What was found
ON AFTER START ZONE TEMP LIGHT ON RECALL, LIGHT OUT WITH MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED BITE OF THE PACK/ZONE TEMP CONTROLLERS, REF FIM 21-62, TASK 801. FOUND NUISANCE FAULT ON THE NR 2 PACK/ZONE TEMP CONTROLLER FOR THE FLIGHT DECK TRIM VALVE FAULT CLEARED, RAN APU & PACKS, TEMP CONTROL OPS NORMAL. OK FOR CONTINUED SERVICE, CLEARS MEL 21-21F.