As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT WAS BROUGHT IN FOR LOW OIL PRESSURE, STILL WITHIN LIMITS. MAINTENANCE FOUND THE OIL PRESSURE GAGE WAS READING 10 PSI LOWER THAN THE SHOP MASTER GAGE. THE OIL PRESSURE KIT WAS REPLACED WITH A NEW ONE AND WAS TESTED TO BE FOUND ACCURATE. ENGINE RUNS WERE CARRIED OUT WITH NO FAULTS FOUND.