What was found
DURING FLIGHT THE PILOT HAD A CHIP LIGHT INDICATION. UPON INSPECTION, THE CHIP PLUG HAD LITTLE DEBRIS AND SMUDGE. THE CHIP WAS CLEANED, REINSTALLED AND FURTHER GROUND RUNS WHERE CARRIED OUT PRIOR TO FLIGHT. NO FURTHER ISSUES WERE NOTED AND THE FLIGHT CONTINUED. A FEW HOURS LATER ANOTHER CHIP LIGHT HAD ILLUMINATED. THE AIRCRAFT WAS RETURNED TO THE BASE VIA TRUCK AND TRAILER. FURTHER INVESTIGATION REVEALED FWD CHIP PLUG HAD METAL EVIDENT ON THE PLUG. THE COMPRESSOR WAS REMOVED AND THE NR 1 BEARING INNER RACE SHOWED EVIDENCE OF SPALLING. THE GEARBOX ALSO HAD AN ISSUE ADDRESSED BY ANOTHER SDR RELATED TO THIS AIRCRAFT. WILL SUBMIT PICTURES WHEN THEY ARE AVAILABLE. (TC# 20080227007)