- Models
- 35, 35-33, 35-A33, 35-B33, 35-C33, 35-C33A, 35R
- Registered aircraft
- 1,077 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 | cf10153c…7d03c69 | FAA DRS (API key needed) |
On this page
The airworthiness directive
55-22-01 BEECH: Applies to All Model 35 Airplanes, Serial Numbers D-1 Through D- 550, Equipped With Unmodified Oil Tank Check Valves.
Compliance required as soon as possible but not later than January 1, 1956.
To prevent complete loss of the engine oil supply resulting from failure of oil supply line hose connects caused by engine counter rotation, the check valve located at oil tank outlet requires valve modification or removal of the valve internal parts. Modified valves supplied by Beech Aircraft (Beech P/N 35-939082) include 1/16-inch holes drilled in the face of the valve poppet to prevent pressure buildup in the oil supply line in case of engine counter rotation. Modified valves are not available from Beech Aircraft. Unmodified valves should have the internal parts (poppet pivot pin, spring and poppet) removed.
(Beech Service Bulletin Model 35, No. 30, issued July 15, 1955; Service Letter Model 35, No. 44, issued March 28, 1950, and Service Letter Model 35, No. 18, issued July 18, 1947, cover this same subject.)
Affected TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1,077
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.
| 1947 | 174 |
|---|---|
| 1948 | 37 |
| 1953 | 1 |
| 1955 | 1 |
| 1959 | 14 |
| 1960 | 113 |
| 1961 | 81 |
| 1962 | 90 |
| 1963 | 77 |
| 1964 | 63 |
| 1965 | 104 |
| 1966 | 111 |
| 1967 | 47 |
164 with no year recorded