What was found
AT GLIDESLOPE / LOCALIZER INTERCEPT W/ AP ENGAGED, HAD THE AIRSPEED TAPE (RED) JUMP UP 10 KTS, CAUSING AN A/S LOW MESSAGE AND STICK SHAKER. WE PERFORMED A GO-AROUND, FLAPS 40, NORMAL APPROACH & LANDING ON NEXT ATTEMPT.(<P>PERFORMED DFCS BITE. NO FAULTS FOUND IAW AMM 22-11-00. PERFORMED ADIRS SYS OPS PER AMM 34-21-00. NO FAULTS. PERFORMED LAND VERIFY COMPLETE TEST PER AMM 22-11-00, ALL TESTS PASSED. A/P OK FOR FURTHER SERVICE IAW AMM 22-11-00.</P>)