As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INFLIGHT T1363/24SEP. LT ENGINE GENERATOR OFF LINE. AUXILIARY POWER UNIT (APU) WOULD NOT COME ON LINE. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED LT CONSTANT SPEED DRIVE AND GENERATOR. APU REPLACED ON 24 SEP AT DFW. SYSTEM GROUND CHECKED NORMAL OPS.