B737-900
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Human-Machine Interface; Workload; Troubleshooting
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Air Traffic Control Issued New Clearance; Flight Crew Returned To Departure Airport; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification; General Maintenance Action; General Flight Cancelled / Delayed
Aircraft
Climbing thru 25;000 ft.; engine 2 hydraulic low pressure illuminated. Did QRH [procedure] after checked hydraulic quantity and pressure. Quantity was 8% and pressure was normal 2980. A few minutes passed and then pressure dropped to 0 and elec 1 low pressure light illuminated and FLT (Flight) Control low pressure illuminated. Started the Loss of System B QRH and [requested priority handling] with Center for a return. Talked with dispatch and got rerouted. The QRH went smoothly with plenty of time for alt flap extension and flap 15 landing. Smooth overweight landing. We had smoke coming from the number 2 engine. We shut it down and taxied to our gate and parked. Maintenance inspected the engine and passengers deplaned. After clearing the runway I would of shut down the #2 engine and shut off the right pack to make sure no hydraulic smoke entered the cabin.
B737 Captain reported engine 2 low hydraulic pressure during climb.