What was found
ON FLIGHT, CREW REPORTED A LG AIR/GRD FAIL ANNUNCIATION AFTER TAKEOFF. LANDING GEAR HANDLE STUCK IN DOWN POSITION. OTHER ANNUNCIATIONS INCLUDED 1-2 WOW INOP AND SPS ADVANCED. AC RETURNED TO FIELD. AC REMOVED FROM SERVICE. REMOVED AND REPLACED NLG WOW SWITCH IAW AMM 32-63-01. OPS CHECK GOOD. REMOVED AND REPLACED LT MLG AFT WOW SWITCH IAW AMM 32-63-02. OPS CHECK GOOD. AC RETURNED FOR SERVICE. (K)