LGT ENG RUNNING DURING REFUELING; AND ALSO PAX STILL ABOARD THE ACFT.

Narrative

OPERATED FLT TO PIE. UPON PARKING ACFT (B-727); ESTABLISHED APU ELECTRIC PWR AND SHUT DOWN #2 ENG (#3 SHUT DOWN ON INBOUND TAXI). JUST PRIOR TO SHUTTING DOWN #1 THE APU GENERATOR FAILED AND ACFT WENT DARK. THE FE WAS UNABLE TO REESTABLISH APU ELECTRICS. SO I HAD HIM PLACE THE #1 ENG GENERATOR BACK ON LINE AND CALL OPS FOR A GND ELECTRIC CART. AT THAT TIME I HEARD THE FRONT DOOR BEING OPENED AND YELLED FOR THE FLT ATTENDANT TO CLOSE IT BECAUSE THE ENG WAS RUNNING. THE GND ELECTRIC CART ARRIVED IN 8-9 MINS AND THE ENG WAS SHUT DOWN AND PAX DEPLANED. UPON LEAVING THE ACFT; AN FAA SAFETY INSPECTOR WAITING TO RIDE OUR OUTBOUND FLT INFORMED ME THAT THE FUELER HAD BEEN FUELING THE ACFT DURING THE TIME OUR #1 ENG WAS RUNNING. WHEN THE INSPECTOR TOLD THE FUELER THAT AN ENG WAS STILL RUNNING; THE FUELER STATED THAT THE NOISE WAS FROM THE APU AND THAT NO ENGS WERE RUNNING. WILL RECOMMEND COMPANY TRAINING FOR FUELERS NOT TO HOOK UP TO ACFT UNTIL THE ANTI-COLLISION LIGHT HAS BEEN TURNED OFF; AND TO REEMPHASIZE TO LEAD FLT ATTENDANTS NOT TO OPEN A DOOR UNTIL THE 'SEAT BELT' SIGN HAS BEEN TURNED OFF (PER CURRENT PROCS)!