What was found
AUTO SPEEDBRAKE CAUTION MESSAGE ACCORDING TO THE CREW, AUTO SPEEDBRAKE OVHD ANNUNCIATOR WAS ILLUMINATED FOR THE DURATION OF THE FLIGHT; ANNUNCIATOR IS NOT CURRENTLY ILLUMINATED. AUTO SPEEDBRAKES WERE DISARMED FOR LANDING WITH THE SPEEDBRAKE LEVER IN THE DOWN POSITION, HOWEVER SPEEDBRAKES DID EVIDENTLY DEPLOY. FOUND SAC AUTOSTOW FAULT AND SPEED BRAKES DO NOT ARM LIGHTS ILLUMINATED. T/S IRW FIM 27-62-01-700-801C2. SUSPECTED SAC TO BE AT FAULT. R&R SAC IRW AMM 27-62-00. OPS CHECKS GOOD. NO FAULTS NOTED ON SAC. AUTOSTOW GROUND TEST PERFORMED IRW AMM 27-62-00-700-801C3. NO FAULTS NOTED, OPS CHECKS GOOD. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1080870 SN OFF 0081 CONTROLLER, AUT OFF 75-2762-9-9002 0081 ON 75-2762-9-9002 0093.