Dash 8 captain reported loss of number 2 hydraulic system on approach. Flight crew ran the procedure...

Narrative:

During approach; approximately 20 NM or 10 minutes out; I noticed that the number 2 hyd. Quantity was at zero; with no associated caution lights. We ran the low hydraulic quantity checklist; which told us to monitor the quantity and pressure in the number 2 system. On final approach we put the landing gear down; and the gear doors opened; the 3 red unsafe lights were on; and the gear handle was lit. It took much longer than normal for the landing gear to come down. Once down; we had three green and no red lights. We performed a missed approach and did not retract the landing gear. During the missed approach; the number 2 hydraulic pump caution illuminated. Once level at 2;000 ft.; I called for the number 2 hydraulic pump checklist; which led us to the emergency landing gear extension checklist. During this time we climbed to 5;000 ft.; declared an emergency; coordinated with dispatch; our flight attendant; and operations. On final approach the outboard roll spoiler caution light illuminated and during rollout the nose wheel steering caution light also illuminated. After completing all the checklists we landed without incident. Once clear of the active runways we taxied [off the runway]; where maintenance and a tug met us. Maintenance pinned the landing gear down and we were tugged into gate without incident.

Original NASA ASRS Text

Title: Dash 8 Captain reported loss of Number 2 hydraulic system on approach. Flight crew ran the procedure; contacted appropriate departments; and landed safely.

Narrative: During approach; approximately 20 NM or 10 minutes out; I noticed that the Number 2 hyd. quantity was at zero; with no associated caution lights. We ran the low hydraulic quantity checklist; which told us to monitor the quantity and pressure in the Number 2 system. On final approach we put the landing gear down; and the gear doors opened; the 3 red unsafe lights were on; and the gear handle was lit. It took much longer than normal for the landing gear to come down. Once down; we had three green and no red lights. We performed a missed approach and did not retract the landing gear. During the missed approach; the Number 2 hydraulic pump caution illuminated. Once level at 2;000 FT.; I called for the Number 2 hydraulic pump checklist; which led us to the emergency landing gear extension checklist. During this time we climbed to 5;000 FT.; declared an emergency; coordinated with Dispatch; our Flight Attendant; and Operations. On final approach the outboard roll spoiler caution light illuminated and during rollout the nose wheel steering caution light also illuminated. After completing all the checklists we landed without incident. Once clear of the active runways we taxied [off the runway]; where Maintenance and a tug met us. Maintenance pinned the landing gear down and we were tugged into gate without incident.

Data retrieved from NASA's ASRS site as of July 2013 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	1111532
Time
Date	201308
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Dash 8-300
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Hydraulic Main System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Dash 8 captain reported loss of number 2 hydraulic system on approach. Flight crew ran the procedure; contacted appropriate departments; and landed safely.