What was found
AFTER TAKEOFF, NR 1 ENGINE CHIP LIGHT ILLUMINATED, PILOT RETURNED TO RIG. THE MECHANIC REMOVED, CLEANED, AND INSPECTED NR ENGINE CHIP PLUGS. SMALL HAIR LIKE SILVER WAS DISCOVERED. UPON CLEANING THE CHIP PLUGS, COMPLIED WITH GROUND RUN AND LEAK CHECK, NO DISCREPANCY WAS NOTED, AC RETURNED TO SERVICE.