As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LT CSD TEMP WAS HIGH ON CLIMBOUT. DISCONNECTED CSD. CREW WAS UNABLE TO START THE APU SO MADE AN UNSCHEDULED LANDING AT DFW. CORRECTIONS TO THE CSD WERE DEFERRED PER MEL. RESET APU CIRCUIT BREAKERS AND APU STARTED AND OPERATED NORMALLY. CHECK-C 2-5-00 JFK. ---OPEN---