What was found
AT MORNING START-UP DURING THE AFCS CHECK, WHEN THE AFCS WAS TURNED ON, THE ROLL EXTENSIBLE LINK STARTED MOVING ERRATICALLY. THE PROBLEM WAS ISOLATED TO THE NR 1 AFCS, AT THIS TIME, THE ROLL LINK STARTED MOVING MORE ERRATICALLY UP AND DOWN. UPON FURTHER TROUBLESHOOTING, FOUND THE PROBLEM WAS IN THE 'AIR SENSING' SIDE OF THE NR 1 AFCS COMPUTER. THE COMPUTER WAS REPLACED AND OPS CHECKED GOOD.