As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENGINE DRAIN IS LEAKING OIL. GROUNDED - YES. REMOVED AND REPLACED #1 ENG DRIVEN PUMP REF B737-800 AMM 29-11-11-400-801. DURING LEAK TEST CASE OF PUMP FOUND LEAKING. REMOVED BAD FROM STOCK PUMP. INSTALLED NEW. REF AMM 29-11-11. OPS CHECK GOOD. NO LEAKS NOTED. OK FOR SERVICE. GROUND VERIFICATION SUCCESSFUL.