As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"TRANSFERRED FROM AML PAGE 4343084 ITEM 1" AFTER APU START AND OPERATING PACK 2 FOR APPROX 3 MINUTES, SMELLED ELETRICAL HEAT/BURNING SMELL WHILE AT THE GATE. F/A REPORTED SMELL BY SEAT 3A FORWARD AND SMELL IN COCKPIT ALSO. NEGATIVE DE-ICE ON ORIGINATION FLIGHT FROM GGG.-C/A-REMOVED AND REPLACED FWD AND AFT HEATED NIPPLES IAW EMB 140 AMM 38-10-04 OPS CK GOOD