As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR DATA COMPUTER TEST RIGHT HAS STRANGE GRINDING SOUND. TROUBLESHOT SYSTEM FOUND SPEED BRAKE AUTO STOW ACTUATOR (MOTOR) AT FAULT. PLACED AUTO SPEED BRAKE SYSTEM ON MEL. COMPLIED WITH DDPG. RDF-P :REPLACED ACTUATOR 563-920 1, STILL HAVE GRINDING NOISE. FOUND SPEED BRAKE ACTUATOR 560-9613 MAKING NOISE. AUTO SPEED BRAKE ACTUATOR WAS REPLACED. REPLACED AUTOSTOW ACTUATOR, TEST OKAY.