As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE MAIN TRANSMISSION CHIP LIGHT ILLUMINATED. THE PILOT ADVISED CREW THAT THE MISSION WOULD BE ABORTED AND THEY WOULD LAND. THE PILOT REDUCED POWER AND MONITORED THE TRANSMISSION OIL PRESSURE AND LANDED LANDED SAFELY WITHOUT ANY ADDITIONAL ISSUES (EMERGENCY PROCEDURES WERE USED). AFTER LANDING, MECHANIC INSPECTED THE MGB CHIP DETECTORS. STAGE A CHIP WAS FOUND. MAINTENANCE ACCOMPLISHED UTILIZING ASB EC-135-63A-01 AND RETURNED TO SERVICE WITH NO ADDITIONAL DEFECTS NOTED.