As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING #2 ENG RUN FOUND MAIN OIL/FUEL HEAT EXCHANGER DRAIN PAD LEAKING AT 7 DROPS PER MINUTE. GROUNDED - YES. REMOVED MAIN OIL/ FUEL HEAT EXCHANGER IAW B737-900 AMM 79-21-02/401 AND SERVO FUEL HEATER PER AMM 73-11-07/401. LEAK CHECK GOOD.