As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT THE RECEIVED A L/H BLEED AIR OVER HEAT ANNUNCIATOR. FOLLOWED THE CHECKLIST AND THE TEMP ANNUNCIATOR EXTINGUISHED AFTER SELECTING R/H SOURCE AND REDUCING L/H ENGINE POWER. LANDED AT DESTINATION WITHOUT EVENT. MX DISCOVERED THE L/H PRECOOLER FAILED. R&R PRECOOLER, OPS CHECK OK.