As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE AIR INLET FAILED 14 MINUTES INTO FLIGHT PASSING THROUGH FL180. TURNED OFF FOR A FEW MINUTES AND THEN ON FOR ANOTHER 14 MINUTES DURING RETURN TO SLC AND IT DID NOT FAIL AGAIN. REMOVED AND REPLACED LEFT ENGINE DEICE TIMER IAW MM 30-20-05. REMOVED AND REPLACED DEICE MONITOR IAW MM 30-00-01. OPS CHECK GOOD. DE-ICE MONITOR P/N 0552-01-001, S/N OFF 132/10-87.