A BE02 is mandated to return land at den when the crew notes a fluctuating oil pressure on #1 engine...

Attributes
ACN	399855
Time
Date	199804
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den
State Reference	CO
Altitude	msl bound lower : 22000 msl bound upper : 22000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zdv
Operator	common carrier : air carrier
Make Model Name	Beech 1900
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude landing other other
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 250 flight time total : 5500 flight time type : 3100
ASRS Report	399855
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 3600 flight time type : 1200
ASRS Report	399853
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Flight from den to rks. During the climb on the yellowstone 1 departure, we noticed the oil pressure fluctuating between 65 psi and 95 psi on the left engine. The power was reduced to below 2000 ft pounds of torque on the affected engine, and we requested a return to the field. No emergency was declared, and the remainder of flight was uneventful.

Original NASA ASRS Text

Title: A BE02 IS MANDATED TO RETURN LAND AT DEN WHEN THE CREW NOTES A FLUCTUATING OIL PRESSURE ON #1 ENG.

Narrative: FLT FROM DEN TO RKS. DURING THE CLB ON THE YELLOWSTONE 1 DEP, WE NOTICED THE OIL PRESSURE FLUCTUATING BTWN 65 PSI AND 95 PSI ON THE L ENG. THE PWR WAS REDUCED TO BELOW 2000 FT LBS OF TORQUE ON THE AFFECTED ENG, AND WE REQUESTED A RETURN TO THE FIELD. NO EMER WAS DECLARED, AND THE REMAINDER OF FLT WAS UNEVENTFUL.

Data retrieved from NASA's ASRS site as of July 2007 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.