As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/ALB - FLT 6556 - DURING CLIMB-OUT AT 1255 HRS ON 4-21-96, RETURNED TO IAD DUE TO THE STALL WARNING AND STICK SHAKER ACTIVATING DURING THE CLIMB-OUT. AIRCRAFT RETURNED TO IAD WITH NO FURTHER INCIDENTS. MAINTENANCE ADJUSTED THE LT AND RT STALL WARNING SIGNAL SUMMING UNITS. (X)