As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STRONG BURNING SMELL COMING FROM NR 1 AIR CONDITIONING PACK AFTER TAKEOFF AT HIGH POWER SETTINGS, PACK INLET & DISCHARGE TEMPERATURE NORMAL NR 1 AIR CONDITIONING PACK OPERATION NORMAL ON GROUND. REMOVED AND REPLACED WATER SEPARATOR CONICAL COALESCER IAW MM 21-54-03. ALSO REMOVED AND REPLACED NR 1 ANTI-ICE VALVE IAW MM 21-54-04, OPERATION CHECKED NORMAL.