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Altitude deviation on descent. First officer set 12000 ft in the altitude window, but failed to arm the autoplt altitude mode.
| Attributes | |
| ACN | 335000 |
| Time | |
| Date | 199604 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : eyw |
| State Reference | FL |
| Altitude | msl bound lower : 11500 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : nqx |
| Operator | general aviation : personal |
| Make Model Name | Citation I |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : cfi pilot : commercial |
| Experience | flight time last 90 days : 20 flight time total : 1500 flight time type : 140 |
| ASRS Report | 335000 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Descending into key west, we were assigned 12000 ft. My spouse, who is multi-engine rated pilot, but not C500 type rated, normally handles the radios and altitude preselect. She selected 12000 ft in the altitude preselect but didn't arm the autoplt altitude mode. I realized that we hadn't captured the altitude as we were passing 11500 ft, and added pitch and power to correct as the controller called us and told us to level at 10000 ft as we were below assigned altitude due to traffic. (We did have traffic in sight throughout.) I need to doublechk autoplt arming on climbs and dscnts as my wife is not as familiar with the autoplt flight director.
Original NASA ASRS Text
Title: ALTDEV ON DSCNT. FO SET 12000 FT IN THE ALT WINDOW, BUT FAILED TO ARM THE AUTOPLT ALT MODE.
Narrative: DSNDING INTO KEY WEST, WE WERE ASSIGNED 12000 FT. MY SPOUSE, WHO IS MULTI-ENG RATED PLT, BUT NOT C500 TYPE RATED, NORMALLY HANDLES THE RADIOS AND ALT PRESELECT. SHE SELECTED 12000 FT IN THE ALT PRESELECT BUT DIDN'T ARM THE AUTOPLT ALT MODE. I REALIZED THAT WE HADN'T CAPTURED THE ALT AS WE WERE PASSING 11500 FT, AND ADDED PITCH AND PWR TO CORRECT AS THE CTLR CALLED US AND TOLD US TO LEVEL AT 10000 FT AS WE WERE BELOW ASSIGNED ALT DUE TO TFC. (WE DID HAVE TFC IN SIGHT THROUGHOUT.) I NEED TO DOUBLECHK AUTOPLT ARMING ON CLBS AND DSCNTS AS MY WIFE IS NOT AS FAMILIAR WITH THE AUTOPLT FLT DIRECTOR.
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.