- Model
- ST-3KR
- Data sheet
- TCDSA-749
- Registered aircraft
- 117 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 | 400867a1…564d8fe | FAA DRS (API key needed) |
On this page
The airworthiness directive
51-28-03 RYAN: Applies to All Model ST-3KR (Military PT-22) Aircraft.
To be accomplished by February 1, 1952, or next 100-hour inspection, whichever is first.
The fuel selector valve handles for these aircraft are usually placarded "Always take off with fuel feeding from Reserve". However, there have been fatal accidents which resulted from failure to observe this procedure, or from failure to return to the Reserve position when landing with a low fuel supply. Therefore, the following placard must be installed, or the existing placard revised to read: "Always take off and land with fuel feeding from RESERVE".
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 117
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1941 | 40 |
|---|---|
| 1942 | 45 |
| 1943 | 3 |
| 1945 | 2 |
| 1949 | 1 |
26 with no year recorded