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Crj-900 captain reported a flap overpseed warning after the first officer inadvertently selected flaps 1 degree.
| Attributes | |
| ACN | 1512801 |
| Time | |
| Date | 201801 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZZ.Airport |
| State Reference | FO |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap/Slat Control System |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Speed All Types |
Narrative:
During descent through 18500 ft and at 250 knots the first officer unintentionally selected the flap configuration to 1 degree. The aircraft over speed clacker for flap configuration immediately started sounding. The flaps attempted to go to the 1 degree position although I don't know if they actually deployed. Once we had found out that the flap lever was unintentionally selected to 1 degree we immediately returned it to the zero position. The clacker sounded for a total of about 7 seconds. We then continued and landed uneventfully. I contacted maintenance on the ground for aircraft flap inspection and wrote the aircraft up in the maintenance log for the event.[some causes would be] human factors related aircraft design with respect to flap lever; and first officer's lack of attention with respect to hand motion while operating FMS 2.[I suggest adding a] detent lock function for flaps lever 0 degree position and 1 degree position.
Original NASA ASRS Text
Title: CRJ-900 Captain reported a flap overpseed warning after the First Officer inadvertently selected flaps 1 degree.
Narrative: During descent through 18500 ft and at 250 knots the First Officer unintentionally selected the flap configuration to 1 degree. The aircraft over speed clacker for flap configuration immediately started sounding. The flaps attempted to go to the 1 degree position although I don't know if they actually deployed. Once we had found out that the flap lever was unintentionally selected to 1 degree we immediately returned it to the zero position. The clacker sounded for a total of about 7 seconds. We then continued and landed uneventfully. I contacted maintenance on the ground for aircraft flap inspection and wrote the aircraft up in the maintenance log for the event.[Some causes would be] human factors related aircraft design with respect to flap lever; and First Officer's lack of attention with respect to hand motion while operating FMS 2.[I suggest adding a] detent lock function for flaps lever 0 degree position and 1 degree position.
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.