What was found
DURING TAKEOFF AND CLIMB-OUT FROM MIA, NR 3 ENGINE OIL PRESSURE INCREASED TO 85 PSI. REDUCED THROTTLE TO IDLE AND PRESSURE DECREASED THEN INCREASED TO 90 PSI. SHUTDOWN NR 3 ENGINE THEN FOLLOWED AOM ABNORMAL PROCEDURES AND DECLARED EMERGENCY. RETURNED TO MIA AND LANDED AIRCRAFT WITHOUT INCIDENT. REMOVED AND REPLACED NR 3 ENGINE OIL PRESS XMITTER. NO HELP. REINSTALLED OLD XMITTER IAW MM 79-32-0. INSPECTED OIL STRAINER, FOUND CLEAN. ADJUSTED PRESS RELIEF IAW 72-00. TESTED ENGINE IAW 71-00-0. AIRCRAFT RETURNED TO SERVICE. (M)