What was found
AIRCRAFT RETURNED TO FIELD DUE TO OIL PRESSURE RISING TO 70 PSI ON CLIMBOUT. REMOVED TWO SHIMS AT OIL PRESSURE REGULATOR.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT RETURNED TO FIELD DUE TO OIL PRESSURE RISING TO 70 PSI ON CLIMBOUT. REMOVED TWO SHIMS AT OIL PRESSURE REGULATOR.