DHC8 flight crew execute escape maneuver after receiving GPWS alert when in descent to oxr.

Attributes
ACN	509912
Time
Date	200105
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : oxr.airport
State Reference	CA
Altitude	msl bound lower : 5400 msl bound upper : 6000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 3400 flight time type : 1300
ASRS Report	509912
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	other spatial deviation
Independent Detector	aircraft equipment : gpws other flight crewa
Resolutory Action	aircraft : automation overrode flight crew flight crew : returned to original clearance flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Flight Crew Human Performance Environmental Factor Airspace Structure Aircraft
Primary Problem	Aircraft

Narrative:

On a radar vector heading of 210 degrees to intercept the runway 25 localizer course at oxr for the approach to oxr, we were assigned a descent from 6000 ft to 5000 ft. In the descent at approximately 5400 ft, the GPWS advised 'terrain, pull up.' a climb was initiated immediately back to 6000 ft. Visual reference was maintained with the terrain, after crossing the ridge, continued descent. The aircraft speed was 200 KIAS with 1000 FPM. Radar altimeter showed no less than 2000 ft, MVA in the area is 5000 ft.

Original NASA ASRS Text

Title: DHC8 FLC EXECUTE ESCAPE MANEUVER AFTER RECEIVING GPWS ALERT WHEN IN DSCNT TO OXR.

Narrative: ON A RADAR VECTOR HDG OF 210 DEGS TO INTERCEPT THE RWY 25 LOC COURSE AT OXR FOR THE APCH TO OXR, WE WERE ASSIGNED A DSCNT FROM 6000 FT TO 5000 FT. IN THE DSCNT AT APPROX 5400 FT, THE GPWS ADVISED 'TERRAIN, PULL UP.' A CLB WAS INITIATED IMMEDIATELY BACK TO 6000 FT. VISUAL REF WAS MAINTAINED WITH THE TERRAIN, AFTER XING THE RIDGE, CONTINUED DSCNT. THE ACFT SPD WAS 200 KIAS WITH 1000 FPM. RADAR ALTIMETER SHOWED NO LESS THAN 2000 FT, MVA IN THE AREA IS 5000 FT.

Data retrieved from NASA's ASRS site as of July 2007 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.