NTSB Identification: ERA12IA582
14 CFR Part 91: General Aviation
Incident occurred Friday, September 28, 2012 in Teterboro, NJ
Probable Cause Approval Date: 09/12/2013
Aircraft: LEARJET INC 60, registration: N862PA
Injuries: 2 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

After pretakeoff checks revealed no anomalies, the pilots taxied the airplane to the runway for takeoff. Shortly after beginning the takeoff roll, they received an aural warning, and the nosegear steering disconnect light illuminated on the master caution panel. The airplane veered left, and the pilots aborted the takeoff. The airplane’s nose landing gear and left main landing gear exited the left side of the runway, where the airplane came to rest undamaged. During postincident maintenance and troubleshooting, the airplane’s nosewheel steering computer was replaced, and subsequent taxi tests confirmed normal operation of the steering. The removed nosewheel steering computer was sent to the manufacturer’s facility for further testing, where it performed within specifications. The unit’s history log indicated repeated attempts to calibrate the unit and ultimately a failure of the strut servo. However, the failure could not be replicated in postincident tests.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

Failure of the nosewheel steering computer strut servo for reasons that could not be determined or replicated during postincident testing.

Full narrative available

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