Narrative:

During climb and performing the 18;000 ft climb check; I noticed the right engine oil pressure well above its high red line limit and indicating 120 psi. I scanned the other instruments for any other erroneous or confirming indications; all other engine instruments appeared normal. I identified the indication to first officer and instructed him to verify that there was no checklist item for high oil pressure. Being no checklist item for this indication I instructed the first officer to notify center for the need to make a precautionary return to [departure airport].after receiving re-routing instruction I requested the first officer to inform the passenger that we were returning and to remain belted in. I reduced thrust on the right engine to idle to see if the indication would return to a normal range which it did not. After allowing the engine to stabilize at idle for approximately 3 minutes it remained at 90 psi at which point in good VFR conditions and no other extenuating factors. I elected to shut down that engine prior to it becoming a more serious issue and called for the engine shutdown in flight checklist and secured the engine. [Advised] ATC and continued with the return with the single engine approach and landing checklist with no further incident. After offloading the passenger I examined the right engine and discovered the lower cowling to be covered with fresh oil and oil dripping from the generator cooling vent.

Related reports:

Google
 

Original NASA ASRS Text

Title: BE-400 flight crew reported returning to the departure airport after a precautionary shutdown of the right engine for high oil pressure.

Narrative: During climb and performing the 18;000 ft climb check; I noticed the right engine oil pressure well above its high red line limit and indicating 120 psi. I scanned the other instruments for any other erroneous or confirming indications; all other engine instruments appeared normal. I identified the indication to First Officer and instructed him to verify that there was no checklist item for high oil pressure. Being no checklist item for this indication I instructed the First Officer to notify Center for the need to make a precautionary return to [departure airport].After receiving re-routing instruction I requested the First Officer to inform the passenger that we were returning and to remain belted in. I reduced thrust on the right engine to idle to see if the indication would return to a normal range which it did not. After allowing the engine to stabilize at idle for approximately 3 minutes it remained at 90 psi at which point in good VFR conditions and no other extenuating factors. I elected to shut down that engine prior to it becoming a more serious issue and called for the engine shutdown in flight checklist and secured the engine. [Advised] ATC and continued with the return with the single engine approach and landing checklist with no further incident. After offloading the passenger I examined the right engine and discovered the lower cowling to be covered with fresh oil and oil dripping from the generator cooling vent.

Data retrieved from NASA's ASRS site 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.