SF 340B
Flight Crew Air Transport Pilot (ATP)
Human-Machine Interface; Troubleshooting
Aircraft Equipment Problem Less Severe
Flight Crew Rejected Takeoff; General Maintenance Action; General Flight Cancelled / Delayed
Aircraft
We added power; armed the CTOT/APR [Constant Torque On Takeoff/Automatic Power Reserve functions] and rolled down the runway. At around 100 KIAS we received a configuration warning at which time we executed a rejected takeoff and exited the runway.We immediately discovered the problem; the Condition Levers [CLs] had vibrated just below their acceptable position and caused the warning even though the friction lock was firmly in place. We started a timer; taxied to the ramp; and consulted with Maintenance Control; Dispatch and the Chief Pilot. We determined that it was not a high energy abort because; according to our manuals; we used reverse and only normal braking and were only required to wait 15 minutes for brake cooling before attempting another takeoff. However; our Duty Manager instructed us to write up the event and Contract Maintenance came out to the aircraft and determined the Condition Levers had 'spring back'; suggested that a re-rig be done at some point and signed off the aborted takeoff.
The Condition Lever rigging was rigged in such close tolerance that when pushed full forward to max they actually had a little spring back. With the friction lock on full holding the levers in this position should have prevented the issue; however; it much have just been right on the edge of its tolerance.
A Saab 340 flight crew rejected their takeoff around 100 KIAS upon receipt of a configuration warning due to improperly set condition levers.