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An air carrier E120 flight crew climbed above their assigned altitude because although the pilot flying had set the proper information into the autoplt he neglected to switch the autoplt control to his position.
| Attributes | |
| ACN | 401960 |
| Time | |
| Date | 199805 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : fsd |
| State Reference | SD |
| Altitude | msl bound lower : 12000 msl bound upper : 12600 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6400 flight time type : 400 |
| ASRS Report | 401960 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During flight from fsd to hon on our climb out we overshot our altitude by 500-600 ft. The autoplt was on and it was my leg (copilot). I am a captain with the company, but am right seat qualified and was acting in that capacity. I discovered the discrepancy during my checks, and xchks. The problem occurred because of not properly monitoring the instruments while the autoplt was flying the aircraft. Upon further investigation, we determined that the reason the autoplt overshot the altitude was because the computer was not switched to my side. It is part of the before takeoff checklist to switch the computer to the flying pilot's side, before the takeoff. I remember going through the item on the checklist, but the button must not have been depressed fully. We can learn much from this, especially that while autoplt is flying the aircraft we must not become complacent, and must monitor the aircraft's speed, altitude, and general attitude.
Original NASA ASRS Text
Title: AN ACR E120 FLC CLBED ABOVE THEIR ASSIGNED ALT BECAUSE ALTHOUGH THE PLT FLYING HAD SET THE PROPER INFO INTO THE AUTOPLT HE NEGLECTED TO SWITCH THE AUTOPLT CTL TO HIS POSITION.
Narrative: DURING FLT FROM FSD TO HON ON OUR CLBOUT WE OVERSHOT OUR ALT BY 500-600 FT. THE AUTOPLT WAS ON AND IT WAS MY LEG (COPLT). I AM A CAPT WITH THE COMPANY, BUT AM R SEAT QUALIFIED AND WAS ACTING IN THAT CAPACITY. I DISCOVERED THE DISCREPANCY DURING MY CHKS, AND XCHKS. THE PROBLEM OCCURRED BECAUSE OF NOT PROPERLY MONITORING THE INSTRUMENTS WHILE THE AUTOPLT WAS FLYING THE ACFT. UPON FURTHER INVESTIGATION, WE DETERMINED THAT THE REASON THE AUTOPLT OVERSHOT THE ALT WAS BECAUSE THE COMPUTER WAS NOT SWITCHED TO MY SIDE. IT IS PART OF THE BEFORE TKOF CHKLIST TO SWITCH THE COMPUTER TO THE FLYING PLT'S SIDE, BEFORE THE TKOF. I REMEMBER GOING THROUGH THE ITEM ON THE CHKLIST, BUT THE BUTTON MUST NOT HAVE BEEN DEPRESSED FULLY. WE CAN LEARN MUCH FROM THIS, ESPECIALLY THAT WHILE AUTOPLT IS FLYING THE ACFT WE MUST NOT BECOME COMPLACENT, AND MUST MONITOR THE ACFT'S SPEED, ALT, AND GENERAL ATTITUDE.
Data retrieved from NASA's ASRS site as of July 2007 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.