Narrative:

On the sfo 28L ILS at approximately 5 miles out; gear down/flaps full; hand flying VMC night; received a descending RA. A commuter aircraft was supposedly shooting the ILS 28R at our 3-4 o'clock. We did not see him. I saw a TCAS symbol over our aircraft symbol on the nd. Could not make out an altitude difference. Heard 'traffic; traffic' immediately followed by the descending RA. Did the RA procedure which seemed to last forever. Descended to approximately 700 ft AGL at which time the RA ceased. Recovered the glideslope to land uneventfully. Tower seemed unconcerned and we never saw another aircraft. This incident seems to ask the question 'how long do you hold the RA maneuver when that close to the ground'. Obviously; we don't want to hit the ground nor have a midair.

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Original NASA ASRS Text

Title: An air carrier crew landing on SFO 28L responded to a descending RA at 1;500 FT and recovered at 700 FT. The TCAS traffic was a commuter aircraft on final to SFO 28R.

Narrative: On the SFO 28L ILS at approximately 5 miles out; gear down/flaps full; hand flying VMC night; received a descending RA. A commuter aircraft was supposedly shooting the ILS 28R at our 3-4 o'clock. We did not see him. I saw a TCAS symbol over our aircraft symbol on the ND. Could not make out an altitude difference. Heard 'traffic; traffic' immediately followed by the descending RA. Did the RA procedure which seemed to last forever. Descended to approximately 700 FT AGL at which time the RA ceased. Recovered the glideslope to land uneventfully. Tower seemed unconcerned and we never saw another aircraft. This incident seems to ask the question 'how long do you hold the RA maneuver when that close to the ground'. Obviously; we don't want to hit the ground nor have a midair.

Data retrieved from NASA's ASRS site as of April 2012 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.