As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED. ENGINE POWER RUN REQUIRED. GROUNDED - YES. FOUND DRIVE PAD COVER LEAKING. REMOVED AND REPLACED DRIVE PAD O-RING REF B737-800 AMM 72-63-01. FOUND EXCESSIVE OIL IN EXHAUST PLUG. A/C HISTORY SHOWS POSSIBLE BAD FROM STOCK LUBE UNIT. REMOVED AND REPLACED LUBE UNIT WITH REF AMM 79-21-01 UP TO OPS AND LEAK CHECK. OPS AND LEAK CHECK AT #1 ENGINE LUBE UNIT REF AMM 79-21-01 IS GOOD.