Flight Crew Commercial; Flight Crew Instrument; Flight Crew Private; Flight Crew Multiengine
Workload; Troubleshooting
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification
Aircraft
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.
[Report narrative contained no additional information.]
B757-200 flight crew reported a hydraulic system failure that resulted in a precautionary landing.