BE350 pilot reports low engine oil pressure at FL180. Reporter elects to shut down the engine and di...

Attributes
ACN	819497
Time
Date	200901
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Super King Air 350
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Oil Line
Person 1
Function	Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 10 Flight Crew Total 5918 Flight Crew Type 305
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance

Narrative:

At FL180 about 50 miles north of ZZZ we had a red warning flasher go off. It was for a 'right engine low oil pressure.' I checked the corresponding gauge and saw that the pressure had dropped to about 60 psi. At that point you can reduce power on that engine and continue to fly. I thought the best course of action would be to secure the engine and divert to an airport where I could have maintenance look at it. All the shutdown steps were performed according to the checklists. Also; there were no passengers on board. We told ATC that we had a precautionary engine shutdown; and they gave us a new clearance to ZZZ2. We did not declare an emergency. We landed without incident and maintenance personnel found an oil hose that was not fully tightened after being replaced by a previous maintenance company. The maintenance people at ZZZ cleaned the engine and tightened the hoses and ran and checked the airplane and signed it off as back in service. The hose in question was originally installed by maintenance prior to the shutdown as required service to fulfill a 5 year time limit on the engine oil hoses.

Original NASA ASRS Text

Title: BE350 pilot reports low engine oil pressure at FL180. Reporter elects to shut down the engine and divert for maintenance. An oil line which had recently been replaced during scheduled maintenance was found to be leaking.

Narrative: At FL180 about 50 miles north of ZZZ we had a red warning flasher go off. It was for a 'right engine low oil pressure.' I checked the corresponding gauge and saw that the pressure had dropped to about 60 PSI. At that point you can reduce power on that engine and continue to fly. I thought the best course of action would be to secure the engine and divert to an airport where I could have maintenance look at it. All the shutdown steps were performed according to the checklists. Also; there were no passengers on board. We told ATC that we had a precautionary engine shutdown; and they gave us a new clearance to ZZZ2. We did not declare an emergency. We landed without incident and maintenance personnel found an oil hose that was not fully tightened after being replaced by a previous maintenance company. The maintenance people at ZZZ cleaned the engine and tightened the hoses and ran and checked the airplane and signed it off as back in service. The hose in question was originally installed by Maintenance prior to the shutdown as required service to fulfill a 5 year time limit on the engine oil hoses.

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.