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Emb-120 captain reported a flap disagreement during a maintenance test flight.
| Attributes | |
| ACN | 1761102 |
| Time | |
| Date | 202009 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | Marginal |
| Aircraft 1 | |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Component | |
| Aircraft Component | Flap/Slat Control System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
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.
Original NASA ASRS Text
Title: EMB-120 Captain reported a flap disagreement during a maintenance test flight.
Narrative: 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.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.