As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T1436/14JUN - RIGHT ENGINE CONSTANT SPEED DRIVE LOW OIL PRESSURE LIGHT ILLUMINATED. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED RIGHT CONSTANT SPEED DRIVE AND RIGHT GENERATOR. SYSTEM GROUND CHECKED NORMAL OPERATION.