1. Drained oil. Added 6 quarts of Phillips 66 Victory 100AW-50 oil. Replaced oil filter Tempest P/N AA48110-2. Opened oil filter, no metal particles found.
2. Accomplished cylinder compression Test: No.1 (74/80), No.2 (72/80), No.3 (76/80), No.4 (76/80).
3. Cleaned and re-gapped all Spark Plugs.
4. Ran engine and checked for leaks and its performance.
All maintenance performed on this Engine was conducted in accordance with Lycoming Operator's Manual Model O-320 Series, and the current regulations of the Federal Aviation Administration and is approved for return to service with respect to the work performed.