A lear 24 atx cargo pilot had a takeoff aborted due to a flight control problem.

Attributes
ACN	356254
Time
Date	199612
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : orl
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air taxi
Make Model Name	Learjet 24
Operating Under FAR Part	Part 135
Flight Phase	climbout : takeoff other other
Flight Plan	IFR
Aircraft 2
Make Model Name	Learjet 24
Operating Under FAR Part	Part 135
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 3500 flight time type : 500
ASRS Report	356254
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical conflict : ground critical other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : rejected takeoff
Consequence	faa : investigated Other
Supplementary
Primary Problem	Aircraft

Narrative:

During the attempted takeoff, at vr, the aircraft would not respond to my flight control inputs and did not rotate. Therefore, I aborted the takeoff. The aircraft exited the end of the runway stopping approximately 20 ft into the grass. There was no damage to the aircraft and no injuries. Callback conversation with the reporter revealed the following: the control problem was caused by a faulty potentiometer that directed the elevator trim to go full nose down. The FAA investigated this and called it an incident. The reporter is now flying for a major air carrier.

Original NASA ASRS Text

Title: A LEAR 24 ATX CARGO PLT HAD A TKOF ABORTED DUE TO A FLT CTL PROB.

Narrative: DURING THE ATTEMPTED TKOF, AT VR, THE ACFT WOULD NOT RESPOND TO MY FLT CTL INPUTS AND DID NOT ROTATE. THEREFORE, I ABORTED THE TKOF. THE ACFT EXITED THE END OF THE RWY STOPPING APPROX 20 FT INTO THE GRASS. THERE WAS NO DAMAGE TO THE ACFT AND NO INJURIES. CALLBACK CONVERSATION WITH THE RPTR REVEALED THE FOLLOWING: THE CTL PROBLEM WAS CAUSED BY A FAULTY POTENTIOMETER THAT DIRECTED THE ELEVATOR TRIM TO GO FULL NOSE DOWN. THE FAA INVESTIGATED THIS AND CALLED IT AN INCIDENT. THE RPTR IS NOW FLYING FOR A MAJOR ACR.

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.