As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING SPOILERS DID NOT DEPLOY AUTOMATICALLY FROM THE ARMED POSITION X. F/O MANUALLY DEPLOYED SPOILERS ON ROLL OUT X WE RECEIVED AN AUTO SPEED BRAKE EICAS MSG. DURING INSPECTION, FOUND A PIECE OF PAPER INSIDE AUTOSPEED BRAKE MECHANISM ACTUATOR. PAPER REMOVED AND OPS TEST OK.