What was found
DTW - FLT 566 - AT 8000 FEET AUTO-PILOT PULSED AS F/O ALTIMETER OSCILLATED PLUS/MINUS 20. THIS CONTINUED UNTIL AUTOPILOT WAS DISENGAGED, YOKE ALSO PULSED. REMOVED AIR DATA COMPUTER, CLEANED CONNECTORS, REINSTALLED SAME, PERFORMED AIR DATA INSTRUMENT AND ALTIMETER PITOT STATIC IAW MM 34-10-0 AND 34-10-6. AUTO-PILOT OPS CHECK SATISFACTORY IAW MM 22-10-5. (M)