What was found
6060 - AFTER TO GEAR UP NLG WOULD NOT RETRACT RAN QRH GEAR DOWN IN GREEN . NO ASSOC MSG, NO MAN RELEASE. HYDS ON. ATC DECLARED EMER, NO HARD. AIRCRAFT REMOVED FROM SERVICE. INSPECTED AND FOUND NLG TOW GUARD COLLAR MIGRATED UP AND DAMAGED NLG PROX SENSOR AND BRACKET. INSTALLED GEAR PINS AND REMOVED FLAGS IAW AWA SUP 11-054A. R+R NLG WOW PROX SNESOR BRACKET. REF AMM 32-61-25 NO DAMAGE NOTED TO PROX SENSOR OR HARNESS. PEROFMRED GEAR SWING TO VERIFY OPERATION. ALL FUNCTIONS CORRECT.