B737 captain reported engine 2 low hydraulic pressure during climb.

Attributes
ACN	1756006
Time
Date	202008
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dusk
Aircraft 1
Make Model Name	B737-900
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Hydraulic System
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Events
Anomaly	Aircraft Equipment Problem Less Severe Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

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 flight (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.

Original NASA ASRS Text

Title: B737 Captain reported engine 2 low hydraulic pressure during climb.

Narrative: 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.

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.