What was found
RECEIVED EICAS MESSAGE OF TIRE PRESS. PRESSURE ON NR 7 INDICATED 180 PSI AND DURING FLIGHT CONTINUED DOWN TO 113 PSI. EMERGENCY WAS DECLARED AND TIRE REMAINED IN TACT DURING LANDING & SUBSEQUENT TAXI IN INITIAL INDICATION AT APPROXIMATELY 2 HOURS 30 MINUTES INTO FLIGHT TIRE PRESS STATUS MSG REMAINS. REASON CODE : PREMATURE REMOVAL/INSTALLATION OFF MPN: 294W5110-568 POS: 7 SRL: 10836 ON MPN: 294W5110-568 CPN: 3216591 SRL: 23184. REMOVED AND REPLACED NR 7 MAIN TIRE ASSY REF MM 32-45-01-4. OK FOR SERVICE.