As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE CHIP DETECTOR FOUND WITH CONTAMINATION. ACFT GROUNDED. DETERMINED MATERIAL TO BE MAGNETIC M-50 BEARING METAL. TECH SERVICES CONFIRMED AND VERIFIED, INITIATED INVESTIGATION AT STEP 7B, EXAMINE ENGINE STARTER MAG PLUG REF AMM 79-00-00-200-804-F00. PERFORMED INSPECTION OF ENGINE STARTER MAG PLUG, AND FOUND CLEAN. INSPECTED TGB FOR INTERNAL DAMAGE, NO DAMAGE NOTED. REMOVED THE NR 1 ENGINE IAW T/C 78471000. INSTALLED NR 1 ENGINE.