What was found
NEW THROUGH-BOLT BROKE AFTER TORQUED TO 67 FEET/POUND. BROKE AT O-RING GROOVE IN CENTER OF BOLT. SUBMITTER SUSPECTS POSSIBLE HYDROGEN EMBRITTLEMENT FROM PLATING.
- Difficulty date
- August 21, 1995
- Submitted
- March 26, 2000
- Operation
- General aviation
- Engine
- Cont IO470N
- System (JASC)
- 8520 · Reciprocating Engine Power Section
- Part
- Through-Bolt
- Part number
- 641931981
- Condition
- Broke
- Location
- Engine
- Stage of operation
- IN
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.