Brasilia EMB-120 All Series
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Troubleshooting
Aircraft Equipment Problem Less Severe
Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
The aircraft was due for an Operational Check Flight after a C check (heavy maintenance). Reaching acceleration altitude; I retracted the flaps from 15 degrees to up and received a Flap Disagreement annunciation. We continued the initial climb and ran the QRH procedure for a Flap Disagreement. The flaps would go back down to the previously selected position normally; but when attempting to again raise the flaps to UP the disagreement returned. Although the flaps were able to extend fully to the landing position (25 degrees) I elected to [request priority handling] and return to ZZZ. ATC was notified and the flight terminated with no further issue.Maintenance said that this issue has been present with this aircraft for many months and although additional trouble shooting and changing of parts the problem continues. Apparently this issue has been troubling Maintenance for some time. They have changed nearly everything in the system and the problem persists. Maintenance has not been able to duplicated the issue on the ground.
EMB-120 Captain reported a flap disagreement during a maintenance test flight.