What was found
SHORTLY AFTER TAKE-OFF, THE T/R CHIP CAUTION LIGHT ILLUMINATED IN CRUISE FLIGHT. THE PILOT PERFORMED ONE FUZZ BURNER ACTIVATION, BUT THE LIGHT CAME BACK ON. HE RETURNED TO BASE AND LANDED UNEVENTFULLY. MECHANIC CHECKED INT AND T/R GEARBOX CHIP PLUGS AND FOUND ONLY NORMAL FUZZ. HE CHANGED THE OIL IN BOTH GEARBOXES AND PERFORMED A 10-MINUTE GROUND RUN AT FLIGHT IDLE. BOTH PLUGS WERE CHECKED AND FOUND CLEAN. AIRCRAFT WAS RETURNED TO SERVICE WITH NO FURTHER ISSUES.