As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT PRIMARY HEAT EXCHANGER INLET TEMP IND IS MISSING. (<P>UPON TROUBLESHOOT, REMOVED AND REPLACED LT PRIMARY HEAT EXCHANGER INLET TEMPERATURE BULB IAW AMM 21-52-08-404-010. PERFORMED GOOD OPS CHECK WITH NO DEFECTS NOTED AND INDICATION IS BACK ON EICAS IAW AMM 21-52-08-404-010.</P>)