Narrative:

While cruising at FL310; we were alerted to a left hydraulic elec pump message. We noticed the hydraulic quantity on the status page was rapidly decreasing and the left electric pump press light on the overhead panel was flashing. The left autopilot was engaged; so the pilot flying engaged the right autopilot as I referenced the QRH. Within about 1 minute; we received the left hydraulic system press; rudder ratio and left hydraulic qty messages. Hydraulic quantity on the left side indicated .11. We completed the left hydraulic system press checklist and discussed our options as a crew and with [maintenance control]. Pressure on the left hydraulic system indicated 3;000 psi on the status page indicating that the ptu was operating normally and we could expect flaps; slats; landing gear and nosewheel steering to operate. ZZZ was VMC; dry runway and light winds- runway xx (11;500 ft.) was selected. We [advised ATC] and continued on the filed arrival and a 10 nm base in order to land below 198K. We selected flaps 1 on downwind to validate ptu operation and configured conservatively on the visual/ILS to runway xx. We executed a flaps 20 landing with light manual braking; right thrust reverser and exited on [taxiway] where we were inspected by crash fire rescue equipment (crash fire rescue). Crash fire rescue equipment did not note anything unusual and followed us to [gate] for shutdown. Upon engine shutdown at the gate; a large amount of hydraulic fluid drained from the landing gear doors onto the ramp. Crash fire rescue equipment assisted maintenance with cleanup and fire marshall discussed [event] with crew.

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Original NASA ASRS Text

Title: B757-200 flight crew reported a hydraulic system failure that resulted in a precautionary landing.

Narrative: While cruising at FL310; we were alerted to a L HYD ELEC PUMP message. We noticed the hydraulic quantity on the status page was rapidly decreasing and the L Electric Pump PRESS light on the overhead panel was flashing. The Left Autopilot was engaged; so the Pilot Flying engaged the Right Autopilot as I referenced the QRH. Within about 1 minute; we received the L HYD SYS PRESS; RUDDER RATIO and L HYD QTY messages. Hydraulic quantity on the left side indicated .11. We completed the L HYD SYS PRESS checklist and discussed our options as a crew and with [Maintenance Control]. Pressure on the left hydraulic system indicated 3;000 psi on the status page indicating that the PTU was operating normally and we could expect Flaps; Slats; Landing Gear and Nosewheel Steering to operate. ZZZ was VMC; dry runway and light winds- Runway XX (11;500 ft.) was selected. We [advised ATC] and continued on the filed arrival and a 10 nm base in order to land below 198K. We selected Flaps 1 on downwind to validate PTU operation and configured conservatively on the visual/ILS to Runway XX. We executed a Flaps 20 landing with light manual braking; right thrust reverser and exited on [taxiway] where we were inspected by CFR (Crash Fire Rescue). CFR did not note anything unusual and followed us to [Gate] for shutdown. Upon engine shutdown at the gate; a large amount of hydraulic fluid drained from the landing gear doors onto the ramp. CFR assisted maintenance with cleanup and Fire Marshall discussed [event] with crew.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.