As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SPEED BRAKES AUTOMATICALLY DEPLOYED IN FLIGHT. A/C LOST 1500 FEET WHILE CAPTAIN STOWED SPEED BRAKES. BOTH PILOTS WERE REQUIRED TO PULL A/C FROM NOSE DOWN ATTITUDE. FOUND SPEED BRAKE LEVER RESISTANCE INCONSISTENT. THE SPEED BRAKE MECHANISM WAS FOUND TO BE BAD.