As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK, LANDING GEAR WOULD NOT RETRACT AFTER TAKE OFF. SPEED BRAKE WAS NOT ARMED FOR LANDING, BUT IT AUTO DEPLOYED ANYWAY ON LANDING. OVERWEIGHT LANDING AT 128500. FAULT CODE 31-51001. FOUND GROUND SPOILER INTERLOCK CABLE SLEEVE DISCONNECTED. REPAIRED CABLE ASSEMBLY PER MM.