As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENG FUEL DRIPPING FROM COWL @ SIX O'CLOCK UNABLE TO IDENTIFY SOURCE/DRAIN. GROUNDED - YES. ACCOMPLISHED ENGINE VENTS AND DRAINS INSPECTION, FOUND FUEL DRIPPING FROM FUEL/OIL HEAT EXCHANGER PAD DRAIN @ 4 DROPS/MIN REF B737-800 AMM TASK 71-71-00-200-801-F00. REMOVED AND REPLACED THE MAIN OIL/FUEL HEAT EXCHANGER PER AMM 79-21-02/400. COMPLETED SERVO FUEL HEATER INSTALLATION TEST REF AMM SUBTASK 73-11-07-720-001-F00 AND TASK 71-00-00-800-811-F00. NO LEAKS NOTED.