As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER SAW SPARKS OUT OF THE NR 1 ENGINE. PERFORMED ENGINE EXCEEDANCE PAGE CHECK LIST IAW AMM 71-00-00-740-801- F00, NO EXCEEDANCE NOTED. PERFORMED VISUAL INSPECTION OF THE ENGINE INLET AND TAILPIPE IAW AMM 71-00-00-802-F00, NO FAULTS NOTED. PERFORMED IDLE ENGINE RUN, NO FAULTS NOTED. OK TO CONTINUE.