As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 133 EXPERIENCED AN IN FLIGHT SHUTDOWN DUE TO A LEFT ENGINE FIRE WARNING ON CLIMBOUT FROM PDX. PILOTS FOLLOWED POM PROCEDURES. MAINTENANCE FOUND A LOOSE HIGH PRESSURE VALVE INBOAD CLAMP AFTER BACK PRESSURIZING USING APU. RESECURED CLAMP AND RELEAK CHECKED VALVE, ALL NORMAL. RAN NR 1 ENGINE AT TAKEOFF POWER AND NO WARNING NOTED.