<< >> NASA ASRS Report 1067024, February 2013

Falcon 2000 easy aircraft began an abrupt climb from assigned altitude. Autoflight system malfunction was cited as contributor to the event.

Attributes
ACN	1067024
Time
Date	201302
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Falcon 2000
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Autoflight System
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 90 Flight Crew Total 15000 Flight Crew Type 229
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance

Narrative:

While cruising at FL430; with the autopilot engaged on the left side; the aircraft began an abrupt climb. I saw a cco (cursor control device) failure on the EICAS message screen and looked at my altimeter which read 29.72 and was climbing thru 42;200 ft. I disengaged the autopilot and looked at the co-pilot's altimeter which now read 43;700 ft. ATC inquired what our altitude was as I started a descent back down to FL430 on the co-pilot altimeter. I engaged the autopilot on the right side and switched the cco to the right side. We told ATC what happened and confirmed we were at FL430.

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Original NASA ASRS Text

Title: Falcon 2000 EASY aircraft began an abrupt climb from assigned altitude. Autoflight system malfunction was cited as contributor to the event.

Narrative: While cruising at FL430; with the autopilot engaged on the left side; the aircraft began an abrupt climb. I saw a CCO (Cursor Control Device) failure on the EICAS message screen and looked at my altimeter which read 29.72 and was climbing thru 42;200 FT. I disengaged the autopilot and looked at the co-pilot's altimeter which now read 43;700 FT. ATC inquired what our altitude was as I started a descent back down to FL430 on the co-pilot altimeter. I engaged the autopilot on the right side and switched the CCO to the right side. We told ATC what happened and confirmed we were at FL430.

Data retrieved from NASA's ASRS site as of July 2013 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.