1. Drained oil, Added 8 quarts of Aeroshell W100 Plus oil. Replaced oil filter Tempest P/N AA48110-2. Open oil filter, no metal particles found.
2. Accomplished cylinder compression Test: No.1 (78/80), No.2 (76/80), No.3 (74/80), No.4 (78/80).
3. Replaced all spark plugs with new P/N REM40E.
4. Replaced left magneto with new P/N 4371 S/N 17050612.
5. Replaced right magneto with new P/N 4370 S/N 17050600.
6. Replaced (2) magneto gasket with new P/N 08-00285.
7. Reinstalled primer line (1) P/N 1700121-98 after repaired by Aerotar see W/O 1281.
4. Ran engine, checked for leaks and verified its performance.
I certify that this engine has been inspected in accordance with FAR 43 App. 100HR inspection and was determined to be in airworthy condition. 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.