What was found
NR 1 ENGINE DRIVEN HYD PUMP LOW PRESSURE LIGHT ON "A" SYS QUANTITY AT 20 PERCENT. WITHIN 30 MINS, SYS "A" QTY DECREASED TO 0. LOSS OF SYS A NON-NORMAL CHECKLIST CARRIED OUT. NLG RETRACT ACTUATOR HYD TUBE FOUND CRACKED AND LEAKING. NLG RETRACT ACTUATOR UP LINE REPLACED IAW AMM 32-33-11. NR 1 ENG EDP REPLACED IAW AMM 29-11-11 AND "A" SYS FLUSHED IAW AMM 29-11-00. NO METAL CONTAMINATION FOUND IN ANY FILTERS."A" SYS ACOUSTIC FILTER REPLACED IAW AMM 29-11-11 UP LINE, PN 273A1123-1, PN 2356135.