A dash 8 captain reported rejecting takeoff at 90 KTS when an oil pressure warning light on #1 engin...

Narrative:

We taxied out to the runway and took an hour delay for weather. Once we were cleared to go; we taxied out for takeoff. On takeoff roll the #1 engine oil pressure warning light illuminated. The first officer called for the rejected takeoff and I rejected the takeoff. The first officer noted the speed at 90 KTS. Once the power was reduced the warning light went out and I shut down the number one engine once we were clear of the runway. We returned to the gate and called dispatch and maintenance control to inform them of the situation. Contract maintenance was called. The mechanic added four quarts of oil to the engine and checked and cleaned cannon plugs. We did a runup of the engine and everything was normal. It was signed off and we operated the flight.

Original NASA ASRS Text

Title: A Dash 8 Captain reported rejecting takeoff at 90 KTS when an oil pressure warning light on #1 engine illuminated. Returned to the gate where a Mechanic added four quarts of oil. The flight departed with no issues.

Narrative: We taxied out to the runway and took an hour delay for weather. Once we were cleared to go; we taxied out for takeoff. On takeoff roll the #1 engine oil pressure warning light illuminated. The First Officer called for the rejected takeoff and I rejected the takeoff. The First Officer noted the speed at 90 KTS. Once the power was reduced the warning light went out and I shut down the number one engine once we were clear of the runway. We returned to the gate and called Dispatch and Maintenance Control to inform them of the situation. Contract Maintenance was called. The mechanic added four quarts of oil to the engine and checked and cleaned cannon plugs. We did a runup of the engine and everything was normal. It was signed off and we operated the flight.

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.

Attributes
ACN	977530
Time
Date	201110
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Dash 8-100
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Component
Aircraft Component	Turbine Engine
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 5200 Flight Crew Type 4600
Events
Anomaly	Aircraft Equipment Problem Critical

A dash 8 captain reported rejecting takeoff at 90 KTS when an oil pressure warning light on #1 engine illuminated. Returned to the gate where a mechanic added four quarts of oil. The flight departed with no issues.