As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT AFTER ENGINE START DURING FLIGHT CONTROL TESTS, A SPEEDBRAKE/ROLL SPOILER POSITION INDICATION AMBER FAULT AT ALL POSITIONS. THE SYSTEM WAS DISABLED AND OPERATIONS WERE CONTINUED PER A 10 DAY MEL 27-60-02. DURNING THE MAINTENANCE EVENT TO REPAIR THE SYSTEM THE LEFT SPEED BRAKE POSITION SENSOR WAS FOUND DEFECTIVE. THE SENSOR WAS REPLACED WITH A NEW UNIT. OPS CHECKS WERE SATISFACTORY, AND THE AIRCRAFT WAS RETURNED TO SERVICE.