GLS (Ground Based Augmentation (GBAS) Landing System) amber light overhead
Synopsis
GLS (Ground Based Augmentation (GBAS) Landing System) amber light overhead
Narrative
I WAS VECTORING AN LGT FOR A STRAIGHT-IN VISUAL APCH TO RWY 9L. I HAD A WDB ON DOWNWIND ABEAM THE ARPT. I HAD THE STRAIGHT-IN LGT ON A 070 DEG HDG SO I COULD PUT THE WDB IN AHEAD OF THE LGT (9L ALSO). I TURNED THE WDB L TO 180 DEG AND DSNDED THE ACFT TO 1500 FT (WAS OUT OF ABOUT 5500 FT AT THIS TIME). I TURNED THE LGT L TO 040 DEG MAINTAIN 3000 FT AND EXPLAINED I WAS 'S' TURNING TO FOLLOW COMPANY HVY JET. I THEN TURNED THE WDB L TO 100 DEG. (ACFT NOW OUT OF ABOUT 4200 FT). REALIZING SEPARATION WAS DETERIORATING I TURNED THE LGT L TO 360 DEG AND MAINTAIN 4000. ALTHOUGH THE WDB ACKNOWLEDGED THE L TURN TO 100 DEG. THE ACFT NEVER TURNED. THE LGT SAID HE WAS RECEIVING A TCASII 'RA' AND WAS CLBING. I ENDED UP CHANGING THE WDB TO RWY 9R (ACFT WAS STILL HDG S). ELIMINATING THE CONFLICT. ALTHOUGH I DON'T KNOW THIS TO BE A FACT; I SUSPECT THAT WHEN THE WDB WAS HDG 180 DEG AND I TURNED IT TO 100 DEG; IT WAS EITHER STUDYING THE STRAIGHT-IN LGT ON TCASII OR WAS POSSIBLY RECEIVING AN 'RA' BECAUSE THE ACFT NEVER MADE THE L TURN TO 100 DEG. HAD THE WDB TURNED WHEN TOLD; I STILL WOULD HAVE HAD TO 'S' TURN THE LGT BUT THERE WOULD HAVE BEEN NO POSSIBLE LOSS OF SEPARATION. ALSO; WHEN THE WDB WAS HDG 180 DEG DSNDING TO 1500 FT; IT LEVELED AT 4000 FT FOR 3 MI FURTHER ADDING TO ME SUSPICION THAT A TCASII ADVISORY MADE SOME POOR VECTORING ON MY PART FAR WORSE THAN IT WOULD HAVE BEEN. PLTS SHOULD QUESTION TCASII TFC IF THEY'RE CONCERNED RATHER THAN 'DOING THEIR OWN THING.'; During taxi out we experienced a sudden and complete loss of GPS signal. No prior notice was received from ATC
Second reporter narrative
or any Receiver Autonomous Integrity Monitoring (RAIM) prediction tools regarding potential satellite interference or degradation. The failure appeared to be systematic and immediate
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.