What was found
ON APPROACH LANDING CHECKLIST RECALL MASTER CAUTION LIGHT STAYED ON LOOKED UP, AFT CAB ZONE TEMP LT ON RESET, LIGHT WENT OUT. ACFT GROUNDED. AFT CABIN ZONE TEMP ANNUNCIATOR DOES NOT ILLUMINATE. WITH MASTER CAUTION RECALL. NR 2 TEMP CONTROLLER DOES SHOW ON PREVIOUS FLT AND VERIFY BITE TEST A FAULT OF CONTROLLER FAULT STANDBY PACK WHEN PERFORMING FIM 21-62 TASKS 801/803. R & R NR 2 PACK/ZONE TEMPERATURE CONTROLLER REF MM 21-61-20. GROUND VERIFICATION TESTED GOOD, REF MM.