets.
(Ryan Navion Field Service Bulletin No. 17 dated September 28, 1952, 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