As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON START #2 ENGINE GRD CREW OBSERVED A LIQUID DRIPPING FROM THE LOWER PORTION #2 ENGINE. GROUNDED - YES. #2 ENG HPTACC VALVE LEAKING FROM DRAIN. R&R HPTACC VALVE IAW B737-900 AMM 75-21-01, PERFORMED ACTUATOR TEST AMM 71-00-00-700-007-F00 AND IDLE POWER LEAK CHECK AMM 71-00-00-700-801-F00. NO LEAK DETECTED OPS CHECKED GOOD. AC OK FOR SERVICE.