As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) MIDWAY THROUGH THE FLT, THE LT ENG OIL QTY BEGAN TO DECREASE AT THE RATE OF APPROX 1 LITRE EVERY 10 -15 MINUTES. LT ENG THRUST REDUCED OIL QTY STILL DECREASED TO ZERO OIL PRESS AND TEMP REMAINED NORMAL ACTION: REPLACED SERVO FUEL HEATER IAW MM 73-11-09.