As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED EXPERIENCED AC POWER INTERRUPTIONS AND RIGHT CONSTANT SPEED DRIVE OIL PRESSURE LOW LIGHT ILLUMINATED. TRIED TO DISCONNECT RIGHT CSD AND COULD NOT DISCONNECT. FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND RIGHT CONSTANT SPEED DRIVE LEAKING. REPLACED GENERATOR. SYSTEM GROUND CHECK NORMAL OPERATION.