A dhc-8 flight crew reported they had to use the parking brake to stop the aircraft at the gate when...

Narrative:

Taxied single engine onto gate at ZZZ. Applied normal brakes and realized no normal brakes. Applied parking brake to stop which resulted in an abrupt stop. I got on PA and apologized to passengers for the abrupt stop. Passengers deplaned normally. I also explained to marshaller why we were late in applying brakes and stopping. I applied the parking brake which resulted in an abrupt stop.we were taxiing to gate single engine with the flaps up. Hydraulic standby pumps were not selected on which resulted in the number 1 hydraulic system not powered and therefore the normal brakes not working. I usually double check that the standby pumps are on and functioning whenever taxiing on one engine but failed to see it this time. I do not know why pumps were not selected on. We should have selected them on with the final descent-approach checklist. At any rate we missed the standby hydraulic pumps not selected on.I made a PA announcement to passengers apologizing for the quick stop. Also checked with flight attendants (fas) to make sure we had no injuries. Fas stated no injuries; but that we had startled the passengers with the abrupt stop.be extra careful when single engine taxiing with the flaps up; that the hydraulic standby pumps are selected on and functioning.

Original NASA ASRS Text

Title: A DHC-8 flight crew reported they had to use the parking brake to stop the aircraft at the gate when they failed to turn the standby hydraulic pumps on; causing loss of normal brake pressure.

Narrative: Taxied single engine onto gate at ZZZ. Applied normal brakes and realized no normal brakes. Applied parking brake to stop which resulted in an abrupt stop. I got on PA and apologized to passengers for the abrupt stop. Passengers deplaned normally. I also explained to marshaller why we were late in applying brakes and stopping. I applied the parking brake which resulted in an abrupt stop.We were taxiing to gate single engine with the flaps up. HYD standby pumps were not selected on which resulted in the number 1 HYD system not powered and therefore the normal brakes not working. I usually double check that the standby pumps are on and functioning whenever taxiing on one engine but failed to see it this time. I do not know why pumps were not selected on. We should have selected them on with the final descent-approach checklist. At any rate we missed the standby HYD pumps not selected on.I made a PA announcement to passengers apologizing for the quick stop. Also checked with Flight Attendants (FAs) to make sure we had no injuries. FAs stated no injuries; but that we had startled the passengers with the abrupt stop.Be extra careful when single engine taxiing with the flaps up; that the HYD standby pumps are selected on and functioning.

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.

Attributes
ACN	1294443
Time
Date	201509
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Dash 8-100
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Normal Brake System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy

A dhc-8 flight crew reported they had to use the parking brake to stop the aircraft at the gate when they failed to turn the standby hydraulic pumps on; causing loss of normal brake pressure.