As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ENGINE #1 OIL PRESSURE LOW 5 MINUTES AFTER TAKE OFF. OIL PRESSURE INTERMITTENTLY WENT TO 30 PSI AND THEN BACK IN GREEN. ENGINE #1 EPR ERRATIC AS WELL. 8 MINUTES INTO FLIGHT OIL STABILIZED AT 250 PSI. MAINTENANCE REPLACED ENGINE #1 OIL PRESSURE PUMP (AALA202111174778) AND ENGINE INTERFACE UNIT (AALA202111173395) PER AMM 79-21-24 AND AMM 73-25-34. ACCOMPLISHED IDLE RUN PER AMM 71-00-00.