As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TEMPERATURE IN COCKPIT UNCONTROLLABLE, BURNING SMELL NOTED INITIALLY WHEN BLEEDS TURNED ON. EXTREMELY HOT AIR BLOWING THRU VENTS. DUCT SHOWED 35 DEGREES THEN COOLED WHEN BLEEDS TURNED OFF. TEMPERATURE COOLED AFTER BLEEDS TURNED OFF, BUT STILL HOT. F/A NOTICED BURNING SMELL WHEN COCKPIT DOOR OPENED. REMOVED AND REPLACED RT ACM IAW 21-50-035 PN ON/OFF 776910-6 SN OFF 921078, SN ON 920548, OPS CHECK GOOD.