As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE FLIGHT HAD T/R CHIP LIGHT ILLUMINATE CAUSING A UNSCHEDULED LANDING. REMOVED & EXAMINED MAGNETIC CHIP PLUG. SMALL HAIR LIKE METAL SLIVER FOUND. CLEANED & RE-INSTALLED PLUG & STILL HAD CAUTION LIGHT. CHECKED WIRING & FOUND TO BE SERVICEABLE. FOLLOWED PROCEDURES FOR GEARBOX FLUSH IN MM CH 65 FOR INSPECTION & SERVICEABILITY CHECK. FOUND TO BE SERVICEABLE SO RE-SERVICED IAW MM CH 12. GND RAN ACFT WITH NO FURTHER LIGHT. ACFT WAS FOUND TO BE AIRWORTHY SO RETURNED IT TO SERVICE.