Narrative:

Leveled off at cruise. Cruise checks performed. During normal scan of engine instruments, captain/PIC noticed right engine oil pressure at maximum on gauge, in excess of 100 psi which is also red line (upper limit). Reduced power on affected engine. No change in oil pressure indication. All other engine indications for affected engine normal and within acceptable parameters. Captain assumed control of aircraft from first officer, and announced right engine would be shut down. Captain called out memory items in accordance with company procedure, right engine shutdown. First officer completed shutdown checklist and right engine secured. Captain contacted center. Informed ATC of shutdown and declared emergency. Aircraft cleared to land straight in, visual at south bend, in. Checklists performed, aircraft configured to land, crash fire rescue equipment equipment requested. Single engine landing was uneventful and according to procedure, no reverse pitch used. Full length of runway used. Aircraft taxied clear and to gate. Passenger deplaned and aircraft inspected by maintenance. Although all other engine indications were normal at time high oil pressure noticed, captain elected precautionary shutdown to avoid possibility of damage to engine and/or engine fire. Ultimately, maintenance revealed problem was bad transmitter to engine oil pressure gauge.

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Original NASA ASRS Text

Title: FLC OF AN MDT ACFT DIVERTED TO LAND DUE TO SHUTTING DOWN 1 ENG DURING CRUISE FOR 'HIGH OIL PRESSURE.'

Narrative: LEVELED OFF AT CRUISE. CRUISE CHKS PERFORMED. DURING NORMAL SCAN OF ENG INSTS, CAPT/PIC NOTICED R ENG OIL PRESSURE AT MAX ON GAUGE, IN EXCESS OF 100 PSI WHICH IS ALSO RED LINE (UPPER LIMIT). REDUCED PWR ON AFFECTED ENG. NO CHANGE IN OIL PRESSURE INDICATION. ALL OTHER ENG INDICATIONS FOR AFFECTED ENG NORMAL AND WITHIN ACCEPTABLE PARAMETERS. CAPT ASSUMED CTL OF ACFT FROM FO, AND ANNOUNCED R ENG WOULD BE SHUT DOWN. CAPT CALLED OUT MEMORY ITEMS IN ACCORDANCE WITH COMPANY PROC, R ENG SHUTDOWN. FO COMPLETED SHUTDOWN CHKLIST AND R ENG SECURED. CAPT CONTACTED CTR. INFORMED ATC OF SHUTDOWN AND DECLARED EMER. ACFT CLRED TO LAND STRAIGHT IN, VISUAL AT SOUTH BEND, IN. CHKLISTS PERFORMED, ACFT CONFIGURED TO LAND, CFR EQUIP REQUESTED. SINGLE ENG LNDG WAS UNEVENTFUL AND ACCORDING TO PROC, NO REVERSE PITCH USED. FULL LENGTH OF RWY USED. ACFT TAXIED CLR AND TO GATE. PAX DEPLANED AND ACFT INSPECTED BY MAINT. ALTHOUGH ALL OTHER ENG INDICATIONS WERE NORMAL AT TIME HIGH OIL PRESSURE NOTICED, CAPT ELECTED PRECAUTIONARY SHUTDOWN TO AVOID POSSIBILITY OF DAMAGE TO ENG AND/OR ENG FIRE. ULTIMATELY, MAINT REVEALED PROB WAS BAD XMITTER TO ENG OIL PRESSURE GAUGE.

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.