As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT EXPERIENCED A COCKPIT MGB CHIP LIGHT AFTER ENGINE START AND BEFORE TAKE-OFF. SERVICEABILITY CHECKS AND MGB OIL FLUSH WAS ACCOMPLISHED AND AIRCRAFT RETURNED TO AIRWORTHY CONDITION AND RELOCATED TO MAINTENANCE FACILITY IAW AMM AND ASB EC135-63A-012. DURING THE POST CHIP EVENT REQUIRED INSPECTIONS OF THE MGB INPUT DRIVE PINION ASSEMBLIES PITTING WAS FOUND ON THE TEETH.