What was found
RECALL AIR CONDITIONER AFT ZONE TEMP MASTER CAUTION, RESET ON MASTER CAUTION. ACFT GROUNDED. BITE CHECK OF NR 2 PACK/ZONE TEMP CONTROLLER M1443, FAULTED "CABIN SENSOR" " BACKUP ZONE". ACCOMPLISHED FIM 21-62/816. CABIN TEMP SENSOR CHECKS OK, WIRING BETWEEN D3910 AND D3860A OK. ALSO, CHECKED CONNECTOR D41818P&J, OK SN OF NR 2 PACK/ZONE TEMP CONTROLLER, 622814-04530, WAS PREVIOUSLY INSTALLED AND FAILED WITH SAME FAULT. REPLACED M1443. REF AMM 21-61-20/401. PACK/ZONE TEMP BITE CHECK PASSES.