- Models
- Army AT-11, C18S, D18C, D18C-T, D18S
- Data sheets
- TCDSA-765TCDSA-2-582TCDSA-757TCDSTC 770
- Registered aircraft
- 68 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 January 21, 2026.
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 | 0894a343…105a702 | FAA DRS (API key needed) |
On this page
The airworthiness directive
48-34-01 BEECH: Applies to All Models AT-11, C18S Airplanes Which Have Been Modified in Accordance With Beech Service Bulletin D18-48 Referred to in AD 47-33-5 and All D18C, D18S and D18C-T Airplanes Which Have Been Modified in Accordance With Beech Service Bulletin D18C-3 Referred to in AD 47-33-06.
Inspection required at next periodic inspection.
Inspect the NAS 144 bolts, (identified by the stamped bolt head), installed in the revised stabilizer attachment fittings to determine that the depth of the outer dimension of the bolt head conforms to the acceptable limit of 0.226 inch plus or minus 0.010 inch. Bolts that do not meet this specification are under strength and must be replaced. Inspect the fuselage to stabilizer attachment fitting, P/N 437-186096, to determine that this fitting has not cracked where the lower 1/4-inch rivet attaches the fitting to the fuselage.
(Beech Service Bulletin No. D18-51 covers this same subject.)
Affected TCDS · 4
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 68
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1942 | 1 |
|---|---|
| 1943 | 3 |
| 1944 | 5 |
| 1945 | 4 |
| 1946 | 15 |
| 1947 | 2 |
| 1948 | 2 |
| 1949 | 1 |
| 1950 | 1 |
| 1951 | 2 |
| 1952 | 6 |
| 1953 | 4 |
| 1954 | 2 |
| 1958 | 1 |
| 1966 | 1 |
18 with no year recorded