As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LYH/IAD - FLT 6186 - DURING CLIMB AT 0935 HRS ON 8-11-96, MADE AN UNSCHEDULED LANDING DUE TO NR 1 EADI AIRSPEED INDICATOR INOP. AIRCRAFT RETURNED TO THE GATE, NO FURTHER INCIDENTS. MAINTENANCE RESECURED LOOSE CONNECTOR ON NR 1 ADC, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)