Narrative:

Prior to our descent and approach into san diego, we reviewed the warning about map shifts in the san area. With the captain flying the approach, localizer runway 27, in missed approach mode and me monitoring in ILS mode, we noticed that we were crossing the fixes on the approach, as idented by localizer DME, almost 2 mi prior to reaching the FMS waypoints. We were in visual conditions throughout the approach. We began our descent from the MDA at the computed normal descent point, centered on the localizer course with the PAPI showing 2 white and 2 red. At around 500 ft AGL, we got a terrain 'pull up' warning from the GPWS. We continued to landing. I had experienced this on my previous trip on a B757. This was on a B767. On previous flight, we were higher on glide path and never got the GPWS warning. I did not observe a map shift during the approach. The FMS waypoints were incorrectly computed and/or displayed throughout the approach. This is a critical safety system and san diego is a terrain sensitive airport. We need to fix this problem before it causes an accident.

Related reports:

Google
 

Original NASA ASRS Text

Title: B767 CREW GOT A 'TERRAIN, TERRAIN, PULL UP, PULL UP' GPWS WARNING AT 500 FT WHILE FLYING THE LOC RWY 27 APCH AT SAN.

Narrative: PRIOR TO OUR DSCNT AND APCH INTO SAN DIEGO, WE REVIEWED THE WARNING ABOUT MAP SHIFTS IN THE SAN AREA. WITH THE CAPT FLYING THE APCH, LOC RWY 27, IN MISSED APCH MODE AND ME MONITORING IN ILS MODE, WE NOTICED THAT WE WERE XING THE FIXES ON THE APCH, AS IDENTED BY LOC DME, ALMOST 2 MI PRIOR TO REACHING THE FMS WAYPOINTS. WE WERE IN VISUAL CONDITIONS THROUGHOUT THE APCH. WE BEGAN OUR DSCNT FROM THE MDA AT THE COMPUTED NORMAL DSCNT POINT, CTRED ON THE LOC COURSE WITH THE PAPI SHOWING 2 WHITE AND 2 RED. AT AROUND 500 FT AGL, WE GOT A TERRAIN 'PULL UP' WARNING FROM THE GPWS. WE CONTINUED TO LNDG. I HAD EXPERIENCED THIS ON MY PREVIOUS TRIP ON A B757. THIS WAS ON A B767. ON PREVIOUS FLT, WE WERE HIGHER ON GLIDE PATH AND NEVER GOT THE GPWS WARNING. I DID NOT OBSERVE A MAP SHIFT DURING THE APCH. THE FMS WAYPOINTS WERE INCORRECTLY COMPUTED AND/OR DISPLAYED THROUGHOUT THE APCH. THIS IS A CRITICAL SAFETY SYS AND SAN DIEGO IS A TERRAIN SENSITIVE ARPT. WE NEED TO FIX THIS PROB BEFORE IT CAUSES AN ACCIDENT.

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.