- Model
- Navion (Army L-17A)
- Data sheet
- TCDSA-782
- Registered aircraft
- 373 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 | 19 KB | fa5a4087…87d923c | FAA DRS (API key needed) |
On this page
The airworthiness directive
47-31-03 NAVION: (Was mandatory Note 12 of AD-782-3.) Applies to Serial Numbers NAV-4-2 Through NAV-4-1010 Which Incorporate Koehler Model 2250 Fuel Strainers.
To be accomplished not later than November 1, 1947.
To preclude the possibility of loss of fuel pressure due to air leakage into the fuel system through the CCA-1550-1/8 drain cock on the Koehler Model 2250 fuel strainer, remove this draincock and install Whittaker Model 7600-1/8 drain cock.
(NAA Field Service Bulletin No. 32 dated May 1, 1947, covers this rework.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 373
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1946 | 78 |
|---|---|
| 1947 | 98 |
| 1948 | 88 |
| 1949 | 23 |
| 1950 | 2 |
| 1951 | 1 |
| 1956 | 1 |
| 1958 | 1 |
| 1959 | 1 |
80 with no year recorded