What was found
NOSE WHEEL AND MAIN LANDING GEAR INDICATORS INDICATED UNSAFE UNTIL INDICATOR LIGHTS WERE PRESS. THIS CAUSED A GO-AROUND. REPLACED PROX BOX, JACKED A/C, RAN SEVERAL TIMES AND NO FAULTS. CHECKED PROX SWITCHES, ALL GEAR AND NO FAULTS. A/C CKS GOOD FOR SERVICE PER MM CHAP 31, 32.