As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: SHORTLY AFTER REACHING CRUISE AT FL320 BOTH FMCS SUDDENLY AND SIMULTANEOUSLY FAILED, BOTH NAV DISPLAYS BLANKED,AND THE AUTOPILOT )A)) DEFAULTED TO CWS IN BOTH PITCH AND ROLL AFTER 30 SECONDS BOTH FMCS RETURNED TO NORMAL OPERATION. REPLACED FMC #1 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER FIM 34-61-00-810-827.