As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING THE BOARDING PROCESS, A LEAK OCCURRED IN THE NR 2 ENGINE AREA RESULTING IN A PUDDLE 10X10 FEET. ERS RESPONDED FOR THE CLEAN UP. PASSENGERS WERE DEPLANED AS A PRECAUTION. RESOLUTION FOUND HEATER RETURN HOSE LEAKING NR HMU CONECTION , RESEATED CONNECTOR IAW AMM 73-21-01-400-002-A , ENGINE RUN C/OUT CHECK SERVE.