What was found
AT CRUISE AT FL280, RECEIVED RT ENG OIL PSI WARNING MESSAGE. OIL PSI WAS FLUCTUATING IN THE GREEN BAND. C/W QRH. REDUCED POWER TO IDLE. DIVERTED TO ICT. AROUND 8,000FT, OIL PSI WENT INTO THE RED AND REMAINED THERE FOR THE REST OF THE FLIGHT. SHUT ENGINE DOWN AFTER LANDING. ****AIRCRAFT REMOVED FROM SERVICE**** IN WORK ***SUPPLEMENTAL INFORMATION ****AT CRUISE AT FL280, RECEIVED RT ENG OIL PSI WARNING MESSAGE. OIL PSI WAS FLUCTUATING IN THE GREEN BAND. C/W QRH. REDUCED POWER TO IDLE. DIVERTED TO ICT. AROUND 8,000FT, OIL PSI WENT INTO THE RED AND REMAINED THERE FOR THE REST OF THE FLIGHT. SHUT ENGINE DOWN AFTER LANDING. ****AIRCRAFT REMOVED FROM SERVICE**** R&R RH ENG IAW MTCM SUPP 12-11. ALL RII AND CKS REF TASK CARD 000-71-400-003AW.