<< >> NASA ASRS Report 1302359, October 2015

B737 flight crew notices depleting system B hydraulic quantity followed quickly by the system B engine driven pump hydraulic low pressure light during climb out. The engine driven pump is turned off and the flight returns to the departure airport for a normal landing.

Attributes
ACN	1302359
Time
Date	201510
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Hydraulic System Lines Connectors Fittings
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

On climb out through 11;000 feet; the # 2 engine driven hydraulic pump low pressure light illuminated and the B hydraulic system quantity quickly decreased to 45%; then continued to decrease very slowly. We requested clearance back to the departure airport. Per QRH for the low press light; we turned off the #2 engine hydraulic pump. No other lights or indications. Since we still had normal pressure and quantity was pretty stable; and we were by that time on final approach; we configured the aircraft for a flaps 30 landing. Normal landing; rollout; and taxi in followed.

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Original NASA ASRS Text

Title: B737 flight crew notices depleting system B hydraulic quantity followed quickly by the system B engine driven pump hydraulic low pressure light during climb out. The engine driven pump is turned off and the flight returns to the departure airport for a normal landing.

Narrative: On climb out through 11;000 feet; the # 2 engine driven hydraulic pump low pressure light illuminated and the B hydraulic system quantity quickly decreased to 45%; then continued to decrease very slowly. We requested clearance back to the departure airport. Per QRH for the low press light; we turned off the #2 engine hydraulic pump. No other lights or indications. Since we still had normal pressure and quantity was pretty stable; and we were by that time on final approach; we configured the aircraft for a flaps 30 landing. Normal landing; rollout; and taxi in followed.

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.