What was found
WE HAD DIFFICULTY KEEPING THE MID-CABIN COOL. FLIGHT DECK COLD. AFT CABIN VERY COLD. THE MIOD CABIN QUITE WARM. ALL TEMP CONTROLLERS IN AN UNUSUALLY COLD POSITION. GROUNDED - YES. PERFORMED BITE OF PACK ZONE TEMP CONTROLLER #1 + #2, NO FAULTS FOUND, REF AMM 21-61-00-700-806-002. REF FIM 21-61 TASK 858 FOUND AMBIENT TEMPS ACCURATE FWD, MID, AFT CABIN AND AIR COOLING OPS NORMAL. DURING INITIAL EVALUATION, FOUND TEMP INDICATIONS CORRECT ON CABIN TEMP OVERHEAD PANEL, ALL OPS NORMAL. OK FOR CONTINUED SERVICE.