What was found
FLT 185, JFK-SAN, DIVERTED TO PIT, LEVEL FLT 34,000FT, ENG 1 REVERSER FAULT. NAV TCAS FAULT. ANTI-ICE F/O PITOT PROBE FAULT ILLUMINATED IN SERIES. CONTACTED MX CONTROL. PER QRH REDUCED ENG TO IDLE. CONTINUED TO PIT. FOUND MLG EXTENSION MLG EXTENSION PROX SENSOR 20GA FAULTING. REMOVED AND REPLACED PROX SENSOR GA IAW A320 AMM 32-31-73-04 TESTED SYSTEM IAW A320 AMM 32-69-00-05. ALL TESTS GOOD. NO FAULTS INDICATED.