ACR X TCASII RA HAD NMAC LTSS WITH ACR Y ALTDEV.

Narrative

ACR X PGUM-RKSS; JUL/XX/95; B-727-200; 2 PLTS; 1 FE; 4 FLT ATTENDANTS; 74 PAX. ALL CREW AND PAX SEATED; SEAT BELT SIGN ON; ALL IN-RANGE CHKLISTS COMPLETED; ACFT IN LEVEL STABILIZED FLT AT ASSIGNED ALT OF 8000 FT; HDG 290 DEGS ASSIGNED; AIRSPD 210 KTS ASSIGNED UNDER SEOUL APCH FREQ 119.1 (MONITORING 121.5 #2 RADIO) WITH SEOUL ATC; OVER ANGANG (SEL FREQ 115.1) VOR; TCASII RA (SOLID RED) 'CLB'; WITHIN 0.3 SECONDS. PF CLBED ACFT 2'G PULL-UP; GAR PWR; 3 SECONDS LATER 'INCREASED CLB' DIRECTED PITCH INCREASED TO 25 DEGS NOSE UP AND MAX PWR. 6 SECONDS LATER 'CLR OF CONFLICT.' VISUAL IDENT OF INTRUDER ACFT BY COCKPIT CREW NOT OBSERVED. PAX ON ACFT R MID-CABIN WINDOW SEAT FORWARD OF R WING VISUALLY IDENTED INTRUDER ACFT AT '30 METERS BELOW -- BROWN AND WHITE ACR Y TURBO JET.' MAX ALT DURING AVOIDANCE MANEUVER 9300 FT; SEOUL APCH NOTIFIED; RETURNED TO ASSIGNED ALT; NORMAL APCH AND LAND. WHISKEY 1 DEP KIMPO ALT BUST BY ACR X. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED HE WAS THE FO PF. SECOND ACFT WAS A B767 FOREIGN ACR. WHEN RA WAS RECEIVED RPTR STATED HE MADE A VERY AGGRESSIVE CLB AND WAS TOLD BY THE CAPT HE WAS OVER REACTING. PAX OBSERVING NMAC WAS COMPANY PLT. B767 WENT BELOW ACFT 100 FT. FLC ATC REVIEW TRACON SUPVR STATED FOREIGN ACR HAD BUSTED THE SID ALT RESTR.