As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED LEFT OIL PRESSURE WOULD OCCASIONALLY DROP OFF OUT OF GREEN, WITH NO ASSOCIATED OIL LOW PRESSURE LIGHT. SOMETIMES DURING START AND SOMETIMES IN CRUISE. NUMEROUS ENGINE COMPONENTS WERE REPLACED WITH NO SUCCESS. FINALLY, LEFT OIL PRESSURE SYSTEM WIRING REPLACED FROM ENGINE FIREWALL TO COCKPIT INDICATOR.