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At cruise; flight crew of emj look up from administrative tasks to find aircraft in 30 degree right turn. They discover that the autoplt turn knob had been inadvertently activated to the full right position.
| Attributes | |
| ACN | 648201 |
| Time | |
| Date | 200502 |
| Place | |
| Locale Reference | navaid : hro.vor |
| State Reference | AR |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Embraer Jet Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 648201 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 648200 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overrode automation flight crew : regained aircraft control flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
Narrative:
I was pilot flying. We were direct hro. We were both looking at our flight plan to determine how late we were. I looked up and the aircraft was in a nearly 30 bank turn to the right. I quickly disconnected the autoplt and turned left back on course. The first officer noticed that the turn knob was turned fully to the right. One of us had bumped it unknowingly. The amber tknb annunciation is no longer displayed on the pfd. Supplemental information from acn 648200: I noticed that the turn knob was turned to the full right and may have inadvertently bumped this control. I have seen this happen before. I believe that the detent is too soft.
Original NASA ASRS Text
Title: AT CRUISE; FLT CREW OF EMJ LOOK UP FROM ADMINISTRATIVE TASKS TO FIND ACFT IN 30 DEG R TURN. THEY DISCOVER THAT THE AUTOPLT TURN KNOB HAD BEEN INADVERTENTLY ACTIVATED TO THE FULL R POSITION.
Narrative: I WAS PLT FLYING. WE WERE DIRECT HRO. WE WERE BOTH LOOKING AT OUR FLT PLAN TO DETERMINE HOW LATE WE WERE. I LOOKED UP AND THE ACFT WAS IN A NEARLY 30 BANK TURN TO THE R. I QUICKLY DISCONNECTED THE AUTOPLT AND TURNED L BACK ON COURSE. THE FO NOTICED THAT THE TURN KNOB WAS TURNED FULLY TO THE R. ONE OF US HAD BUMPED IT UNKNOWINGLY. THE AMBER TKNB ANNUNCIATION IS NO LONGER DISPLAYED ON THE PFD. SUPPLEMENTAL INFO FROM ACN 648200: I NOTICED THAT THE TURN KNOB WAS TURNED TO THE FULL R AND MAY HAVE INADVERTENTLY BUMPED THIS CTL. I HAVE SEEN THIS HAPPEN BEFORE. I BELIEVE THAT THE DETENT IS TOO SOFT.
Data retrieved from NASA's ASRS site as of January 2009 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.