A319 first officer reported receiving a GPWS terrain warning on the lyndi arrival into san.

Narrative:

Descending on the lyndi arrival into san and approximately near lucki; the approach controller told us to fly a south heading and to descend and maintain 5000 ft and expect vectors RNAV 27 approach. After turning south and leaving 6000 ft we received a GPWS terrain pull up warning. I immediately went toga (take off/go around) thrust; disconnected the autopilot; went full climb. The warning went away passing back through 6;000 ft; and at approximately 6700 ft I leveled off and reconfigured the aircraft back into auto flight. The captain told the controller that we had a GPWS warning and executed a climb. The controllers response was '5000 is a good altitude'. He gave us a right turn direct to vydda and said to descend and maintain 5000 ft. The approach and landing was routine. Our terrain displays never showed any terrain.

Original NASA ASRS Text

Title: A319 First Officer reported receiving a GPWS terrain warning on the LYNDI arrival into SAN.

Narrative: Descending on the LYNDI Arrival into SAN and approximately near LUCKI; the approach controller told us to fly a south heading and to descend and maintain 5000 ft and expect vectors RNAV 27 approach. After turning South and leaving 6000 ft we received a GPWS TERRAIN PULL UP warning. I immediately went TOGA (Take off/Go Around) THRUST; disconnected the autopilot; went full climb. The warning went away passing back through 6;000 ft; and at approximately 6700 ft I leveled off and reconfigured the aircraft back into auto flight. The Captain told the controller that we had a GPWS warning and executed a climb. The controllers response was '5000 is a good altitude'. He gave us a right turn direct to VYDDA and said to descend and maintain 5000 ft. The approach and landing was routine. Our terrain displays never showed any terrain.

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	1339326
Time
Date	201603
Local Time Of Day	1201-1800
Place
Locale Reference	SCT.TRACON
State Reference	CA
Environment
Flight Conditions	IMC
Light	Dusk
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR LYNDI FOUR
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 836
Events
Anomaly	Inflight Event / Encounter CFTT / CFIT