As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE MECHANIC FOUND DURING A ROUTINE INSPECTION, A LARGE AMOUNT OF METAL ON THE TRANSMISSION CHIP DETECTOR. THE ACFT WAS PULLED FROM SERVICE. THERE HAVE BEEN MULTIPLE CHIP EVENTS FOR THIS TRANSMISSION LEADING UP TO THIS CURRENT EVENT. THIS ACFT IS CURRENTLY OUT OF SERVICE AWAITING A TRANSMISSION REPLACEMENT.