What was found
ON APPROACH, AFTER GEAR EXTENSION, NOSE GEAR DOOR CYCLED OPEN AND CLOSED 3 TIMES. LANDING WAS MADE WITH ALL GEAR DOORS CLOSED. FERRIED FOR REPAIRS. REPLACED NGDRCL PROX SENSOR S19 IAW 400MM TASK 32-61-06-000-802 AND 32-61-06-400-802 TR 32-359 AND REPLACED NLG DOOR MECHANISM TOGGLE LINK ASSY IAW TASK 32-31-61-900-801, PARA 1234A 7-12 4B 2-4 5 DUE TO PREVIOUS TROUBLESHOOTING ON LOG PAGE 514161 AND VERBAL TURNOVER FROM PREVIOUS SHIFT LANDING GEAR PRIMARY EXTENSION AND RETRACTION SYS OPS TEST GOOD 5 TIMES IAW DHC-8-400 TASK 32-31-00-710-801 ALL INDICATIONS NORMAL DURING TESTS. RETURNED TO SERVICE.