MEM CTLR DESCRIBED GAR INCIDENT UTILIZING CRDA PROCS ALLEGING LACK OF TRAINING AS CONTRIBUTORY.

Narrative

I WAS WORKING LC2 AND LC3 FOR RWYS 18C/L AND RWY 27 DURING THE LAST HALF OF AN INBOUND PUSH. THE WIND WAS 150 DEGS AT 10 KTS FOR ALL OF MY SHIFT. WE WERE LNDG RWYS 18L/R AND RWY 27 USING CONVERGING RWY DISPLAY AID (CRDA). ACFT X WAS ON FINAL APCH TO RWY 18L AND ACR Y WAS ON APCH TO RWY 27. THE RWY 27 FINAL CTLR WAS USING A CRDA TARGET TO SPACE ACR Y WITH ACFT X. INSIDE THE MARKER; ACFT X SLOWED TO 120 KIAS. ACR Y INDICATED SPD WAS 160 KTS. I ASKED ACR Y TO REDUCE TO FINAL APCH SPD; BUT ACR Y WAS ALREADY AT FINAL APCH SPD. I ASKED ACR Y TO MAKE A L OR R S-TURN FOR SPACING; BUT ACR Y REPLIED UNABLE. I IMMEDIATELY SENT ACFT X AROUND. CONSIDERING THAT THE AGENCY PROVIDED EACH CTLR AT MEM ATCT WITH ONLY 3 PRACTICE PROBS OF TRAINING (2 PROBS DEVOID OF WIND AND THE THIRD FACTORING IN WIND UNREALISTICALLY) FOR CRDA PROCS ON THE RWY 27 FINAL POS AND ONLY A 1 1/2 HR BRIEFING FOR THE TWR PROCS; IT IS NOT SURPRISING THAT THE NUMBER OF GAR'S FOR ACFT INVOLVED IN A SIMULTANEOUS RWY 18L/C AND RWY 27 OP HAVE GONE UP. IT ALSO DOESN'T MAKE SENSE THAT THE AGENCY INSISTS ON USING RWY 27 IN AN S CONFIGN WHEN THE WIND IS NOT ALIGNED FOR IT. THE AGENCY CREATES A VERY DANGEROUS OP CONSIDERING WHAT LITTLE CAPACITY IS GAINED.