What was found
(CAN) BOTH TEDESCO B7936S CHIP DETECTOR BASES FOUND CRACKED AT BASE OF O-RING FLANGE. CAUSED BY OVERTORQUE DURING AN EARLIER INSTALLATION. CRACKS NOT VISIBLE UNTIL CHIP DETECTORS WERE REMOVED TO DRAIN TRANSMISSION OIL.
- Difficulty date
- September 19, 2008
- Submitted
- December 18, 2008
- Operation
- General aviation
- Make and model
- Doug 600N
- Engine
- Allsn 250C47M
- System (JASC)
- 6320 · Main Rotor Gearbox
- Part
- Chip Detector
- Part number
- B7936S
- Condition
- Cracked
- Location
- Transmission
- Part time
- 800 hours
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.