Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem
Aircraft
Descending out of 18;000 feet we lost the quantity and pressure on the green hydraulic system. We accomplished the appropriate checklists and set up for the approach. During the approach; the flaps would not extend with the use of the other two hydraulic systems. After we manually lowered the gear; the hydraulic fluid in the green system indicated a return to the normal level. At that point; we conferred with maintenance control and elected to use the green system electric pumps to lower the flaps which was not called for in the checklist. The flaps extended to the full position and we continued the approach and landing without incident.
Descending out of FL180 we lost the quantity and pressure on the green hydraulic system. We ran the checklist and then set up for the approach. When we went to put the flaps out they did not extend so we discontinued the approach and we noticed that after we manually extended the landing gear the green system hydraulics now showed normal pressure and quantity. We then conferred with maintenance control and elected to use the green system electric pumps to lower the flaps which was not called for in the checklist; but because the yellow system was not working to extend the flaps and we now had full green pressure and quantity with the engine pumps now off we felt it was a safer option to use the electric pumps and land with full flaps.
A300 flight crew reported loss of green hydraulic system quantity and pressure on descent; but the system reportedly returned to normal later in the approach.