- Models
- 75 (Army PT-13), A75 (Army PT-13A, -13B, -13C), A75J1 (Army PT-18), A75L3, A75L300, A75N1 (Army PT-17, -17A, Navy N2S-1, -4) and 6 more
- Data sheet
- TCDSA-743
- Registered aircraft
- 1,654 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 | 871e2078…aef8f37 | FAA DRS (API key needed) |
On this page
The airworthiness directive
50-06-02 BOEING: Applies to All Model 75 Series Aircraft.
Compliance required at each annual inspection. For military aircraft, compliance also required prior to original certification.
Remove the center section gas tank and inspect both front and rear spars for cracks, checks and warping. Defective spars should be replaced or repaired in accordance with CAM 18. Ascertain that all drain holes are open.
Repeated removal of the tank at each annual inspection is not necessary, if after accomplishment of the items mentioned above, the gap between the gas tank and the upper surface of the center section is sealed by doping on grade A fabric tape, or equivalent sealing means, to prevent moisture entering the tank compartment.
This supersedes AD 45-51-01.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1,654
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1936 | 2 |
|---|---|
| 1937 | 11 |
| 1938 | 5 |
| 1939 | 2 |
| 1940 | 74 |
| 1941 | 290 |
| 1942 | 351 |
| 1943 | 344 |
| 1944 | 39 |
| 1945 | 27 |
| 1946 | 8 |
| 1947 | 4 |
| 1948 | 2 |
| 1949 | 10 |
| 1950 | 5 |
| 1951 | 1 |
| 1952 | 1 |
| 1954 | 1 |
| 1955 | 2 |
| 1957 | 3 |
| 1958 | 3 |
| 1959 | 1 |
| 1960 | 1 |
| 1967 | 1 |
| 1970 | 1 |
| 1971 | 1 |
| 1972 | 2 |
| 1976 | 1 |
| 1984 | 1 |
| 1996 | 1 |
459 with no year recorded
By model
See all 27 modelsAircraft
NTSB investigations that cite this AD · 1
Their narratives or probable cause name AD 50-06-02, often to say whether the aircraft complied with it.