As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 2768, RT OIL PRESSURE LIGHT ILLUMINATED ON CWP. ENGINE PRESSURE AT 75 PSI PROP OIL AT 80 PSI, BOTH CONSISTENTLY AT THOSE PRESSURES. AIR RETURN TO MSP. MAINTENANCE REPLACED RT ENGINE CWP PSI SWITCH P/N 8346-5 IAW SAAB AMM 79-30-5-4. OPS CHECKS AND LEAK CHECKS GOOD.