As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - LEFT ENGINE INLET DE-ICE BOOTS FAILED TO OPERATE AFTER 5 SECONDS OF OPERATION. AIRCRAFT RETURNED TO STATION DUE TO EXISTING EN ROUTE WEATHER CONDITIONS. MAINTENANCE CLEANED AND LUBED EJECTOR VALVE. INLET BOOT OPERATIONAL CHECK NORMAL ON GROUND. AIRCRAFT RETURNED TO SERVICE. (M)