Narrative:

Vectored on downwind visual runway 27 (backed up with RNAV approach). At a point between vydda (4;000 feet) and okain (3;600 feet); 2 miles; cleared visual approach to runway 27. Configuration was flaps 3/170 knots. A slight delay was made before turn to join final and continuation of descent. Descent at 500 FPM initiated to 3;600 feet while in managed descent mode. With runway in sight; level at 3;600 feet; and as aircraft turned to join final; terrain warning. Aircraft was level at 3;600 feet on autopilot; and within 5 degrees of final when warning activated. As PF (pilot flying); procedure for night terrain warning initiated but as soon as power increased and nose vector raised even slightly; warning subsided. After debrief with pm (pilot monitoring); I realize that I did not actually achieve toga (take-off/go-around) thrust before warning subsided and therefore did not complete the maneuver. I agree with this assessment but the warning subsided almost immediately after initial corrective action and the aircraft was now on or very close to final and all environmental concerns were visible. By this time the aircraft was either very close to or on runway centerline. Terrain was in sight. Approach continued without further incident. As PF; I was aware of terrain and took measures; including backing up approach with RNAV procedure; as well as exercising caution with descents to remain at or above prescribed altitudes at each fix. Needless to say; warning was not expected; particularly after having taken precautions mentioned.

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Original NASA ASRS Text

Title: A319 flight crew reported receiving a GPWS terrain warning on a night visual approach to SAN.

Narrative: Vectored on downwind Visual Runway 27 (backed up with RNAV Approach). At a point between VYDDA (4;000 feet) and OKAIN (3;600 feet); 2 miles; cleared Visual Approach to Runway 27. Configuration was Flaps 3/170 knots. A slight delay was made before turn to join final and continuation of descent. Descent at 500 FPM INITIATED to 3;600 feet while in Managed Descent mode. With runway in sight; level at 3;600 feet; and as aircraft turned to join final; Terrain Warning. Aircraft was level at 3;600 feet on Autopilot; and within 5 degrees of final when warning activated. As PF (pilot flying); procedure for night terrain warning initiated but as soon as power increased and nose vector raised even slightly; warning subsided. After debrief with PM (pilot monitoring); I realize that I did not actually achieve TOGA (Take-off/Go-Around) thrust before warning subsided and therefore did not complete the maneuver. I agree with this assessment but the warning subsided almost immediately after initial corrective action and the aircraft was now on or very close to final and all environmental concerns were visible. By this time the aircraft was either very close to or on runway centerline. Terrain was in sight. Approach continued without further incident. As PF; I was aware of terrain and took measures; including backing up approach with RNAV procedure; as well as exercising caution with descents to remain at or above prescribed altitudes at each fix. Needless to say; warning was not expected; particularly after having taken precautions mentioned.

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.