In response to legitimate ground proximity warning pilot deviates from TRACON assigned altitude.

Attributes
ACN	297668
Time
Date	199503
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bur
State Reference	CA
Altitude	msl bound lower : 5000 msl bound upper : 8000
Environment
Flight Conditions	IMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : bur tracon : sck
Operator	common carrier : air carrier
Make Model Name	A310
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach descent other
Route In Use	arrival other enroute : on vectors enroute airway : bur
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 250 flight time total : 16000 flight time type : 150
ASRS Report	297668
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

GPWS alert -- terrain -- at 5000 flight MSL level, 245 KTS clean, vectored via socal approach control. Over terrain from pmd via lynnx 7 arrival. From janny intersection via radar vector 220- 200 degree magneto heading, 245 KTS, 5000 ft MSL, over rising terrain. At approximately 360 degrees 20-15 DME, GPWS warning went off in A310 airbus cockpit, initiated immediate change in altitude and full power. Climb to 8000 ft MSL and informed controller of climb due to 8000 ft returned to 5000 ft and controled approach.

Original NASA ASRS Text

Title: IN RESPONSE TO LEGITIMATE GND PROX WARNING PLT DEVIATES FROM TRACON ASSIGNED ALT.

Narrative: GPWS ALERT -- TERRAIN -- AT 5000 FLT MSL LEVEL, 245 KTS CLEAN, VECTORED VIA SOCAL APCH CTL. OVER TERRAIN FROM PMD VIA LYNNX 7 ARR. FROM JANNY INTXN VIA RADAR VECTOR 220- 200 DEG MAGNETO HDG, 245 KTS, 5000 FT MSL, OVER RISING TERRAIN. AT APPROX 360 DEGS 20-15 DME, GPWS WARNING WENT OFF IN A310 AIRBUS COCKPIT, INITIATED IMMEDIATE CHANGE IN ALT AND FULL PWR. CLB TO 8000 FT MSL AND INFORMED CTLR OF CLB DUE TO 8000 FT RETURNED TO 5000 FT AND CTLED APCH.

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.