Aircraft Equipment Problem Critical
Flight Crew Rejected Takeoff; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
The Captain was the pilot flying and I was the pilot not flying on this particular leg. After Tower cleared us for takeoff; the Captain advanced the power levers to the normal takeoff position and we began our roll down the runway. As the power levers were set; the overspeed warning horn came on and the Captains altimeter flagged and displayed an altitude of 60;000 FT. In addition; the vertical speed indicator fluctuated between an excessive climb and an excessive descent. Upon detection of the issue; we decided to reject the takeoff and notify ATC of the rejection. As we taxied back to the gate; the overspeed warning horn continued to go off. As soon as we arrived back at the gate; the Captain contacted Operations to notify them of the rejection; and then proceeded to contact Maintenance. In the meantime; we were instructed to deplane the passengers; and proceeded to do so. Shortly after; we were assigned a new aircraft to complete our flight.
DHC100 First Officer reports a rejected takeoff after the Captain's IAS overspeed warning sounds and his altimeter shows 60;000 FT. During the taxi back to the gate the overspeed warning continues to sound.