An MD80 flight crew received a GPWS 'terrain' warning on descent into bur.

Attributes
ACN	457100
Time
Date	199912
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bur.airport
State Reference	CA
Altitude	msl single value : 5000
Environment
Light	Night
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
ASRS Report	457100
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	457101
Events
Anomaly	conflict : airborne less severe
Independent Detector	aircraft equipment : gpws other flight crewa other flight crewb
Resolutory Action	flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

While being vectored for a visual approach to runway 8 at bur, we received a 'terrain, terrain' callout. We were descending to 5000 ft and immediately initiated a climb as per airline procedures for terrain avoidance to 6000 ft. Conditions were VMC and we had a visual with the subject terrain. We reported our climb to socal approach and the controller concurred with us that we were above the MVA for the area. No conflicts were encountered and we continued with vectoring for an uneventful landing on runway 8 at bur.

Original NASA ASRS Text

Title: AN MD80 FLC RECEIVED A GPWS 'TERRAIN' WARNING ON DSCNT INTO BUR.

Narrative: WHILE BEING VECTORED FOR A VISUAL APCH TO RWY 8 AT BUR, WE RECEIVED A 'TERRAIN, TERRAIN' CALLOUT. WE WERE DSNDING TO 5000 FT AND IMMEDIATELY INITIATED A CLB AS PER AIRLINE PROCS FOR TERRAIN AVOIDANCE TO 6000 FT. CONDITIONS WERE VMC AND WE HAD A VISUAL WITH THE SUBJECT TERRAIN. WE RPTED OUR CLB TO SOCAL APCH AND THE CTLR CONCURRED WITH US THAT WE WERE ABOVE THE MVA FOR THE AREA. NO CONFLICTS WERE ENCOUNTERED AND WE CONTINUED WITH VECTORING FOR AN UNEVENTFUL LNDG ON RWY 8 AT BUR.

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.