What was found
ENGINE 1 SYSTEM A LOW PRESSURE LIGHT ILLUMINATED ON CLIMB. AFTER APPROX 10 MINS A QTY BEGAN DROPPING AND WAS EVENTUALLY O. MAINTAINED NORMAL PRESSURE. GOT INTERMITTENT FLT CTL A LIGHT (LOW PRESS) AS WELL AS INT. ELEC 2 SYSTEM A LOW PRESSURE LIGHT AS STATED BY FRM COULD HAPPEN. LANDING GEAR EXTENDED NORMAL BUT SLOW; AFTER EXTENSION A QTY WAS 22. REPLACED 'A' SYSTEM HYD EMDP AND NR 1 EDP PER AMM 29-11-21 AND AMM 29-11-11. FLUSHED 'A' SYSTEM PER AMM 29-11-00. REPLACED NR 1 ENG CASE DRAIN FILTER MODULE; CHECK VALVE; HOSE (MODULE TO STRUT) AND CASE DRAIN STRUT AS REF AMM 29-11-51. ALSO REPLACED NR 1 ENGINE EDP SUPPLY HOSE REF AMM 70-10-02. FILTERS SHOWED NO EVIDENCE OF CONTAMINATION; ALL OPS AND LEAK CHECK GOOD. POS 1 PN OFF 849589 SN OFF MX774296 PN ON 849589 SN ON MX653349.