As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE OIL QTY DECREASED TO 2 QUART INFLIGHT. STARTED AT 18 QUARTS. LEVEL DID NOT RECOVER TO NORMAL. 6 QUART DROP/ 1 HOUR. PERFORMED ENG VENTS AND DRAINS INSP. IAW AMM 71-71-00, FOUND FUEL/ OIL HEAT EXCHANGER LEAKING FROM DRAIN OUT OF SERVICABLE LIMITS. R/R OIL/ FUEL HEAT EXCHANGER IAW AMM 79-21-02. PERFORMED IDLE POWER LEAK CHECK FOR OIL/ FUEL HEAT EXCHANGER AND SERVO FUEL HEATER. IAW AMM 71-00-00. NO LEAKS NOTED. OK FOR SERVICE.