Narrative:

During cruise flight; night VMC; on training ferry-leg to home base; the gear warning horn sounded; and unsafe/in-transition gear annunciation illuminated. There was no loss in performance; and no other abnormalities associated with hydraulic system; or unscheduled gear extension. The configuration of the aircraft had not changed. Uncharacteristic split in power levers during cruise was noted during previous legs. Approaches had been faster than anticipated; and landings had been poor. After a short while; it was determined that the gear warning had occurred due to a micro-switch within the power quadrant; closing the circuit for the gear warning system. This normally occurs when the power lever is retarded for descent to landing. It was assumed the power lever had moved back; very slightly; during cruise flight due to vibration etc. The gear warning ceased when the power lever was moved forward very slightly; with no change of engine performance (within play); and engine friction locks were tightened slightly. Engine parameters were noted and compared to performance data in the aom; which indicated normal cruise values. A picture was taken of the power lever split to aid maintenance; after the gear warning had been silenced. I briefed my co-pilot (pilot flying under training); that landing may be difficult and that linkage between the power lever and engine may have been compromised. We planned to check idle power setting during cruise descent in preparation for approach to landing. An uneventful descent to landing occurred. Once clear of the runway; I took control of the aircraft; and noted that at idle; the left engine showed 1050 RPM; and the right engine showed 1500 RPM; with approximately 15% torque (enough to power a turn). The right engine power lever was brought back to ground fine stop; and RPM decreased to 1050 RPM. No reverse was available on the right engine. The discrepancy was written up.

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Original NASA ASRS Text

Title: A BE350 Flight Crew received an unwarranted gear unsafe annunciation due to misaligned thrust levers.

Narrative: During cruise flight; night VMC; on training ferry-leg to home base; the gear warning horn sounded; and unsafe/in-transition gear annunciation illuminated. There was no loss in performance; and no other abnormalities associated with hydraulic system; or unscheduled gear extension. The configuration of the aircraft had not changed. Uncharacteristic split in power levers during cruise was noted during previous legs. Approaches had been faster than anticipated; and landings had been poor. After a short while; it was determined that the gear warning had occurred due to a micro-switch within the power quadrant; closing the circuit for the gear warning system. This normally occurs when the power lever is retarded for descent to landing. It was assumed the power lever had moved back; very slightly; during cruise flight due to vibration etc. The gear warning ceased when the power lever was moved forward very slightly; with no change of engine performance (within play); and engine friction locks were tightened slightly. Engine parameters were noted and compared to performance data in the AOM; which indicated normal cruise values. A picture was taken of the power lever split to aid maintenance; after the gear warning had been silenced. I briefed my co-pilot (pilot flying under training); that landing may be difficult and that linkage between the power lever and engine may have been compromised. We planned to check idle power setting during cruise descent in preparation for approach to landing. An uneventful descent to landing occurred. Once clear of the runway; I took control of the aircraft; and noted that at idle; the left engine showed 1050 RPM; and the right engine showed 1500 RPM; with approximately 15% torque (enough to power a turn). The right engine power lever was brought back to ground fine stop; and RPM decreased to 1050 RPM. No reverse was available on the right engine. The discrepancy was written up.

Data retrieved from NASA's ASRS site as of April 2012 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.