As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - FLT 56 - AFTER TAKEOFF APPROX 1000 FEET AGL, CREW HEARD LOUD BANG AND NOTED NUMEROUS WARNINGS ON THE LEFT ENGINE, AS WELL AS LIGHT SMOKE IN THE COCKPIT. ENGINE WAS SHUT DOWN. FLIGHT RETURNED TO SFO AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE ACTION PENDING. (M)