SF340 flight crew reports rejected takeoff at 90 knots due to fluctuating oil pressure indication.

Attributes
ACN	764674
Time
Date	200712
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzzz.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	SF 340B
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	764674
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
ASRS Report	764675
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : oil press indication other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During takeoff roll after the 80 KTS call but well prior to V1; I noticed the engine oil pressure gauge on the r-hand engine fluctuating; then drop to zero. I immediately called for an abort. The first officer aborted the takeoff with no issues. We cleared the runway and returned to the gate. All other engine indications appeared to be normal. We didn't receive an oil pressure warning light on the cwp.

Original NASA ASRS Text

Title: SF340 FLT CREW REPORTS REJECTED TKOF AT 90 KNOTS DUE TO FLUCTUATING OIL PRESSURE INDICATION.

Narrative: DURING TKOF ROLL AFTER THE 80 KTS CALL BUT WELL PRIOR TO V1; I NOTICED THE ENG OIL PRESSURE GAUGE ON THE R-HAND ENG FLUCTUATING; THEN DROP TO ZERO. I IMMEDIATELY CALLED FOR AN ABORT. THE FO ABORTED THE TKOF WITH NO ISSUES. WE CLRED THE RWY AND RETURNED TO THE GATE. ALL OTHER ENG INDICATIONS APPEARED TO BE NORMAL. WE DIDN'T RECEIVE AN OIL PRESSURE WARNING LIGHT ON THE CWP.

Data retrieved from NASA's ASRS site as of January 2009 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.