As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AILERONS MOMENTARILY -JAMMED- THE CAPTAIN WAS ABLE TO REGAIN TOTAL CONTROL AND LAND WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE GPWS. MX FOUND ROOT CAUSE TO BE A DISLODGED DISTRIBUTION DUCT THAT BLEW COLD AIR INTO THE INSULATION BLANKET WHICH CAUGHT THE CABLES RESULTING IN INTERMITTENT BINDING.