What was found
DURING ROUTINE ANNUAL/100HOUR INSPECTIONS 9 CYLINDERS HAVE BEEN FOUND TO BE CRACKED IN THE SAME LOCATION BETWEEN 4 DIFFERENT AIRCRAFT. ON THE LYCOMING O-320 SERIES OF ENGINES. THEY HAVE BEEN FOUND BETWEEN 591 AND 2261 HOURS.
- Difficulty date
- November 24, 2025
- Submitted
- November 24, 2025
- Operation
- General aviation
- Engine
- Lyc O320*
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Cylinder
- Part number
- LW12416
- Condition
- Cracked
- Location
- Engine
- 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.