What was found
ON REMOVING THE REAR CASE OF THIS ENGINE, FOUND 7 BROKEN .3125 LOCK NUTS. ALSO FOUND 3 BROKEN NUTS ON THE OIL PUMP WHICH IS ATTACHED TO THE REAR CASE. SOME OF THOSE NUTS WERE BROKEN IN 3 SECTIONS. THE ENGINE WAS O/H.
- Difficulty date
- September 15, 2015
- Submitted
- November 12, 2015
- Operation
- General aviation
- Aircraft
- N13444
- Make and model
- Waco UBF
- Aircraft serial
- 3763
- Engine
- Cont W6706A
- System (JASC)
- 8500 · Engine (Reciprocating)
- Part
- Lock Nut
- Condition
- Broken
- Location
- Rear Case
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.