As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS/SWF - FLT 6584 - DURING CLIMB AT 0910 HOURS ON 6-24-98, MADE AN UNSCHEDULED LANDING DUE TO FLAPS DROOPING IN-FLIGHT (UNCONTROLLED). AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED FLAP SELECTOR VALVE. OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (X)