As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN REPORTED THAT DURING CLIMB RT CSD REACH 180 DEGREES (C), BEING NOT POSSIBLE TO SHUTOFF AND R CSD OIL PRESS LOW LIGHT TURNED ON. ADDITIONALLY, DURING DESCEND WHEN THE APU WAS STARTED THE CSD TEMPERATURE COOL DOWN. TECHNICAL PERSONNEL PERFORMED CSD SHUTOFF TESTS CONFIRMING THE FAILURE. CSD AND RADIATOR WERE REPLACED IAW MM 24-10-01 AND 24-10-03 RESPECTIVELY, TESTS WERE CORRECT.