- Models
- Double Row Cyclone 739C18BA3, Double Row Cyclone 745C18BA3, Double Row Cyclone 745C18BA4, Double Row Cyclone 749C18BD1, Double Row Cyclone 749C18BD3
- Data sheet
- TCDSE-218
- Product
- Engine
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 | 18 KB | 7c94aa03…fb3718b | FAA DRS (API key needed) |
On this page
The airworthiness directive
52-20-02 WRIGHT: Applies to All Models C18BA and C18BD Engines.
Compliance required as soon as possible but not later than October 31, 1952.
To prevent crankpin sludge from washing into the master rod bearing oil supply passages causing failure of the bearing, the use of oil dilution must be discontinued and the dilution lines disconnected or removed. This restriction on oil dilution is to continue until an adequate sludge controlling device is developed and incorporated in these engines.
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.