As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STARTED HAVING INTERMITTENT OIL PRESSURE FLUCTUATIONS, LOST OIL PRESSURE DURING TAKE OFF. ABORTED TAKE OFF. INSTALLED REPAIRED UNIT. OPS CHECKED GOOD. STARTED HAVING FLUCTUATIONS IN OIL PRESSURE, INSTALLED REPAIRED OIL PUMP. OPS CHECKED GOOD. HAD A LOSS OF OIL PRESSURE ON ENGINE START. INSTALLED A THIRD OIL PUMP.