What was found
ON T/O LDG RETRACTED. ECAM DISPLAYED LDG RETRACTION FAULT. SELECTED POS DET 1 AND 2. GEAR RET FAULT REMAINED ON ECAM. FLAPS WON'T RETRACT, FROM 15/20 ONCE GEAR DOWN ALL FLAP OPS NORMAL. LOST ALL AUTOMATION ON GEAR RET RETURNED TO NORMAL WITH GEAR EXTENSION. FOUND FAULT ON SFCC 1/2, EFCU 1/2, FLC 1/2, ADC 1/2. ALL RESET AND BITE CHECK OK. HARD FAULTS ON PROX BOX. JACKED ACFT AND FOUND NLG TARGETS MISALIGNED IAW MM 32-00-00-04. UPON FURTHER INSPECTION FOUND NLG NITROGEN COMPLETLY DEPLETED. DOWN JACKED ACFT AND SERVICED NLG STRUT IAW AMM 12-12-32-0. GEAR OPERATIONAL TEST GOOD IAW AMM 32-31-00-5.