DHC100 first officer reports a rejected takeoff after the captain's IAS overspeed warning sounds and...

Narrative:

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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1000579
Time
Date	201203
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Dash 8-100
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Component
Aircraft Component	Air Data Computer
Person 1
Function	First Officer Pilot Not Flying
Events
Anomaly	Aircraft Equipment Problem Critical

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.