What was found
AFTER PUSHBACK ON RECALL LT PACK LIGHT, MC AND AIR COND LIGHT ILLUMINATED. RESET AND ALL LIGHT EXTINGUISHED. ACFT GROUNDED. PERFORMED BITE CHECK, FOUND TEMP CONTROL VALVE ISSUE FAULT CODE 21-51266 AND 21-51267. REMOVED LT TEMP CONTROL VALVE, REF AMM 21-51-10. INSTALLED NEW LT CONTROL VALVE, REF AMM 21-61-00. PERFORMED PACK FLOW TEMP CONTROL BITE TEST, REF AMM 21-61-00. OPS CHECKS GOOD, NO FAULTS NOTED.