As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 3 ENG OIL PRESS FLUCTUATES FROM 35 TO 45 PSI. ENG OIL PRESS LIGHT BLINKS ON & OFF. ALSO OIL QTY WENT FROM 3/4 TO 1/4 AND BACK TO 1/2. FOUND UPPER ENGINE OIL LINE AT OIL FILTER HOUSING CHAFED. REPLACED CHAFED LINE, COI ISSUED/ AMM 20-11-18.