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A319 flight crew react to TCAS RA on approach to sfo runway 28L from another A320 crossing above and behind turning inbound for runway 28R.
| Attributes | |
| ACN | 523393 |
| Time | |
| Date | 200108 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sfo.airport |
| State Reference | CA |
| Altitude | msl bound lower : 1300 msl bound upper : 2100 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : sfo.tower tower : slc.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : sfo.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 13000 flight time type : 3500 |
| ASRS Report | 523393 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : nmac conflict : airborne critical |
| Independent Detector | atc equipment : msaw aircraft equipment : tcas other controllera other flight crewa |
| Resolutory Action | controller : issued alert flight crew : took evasive action flight crew : returned to assigned airspace |
| Miss Distance | horizontal : 200 vertical : 200 |
| Supplementary | |
| Problem Areas | Airport Airspace Structure Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We were cleared for bridge visual approach to runway 28 sfo. Normal crossing altitude is 1800 MSL. Just prior to reaching 1800 MSL (crossing altitude at san mateo bridge), we got an RA to descend. It was possibly caused by an air carrier Y flight which was closing from behind us and landing on runway 28R at sfo. ATC had advised us of air carrier Y traffic. We had it in sight until we turned final, when it was behind us and out of sight. When we heard the RA, we took evasive action and went down to 1300 MSL. ATC gave us an altitude alert call at 1300 ft. Simultaneously, air carrier Y passed us and the RA stopped. RA may have started at 2100 ft MSL. We climbed back up to the GS altitude and continued with an uneventful, normal landing.
Original NASA ASRS Text
Title: A319 FLC REACT TO TCAS RA ON APCH TO SFO RWY 28L FROM ANOTHER A320 CROSSING ABOVE AND BEHIND TURNING INBOUND FOR RWY 28R.
Narrative: WE WERE CLRED FOR BRIDGE VISUAL APCH TO RWY 28 SFO. NORMAL CROSSING ALTITUDE IS 1800 MSL. JUST PRIOR TO REACHING 1800 MSL (CROSSING ALTITUDE AT SAN MATEO BRIDGE), WE GOT AN RA TO DESCEND. IT WAS POSSIBLY CAUSED BY AN ACR Y FLT WHICH WAS CLOSING FROM BEHIND US AND LANDING ON RWY 28R AT SFO. ATC HAD ADVISED US OF ACR Y TFC. WE HAD IT IN SIGHT UNTIL WE TURNED FINAL, WHEN IT WAS BEHIND US AND OUT OF SIGHT. WHEN WE HEARD THE RA, WE TOOK EVASIVE ACTION AND WENT DOWN TO 1300 MSL. ATC GAVE US AN ALTITUDE ALERT CALL AT 1300 FT. SIMULTANEOUSLY, ACR Y PASSED US AND THE RA STOPPED. RA MAY HAVE STARTED AT 2100 FT MSL. WE CLIMBED BACK UP TO THE GS ALTITUDE AND CONTINUED WITH AN UNEVENTFUL, NORMAL LANDING.
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.