What was found
(AUS) ENGINE/TRANSMISSION OIL COOLER INTERNAL LEAK. THE LEAK ALLOWED TRANSMISSION OIL TO ENTER THE COMBINING GEARBOX OIL SYSTEM UNDERPRESSURE AND OVERFILL THE COMBINING GEARBOX WHICH THEN VENTED THROUGH THE BREATHER.
- Difficulty date
- March 3, 2004
- Submitted
- June 4, 2004
- Operation
- General aviation
- Make and model
- Bell 412
- Engine
- Pwa PT6T3B
- System (JASC)
- 7921 · Engine Oil Cooler
- Part
- Oil Cooler
- Part number
- 8538100
- Condition
- Leaking
- Location
- Engine
- Stage of operation
- LD
- How discovered
- O
- Nature of condition
- K, B
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.