As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4893 - ON APPROACH FLAPS WOULD NOT EXTEND FOLLOW ABNORMAL PROCEDURE FOR FLAPS FAULT. MAINTENANCE REMOVED AND REPLACED FLAP CONTROL VALVE IAW SAAB MM 27-51-15. OPS CHECK WAS GOOD AND AIRCRAFT WAS RELEASED FOR A FUNCTIONAL CHECK FLIGHT. FCF WAS SATISFACTORY AND AIRCRAFT WAS RETURNED TO SERVICE. (M)