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BE20 pilot has an altitude excursion when the autoplt altitude hold disconnects after his use of elevator trim. Pilot had not realized that the altitude capture had occurred as the sun was shining on the altitude capture panel light.
| Attributes | |
| ACN | 370850 |
| Time | |
| Date | 199706 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : pbi |
| State Reference | FL |
| Altitude | msl bound lower : 15000 msl bound upper : 15400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma |
| Operator | general aviation : corporate |
| Make Model Name | Super King Air 200/Huron |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 77 flight time total : 2649 flight time type : 1575 |
| ASRS Report | 370850 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance flight crew : became reoriented |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
I was given clearance to climb to 15000 ft from 13000 ft. I had put the plane on autoplt. The sun was glaring on the annunciators showing altitude capture and I inadvertently trimmed the plane when the altitude had already been captured and of course took the plane off of altitude hold. I didn't recognize I had done this till the altitude warning went off at 15300 ft. I arrested the climb at 15400 ft and almost immediately center cleared us up to 16000 ft. We leveled off at 16000 ft with no further problem. In the future I'll always be certain to be sure even when I'm on autoplt to see that the plane is actually doing what I want it to.
Original NASA ASRS Text
Title: BE20 PLT HAS AN ALT EXCURSION WHEN THE AUTOPLT ALT HOLD DISCONNECTS AFTER HIS USE OF ELEVATOR TRIM. PLT HAD NOT REALIZED THAT THE ALT CAPTURE HAD OCCURRED AS THE SUN WAS SHINING ON THE ALT CAPTURE PANEL LIGHT.
Narrative: I WAS GIVEN CLRNC TO CLB TO 15000 FT FROM 13000 FT. I HAD PUT THE PLANE ON AUTOPLT. THE SUN WAS GLARING ON THE ANNUNCIATORS SHOWING ALT CAPTURE AND I INADVERTENTLY TRIMMED THE PLANE WHEN THE ALT HAD ALREADY BEEN CAPTURED AND OF COURSE TOOK THE PLANE OFF OF ALT HOLD. I DIDN'T RECOGNIZE I HAD DONE THIS TILL THE ALT WARNING WENT OFF AT 15300 FT. I ARRESTED THE CLB AT 15400 FT AND ALMOST IMMEDIATELY CTR CLRED US UP TO 16000 FT. WE LEVELED OFF AT 16000 FT WITH NO FURTHER PROB. IN THE FUTURE I'LL ALWAYS BE CERTAIN TO BE SURE EVEN WHEN I'M ON AUTOPLT TO SEE THAT THE PLANE IS ACTUALLY DOING WHAT I WANT IT TO.
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.