FLC OF MD88 ON DSCNT HAS TCASII TA THEN RA AND CLBS TO AVOID TFC 100 FT BELOW THEM.

Narrative

I WAS THE PF DSNDING FROM 10000 FT MSL TO 8000 FT ON A R DOWNWIND TO RWY 8 AT ABQ. WE WERE ON RADAR VECTORS HDG 260 DEGS AND NOTICED A TCASII DISPLAY OF AN ACFT AT 11 O'CLOCK AND ABOUT 5 MI AT 100 FT BELOW US. IT WAS CLR SKIES WITH 10 MI VISIBILITY BUT I COULD NOT SEE THE OTHER ACFT; POSSIBLY BECAUSE THE GND WAS WHITE WITH SNOW. THE TCASII DISPLAY TURNED 'YELLOW-DOT' AND ANNOUNCED 'TFC; TFC' AND IT LOOKED LIKE WE WERE ON A COLLISION COURSE. I STILL COULD NOT SEE THE OTHER ACFT VISUALLY. THE TCASII SYS THEN ANNOUNCED 'CLB' AND THE VSI SHOWED A GREEN ARC AT ABOVE 1000 FPM; SO I ADVANCED THE THROTTLES TO GAR AND BROUGHT THE NOSE UP ABOUT 15 DEGS; WHILE DISCONNECTING THE AUTOPLT. I NOTICED THE R ENG WAS SLIGHTLY OVERBOOSTING AND RETARDED IT; BUT THE CAPT PROMPTED ME TO KEEP THE THROTTLES UP; AND FOLLOW THE TCASII COMMANDS. THE TCASII THEN ANNOUNCED THAT THE CONFLICT HAD BEEN RESOLVED; AND I LOWERED THE NOSE AND RETARDED THE THROTTLES AND RETURNED BACK TO 8000 FT. DURING THIS MANEUVER APCH CTL ALSO ADVISED US OF TFC CLBING THROUGH 8000 FT AT OUR 11 O'CLOCK POS; AND AFTER THE CONFLICT ENDED; APCH SAID THAT THE 'COMMANDER' HAD US IN SIGHT AND WE HAD PASSED DIRECTLY OVERHEAD. WE NEVER SAW THE TFC; BUT THE TCASII SYS SHOWED HIM PASSING UNDER US AT 100 FT BELOW OUR ALT. DURING THE MANEUVER OUR CONFIGN WAS FLAPS 15 DEGS AND OUR SPD WAS 170 KTS ASSIGNED. WE THEN PROCEEDED TO AN UNEVENTFUL VISUAL LNDG RWY 8 AT ABQ.