Narrative:

I was training on the west control at san juan international. I was sequencing about 6 aircraft to final for an east operation. There was a lot of coasting of radar data blocks. I vectored air carrier X to join localizer runway 10. He appeared to go through localizer so I gave him a vector back to the localizer. After about 30 seconds the radar started jumping around. I observed air carrier X still tracking sebound at least 5 mi south of localizer. I then vectored air carrier X further northeast to join localizer air carrier X questioned the vector and said he thought he was supposed to join. At that time the radar quit. My instructor then took over. When the radar stated up again, the radar track on air carrier Y came back up north of the localizer heading northeast. My instructor gave traffic instructions to both aircraft but what I gathered is both aircraft were receiving TCASII alerts and could not or would not acknowledge their instructions. I have been in san juan for less than 6 weeks. The radio's are bad, the controller land lines are virtually unusable and the radar presentation is for en route radar at best and has no place being used for a radar approach control especially at a major hub. The only thing that saves this place is good WX.

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Original NASA ASRS Text

Title: ATC EQUIP PROB RADAR FAILED AND ACR X HAD LTSS FROM ACR Y. SYS ERROR.

Narrative: I WAS TRAINING ON THE W CTL AT SAN JUAN INTL. I WAS SEQUENCING ABOUT 6 ACFT TO FINAL FOR AN E OP. THERE WAS A LOT OF COASTING OF RADAR DATA BLOCKS. I VECTORED ACR X TO JOIN LOC RWY 10. HE APPEARED TO GO THROUGH LOC SO I GAVE HIM A VECTOR BACK TO THE LOC. AFTER ABOUT 30 SECONDS THE RADAR STARTED JUMPING AROUND. I OBSERVED ACR X STILL TRACKING SEBOUND AT LEAST 5 MI S OF LOC. I THEN VECTORED ACR X FURTHER NE TO JOIN LOC ACR X QUESTIONED THE VECTOR AND SAID HE THOUGHT HE WAS SUPPOSED TO JOIN. AT THAT TIME THE RADAR QUIT. MY INSTRUCTOR THEN TOOK OVER. WHEN THE RADAR STATED UP AGAIN, THE RADAR TRACK ON ACR Y CAME BACK UP N OF THE LOC HDG NE. MY INSTRUCTOR GAVE TFC INSTRUCTIONS TO BOTH ACFT BUT WHAT I GATHERED IS BOTH ACFT WERE RECEIVING TCASII ALERTS AND COULD NOT OR WOULD NOT ACKNOWLEDGE THEIR INSTRUCTIONS. I HAVE BEEN IN SAN JUAN FOR LESS THAN 6 WKS. THE RADIO'S ARE BAD, THE CTLR LAND LINES ARE VIRTUALLY UNUSABLE AND THE RADAR PRESENTATION IS FOR ENRTE RADAR AT BEST AND HAS NO PLACE BEING USED FOR A RADAR APCH CTL ESPECIALLY AT A MAJOR HUB. THE ONLY THING THAT SAVES THIS PLACE IS GOOD WX.

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.