What was found
RT PACK LIGHT ILLUMINATED ON CLIMB OUT DID NOT TRIGGER MASTER CAUTION WILL NOT RESET PER QRH AFTER LANDING MASTER CAUTION TRIGGERED PACK LIGHT OFF W/ MASTER CAUTION RESET. GROUNDED - YES. PERFORMED R/H & L/H PACK ZONE TEMP BITE REF AMM 21-51-00. FOUND R/H TCV FAULT IN BIT/PREV FLT AND VERIFY. REPLACED R/H PACK TEMP CONT VLV REF AMM 21-51-10 OPS CK & BITE TEST GOOD NO FAULTS FOUND F/O MASTER CAUTION SIX PACK WILL NOT TEST WITH TEST SWITCH. CLEANED SIX PACK BULB HOLDER AND SOCKET. MASTER DIM AND TEST/ SIX PACK OPS CKS GOOD. REF AMM 33-18-00 ETOPS SIG SYS GND VERIFICATION SUCCESSFUL