- 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 | 79ec8c5c…eaede0c | FAA DRS (API key needed) |
On this page
The airworthiness directive
46-06-01 RYAN: (Was Service Note 5 of AD-749-1.) Applies Only to Model ST-3KR Aircraft Serial Numbers 1001 to 2249, Inclusive.
At each periodic inspection examine the front fin spar at its attachment to the fuselage for cracks. If no cracks are found and if spar has been reinforced at the critical section by means of a wood plug pressed into the end of the spar, no further action is mandatory. If cracks are found, the spar should be repaired by cutting the spar member approximately 3 1/4 inches above the lower bend and splicing on, by means of 3/16-inch bolts, a 1 1/8 by 0.058 inch X-4130 spar replacement section.
(Ryan Service Bulletin No. 1044 covers the installation of the wood plug and Ryan drawing SK-1879 covers the splice repair.)
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