As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT #3356 RH ENG OIL PRESS FLUX IN FLIGHT AT ALL POWER SETTINGS BETWEEN 70 PSI AND 120 PSI. AIR RETURN TO DTW. MAINTENANCE INSPECTED CANNON PLUG AT GAUGE AND PRESS XDUCER, CHECKS GOOD. MAINTENANCE CLEANED PRESSURE REF. TUBE. REMOVED AND REPLACED RH ENG OIL PRESS. TRANSDUCER.GROUND RAN A/C FOR 30 MIN. NO FLUX NOTED. LEAK CHK GOOD.