Loss of oil pressure due to a leak results in a diversion to a nearby airport for B757-200.

Attributes
ACN	778575
Time
Date	200803
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	msl single value : 36000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 7100 flight time type : 180
ASRS Report	778575
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : oil pressure ind. other flight crewa
Resolutory Action	flight crew : diverted to another airport flight crew : landed as precaution
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

En route to slc while cruising at FL360; the captain and I noticed a flickering 'right engine oil press' caution light. Oil pressure on the indicator was in normal range; but fluctuating. The oil quantity indicator was indicating alternately between a 'zero' and an open box. Oil pressure on EICAS began to decrease. The captain turned ATC over to me after reading the 'oil press' checklist and initiated a call to maintenance control. Maintenance advised us to run the #2 engine at idle. We disconnected the autothrottles and reduced the #2 engine thrust to idle. Oil pressure stabilized between 90-95 but was still fluctuating. I asked ATC for a lower altitude. Maintenance asked the captain if we could make it to ZZZ1 or ZZZ2. After checking WX; the captain decided to divert into ZZZ; which was close; and had a maintenance facility; and was reporting WX of 9 SM; 6000 ft broken; and 8000 ft overcast. ZZZ3 WX was 1 1/2 mi and snow. An emergency was not declared because the engine was both running and stabilized. After conducting the ILS via radar vectors into ZZZ; we taxied clear of the active runway; shut down the #2 engine and taxied on our left engine to gate where we were met by the fire department to inspect our engine. Postflt examination found oil leaking from right engine.

Original NASA ASRS Text

Title: LOSS OF OIL PRESSURE DUE TO A LEAK RESULTS IN A DIVERSION TO A NEARBY ARPT FOR B757-200.

Narrative: ENRTE TO SLC WHILE CRUISING AT FL360; THE CAPT AND I NOTICED A FLICKERING 'R ENG OIL PRESS' CAUTION LIGHT. OIL PRESSURE ON THE INDICATOR WAS IN NORMAL RANGE; BUT FLUCTUATING. THE OIL QUANTITY INDICATOR WAS INDICATING ALTERNATELY BTWN A 'ZERO' AND AN OPEN BOX. OIL PRESSURE ON EICAS BEGAN TO DECREASE. THE CAPT TURNED ATC OVER TO ME AFTER READING THE 'OIL PRESS' CHKLIST AND INITIATED A CALL TO MAINT CTL. MAINT ADVISED US TO RUN THE #2 ENG AT IDLE. WE DISCONNECTED THE AUTOTHROTTLES AND REDUCED THE #2 ENG THRUST TO IDLE. OIL PRESSURE STABILIZED BTWN 90-95 BUT WAS STILL FLUCTUATING. I ASKED ATC FOR A LOWER ALT. MAINT ASKED THE CAPT IF WE COULD MAKE IT TO ZZZ1 OR ZZZ2. AFTER CHKING WX; THE CAPT DECIDED TO DIVERT INTO ZZZ; WHICH WAS CLOSE; AND HAD A MAINT FACILITY; AND WAS RPTING WX OF 9 SM; 6000 FT BROKEN; AND 8000 FT OVCST. ZZZ3 WX WAS 1 1/2 MI AND SNOW. AN EMER WAS NOT DECLARED BECAUSE THE ENG WAS BOTH RUNNING AND STABILIZED. AFTER CONDUCTING THE ILS VIA RADAR VECTORS INTO ZZZ; WE TAXIED CLR OF THE ACTIVE RWY; SHUT DOWN THE #2 ENG AND TAXIED ON OUR L ENG TO GATE WHERE WE WERE MET BY THE FIRE DEPT TO INSPECT OUR ENG. POSTFLT EXAM FOUND OIL LEAKING FROM R ENG.

Data retrieved from NASA's ASRS site as of May 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.