As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA-JFK - APPROXIMATELY 45 MINUTES DURING CRUISE, NR 1 CADC POWER C/B OPENED. C/B RESET PER FHB PROCEDURES. C/B OPENED AGAIN AND WAS LEFT OPENED FOR DURATIONOF FLIGHT. NY MAINTENANCE CONTROL DIVERT A/C TO MIA. REMOVED AND REPLACED NR 1 CADC OPERATION CHECKED FOUND TO BE SATISFACTORY IAW B747 MM 34-12-01. (M)