What was found
BZN - STARTED ENGINES AT GATE. DISCONNECTED FROM GPU. AS SOON AS PUSHBACK COMMENCED, NOSE GEAR DOORS CYCLED OPEN AND CLOSED. NO CONTACT OF DOORS WITH LECTRO CART. VERIFIED ALL BATTERY SWITCHES ON. CONFERRED WITH MTX CONTROL. ELECTED TO CONTINUE PUSH BACK. AS SOON AS PUSHBACK WAS RE-STARTED NOSE GEAR DOORS CYCLED OPEN THEN CLOSED. INTERROGATED PSEU FOUND PRESENT FAULT "NGDN1 RIGGING NEAR GAP TOO LARGE." VERIFIED INDUCTANCE VALUE TOO LOW. PERFORMED RIGGING OF S9 PROX SENSOR IAW AMM TASK 32-61-06-830-801. PERFORMED INDUCTANCE VALUE CHECK OF PROX SENSOR IAW AMM TASK 32-61-00-280-801. PRESSURIZED HYD SYSTEM AND CYCLED GEAR DOORS SEVERAL TIMES. OPS CHECK GOOD. NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE. NO PARTS REPLACED.