As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGERS & FLIGHT ATTENDANT SAW SPARKS COMING FROM THE FAN BLADES ON ENG 03 & 04(<P>INSPECTED FAN BLADES ABRADE SHROUD ENG INLET AND EXH BLADES ON ENG 3 AND 4 IAW 747 FIM 71-00 FT 104 SHT 1, NO DEFECTS FOUND AND FLIGHT CREW REPORTED NO ANOMOLIES. A/C OK FOR SVC. </P>)