What was found
(CAN) BURNING SMELL DETECTED IN COCKPIT DURING RAMP CHECK. APU RAN FOR ONE HOUR. BOTH PACKS ON AND ALL DOORS CLOSED. NO BURNING SMELL DETECTED. SUSPECT CAUSE MAY HAVE BEEN GROUND HEATING UNIT.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) BURNING SMELL DETECTED IN COCKPIT DURING RAMP CHECK. APU RAN FOR ONE HOUR. BOTH PACKS ON AND ALL DOORS CLOSED. NO BURNING SMELL DETECTED. SUSPECT CAUSE MAY HAVE BEEN GROUND HEATING UNIT.