As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED OVERHAULED OIL PUMP S/N 59S0 ON NR 1 ENGINE. DURING RUNS, FOUND OIL PUMP NOT DELIVERING PROPER AMOUNT OF PRESSURE. REMOVED OIL PUMP (SECOND ONE) TO INSTALL ANOTHER OIL PUMP. INSTALLED NEW OIL PUMP FROM TURBOMECA TO FIX PROBLEM.