FLC RESPONDS TO TCASII RA IN ALTDEV ALT EXCURSION.

Narrative

A MISSED APCH DURING DAY VFR CONDITIONS WAS EXECUTED BECAUSE THE RWY WAS NOT CLR. MISSED APCH CLRNC WAS TO CLB TO 3000 FT MSL WITH RWY HDG (DFW ARPT -- 18R) FROM TWR. WE SWITCHED TO APCH CTL AND WAS GIVEN A HDG OF 260 DEGS AND A CLB TO 5000 FT MSL. ONCE LEVEL 5000 FT HDG 260; WE RECEIVED A TFC WARNING FROM TCASII; FOLLOWED BY A RA TO CLB; FOLLOWED BY INCREASE CLB. THE CLB WAS IMMEDIATELY INITIATED WITH MAX PWR. THE CLB WAS STOPPED AT 6700 FT MSL WITH A CLR OF TFC FROM TCASII. ALT ADVISORY ON TCASII SHOWED AT ONE POINT THAT THE ACFT WAS WITHIN 100 FT AND SLIGHTLY BEHIND US AT ABOUT 4-5 O'CLOCK POS. I FEEL THAT THE FIRST MISTAKE BY THE TWR OF XING ACFT AHEAD OF LNDG ACFT SHOULD BE REVIEWED BY THE TWR OPERATORS; AND PROCS FOR HANDLING GAR TFC AT DFW ARPT IS EXTREMELY DANGEROUS AND LACKING IN PROCS. SUPPLEMENTAL INFO FROM ACN 214152: THIS TA WAS OUR 4-5 O'CLOCK POS AT 600 FT LOWER CLBING. JUST PRIOR TO TA; I HEARD AN ACFT (FEMALE VOICE) SAY THAT TFC WAS NO LONGER IN SIGHT DUE TO CLOUDS (I BELIEVE WE WERE THEIR TFC). AFTER APPROX 5 SECONDS; AN 'INCREASE CLB' CALL CAME FROM TCASII AND CAPT INCREASED NOSE ATTITUDE AND THRUST TO APPROX FIREWALL. AFTER A 'CLR OF CONFLICT' CAME FROM TCASII; WE LEVELED AT 6700 FT MSL AND MADE 3 CALLS TO ATC OF THIS FACT -- THE LAST CALL WAS FINALLY ACKNOWLEDGED (FREQ WAS VERY BUSY). WE WERE TOLD BY ATC TO MAINTAIN 6000 FT. COMMENTS: I FEEL THE DFW COMPLEX IS SO CROWDED THAT IN A CASE LIKE THIS (VFR; BUT LAYERS DEVELOPING) THE ATC FOLKS CAN EASILY GET OVERLOADED SHOULD AN ACFT HAVE TO GAR. WE HAD TO REQUEST AN ALT/HDG ON GAR -- THIS INFO WAS NOT GIVEN IMMEDIATELY TO US. IS ATC EQUIPPED (SPRING-LOADED) TO HANDLE 1 MORE ACFT IN AN ALREADY SATURATED ENVIRONMENT? ALTHOUGH RARE; PROCS USED TO BE ESTABLISHED FOR VFR GAR PROCS AT BUSY ARPTS TO PREVENT SOMETHING LIKE WHAT HAPPENED TODAY.