Narrative:

On bridge FMS visual runway 28R sfo, closely spaced approach with aircraft Y. We were lead aircraft with aircraft Y maintaining visual with us. Spacing was very close and trailing aircraft appeared to be in a 'sucked' (military term) position relative to us. I saw the aircraft at our 7 O'clock position, lost sight (although he was following us) and received a 'traffic, traffic' alert. Before the first officer could secure the traffic mode, we received a 'climb, climb' RA. Since the descend RA was inhibited due to our altitude, and believing the intruder to be above us, I ignored the RA. Shortly thereafter, I reacquired visual on the other aircraft as he corrected back to runway 28L centerline, passing us in the process. At no time did we cross the extended centerline of runway 28R, and in fact purposely set up to the right side of the runway. We had a slightly overshooting crosswind, which should have caused the intruder to undershoot. I have extensive military experience in formation flying (3 yrs jet instructor pilot in multi-plane formation) and would estimate our separation to have been 2-3 wingspans prior to my losing visual with the intruder, prior to our RA. I am extremely upset with the intruding aircraft crew for failing to maintain separation while at the same time putting my aircraft into a 'box' where the proscribed procedure (a go around from landing confign) was a questionable one due to the proximity to the ground and the inhibition of descending RA when I believed the other aircraft to be above.

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Original NASA ASRS Text

Title: A319 CREW AND ANOTHER ACR ACFT HAVE A CLOSELY SPACED SIDE BY SIDE APCH ON THE 28'S AT SFO.

Narrative: ON BRIDGE FMS VISUAL RWY 28R SFO, CLOSELY SPACED APCH WITH ACFT Y. WE WERE LEAD ACFT WITH ACFT Y MAINTAINING VISUAL WITH US. SPACING WAS VERY CLOSE AND TRAILING ACFT APPEARED TO BE IN A 'SUCKED' (MIL TERM) POS RELATIVE TO US. I SAW THE ACFT AT OUR 7 O'CLOCK POS, LOST SIGHT (ALTHOUGH HE WAS FOLLOWING US) AND RECEIVED A 'TFC, TFC' ALERT. BEFORE THE FO COULD SECURE THE TFC MODE, WE RECEIVED A 'CLB, CLB' RA. SINCE THE DSND RA WAS INHIBITED DUE TO OUR ALT, AND BELIEVING THE INTRUDER TO BE ABOVE US, I IGNORED THE RA. SHORTLY THEREAFTER, I REACQUIRED VISUAL ON THE OTHER ACFT AS HE CORRECTED BACK TO RWY 28L CTRLINE, PASSING US IN THE PROCESS. AT NO TIME DID WE CROSS THE EXTENDED CTRLINE OF RWY 28R, AND IN FACT PURPOSELY SET UP TO THE R SIDE OF THE RWY. WE HAD A SLIGHTLY OVERSHOOTING XWIND, WHICH SHOULD HAVE CAUSED THE INTRUDER TO UNDERSHOOT. I HAVE EXTENSIVE MIL EXPERIENCE IN FORMATION FLYING (3 YRS JET INSTRUCTOR PLT IN MULTI-PLANE FORMATION) AND WOULD ESTIMATE OUR SEPARATION TO HAVE BEEN 2-3 WINGSPANS PRIOR TO MY LOSING VISUAL WITH THE INTRUDER, PRIOR TO OUR RA. I AM EXTREMELY UPSET WITH THE INTRUDING ACFT CREW FOR FAILING TO MAINTAIN SEPARATION WHILE AT THE SAME TIME PUTTING MY ACFT INTO A 'BOX' WHERE THE PROSCRIBED PROC (A GAR FROM LNDG CONFIGN) WAS A QUESTIONABLE ONE DUE TO THE PROX TO THE GND AND THE INHIBITION OF DSNDING RA WHEN I BELIEVED THE OTHER ACFT TO BE ABOVE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.