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A beech starship proximity alerts the TCASII of a B757, creating an evasive action maneuver on the part of the B757 crew while on a visual approach to sfo, ca.
| Attributes | |
| ACN | 526857 |
| Time | |
| Date | 200110 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sfo.airport |
| State Reference | CA |
| Altitude | msl single value : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : o90.tracon artcc : zau.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Starship Model 2000 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : o90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 200 flight time total : 2500 flight time type : 150 |
| ASRS Report | 526857 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne critical non adherence : required legal separation non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment : tcas other flight crewa other flight crewb |
| Resolutory Action | flight crew : took evasive action |
| Miss Distance | horizontal : 3000 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were on vectors to expect a visual approach to runway 28R at sfo airport. On a heading of 180 degrees we were advised of traffic, a B737 and a B757. We had both aircraft in sight and reported this. We were then issued a visual approach to runway 28R. At the time of the issuance of the visual approach we were just receiving the localizer needle and proceeded to turn right to runway 28R. We had a B757 in sight through the entire approach and maintained visual separation. The B757 was above and to our left and descended abeam us as we slowed to our landing gear extension speed. The B757 was slightly ahead and to our left. At this time, they (B757) temporarily broke off the approach due to a TCASII warning. At no time were any aircraft in danger. I feel that the B757 used appropriate action in breaking off their approach. It is unclr to me if they had a visual on us. At no time did we lose sight of the B757. I feel that if we were issued a vector earlier to the final approach course and/or less than the 100 degree turn that we received to intercept the final approach course, this problem may not have occurred.
Original NASA ASRS Text
Title: A BEECH STARSHIP PROX ALERTS THE TCASII OF A B757, CREATING AN EVASIVE ACTION MANEUVER ON THE PART OF THE B757 CREW WHILE ON A VISUAL APCH TO SFO, CA.
Narrative: WE WERE ON VECTORS TO EXPECT A VISUAL APCH TO RWY 28R AT SFO ARPT. ON A HDG OF 180 DEGS WE WERE ADVISED OF TFC, A B737 AND A B757. WE HAD BOTH ACFT IN SIGHT AND RPTED THIS. WE WERE THEN ISSUED A VISUAL APCH TO RWY 28R. AT THE TIME OF THE ISSUANCE OF THE VISUAL APCH WE WERE JUST RECEIVING THE LOC NEEDLE AND PROCEEDED TO TURN R TO RWY 28R. WE HAD A B757 IN SIGHT THROUGH THE ENTIRE APCH AND MAINTAINED VISUAL SEPARATION. THE B757 WAS ABOVE AND TO OUR L AND DSNDED ABEAM US AS WE SLOWED TO OUR LNDG GEAR EXTENSION SPD. THE B757 WAS SLIGHTLY AHEAD AND TO OUR L. AT THIS TIME, THEY (B757) TEMPORARILY BROKE OFF THE APCH DUE TO A TCASII WARNING. AT NO TIME WERE ANY ACFT IN DANGER. I FEEL THAT THE B757 USED APPROPRIATE ACTION IN BREAKING OFF THEIR APCH. IT IS UNCLR TO ME IF THEY HAD A VISUAL ON US. AT NO TIME DID WE LOSE SIGHT OF THE B757. I FEEL THAT IF WE WERE ISSUED A VECTOR EARLIER TO THE FINAL APCH COURSE AND/OR LESS THAN THE 100 DEG TURN THAT WE RECEIVED TO INTERCEPT THE FINAL APCH COURSE, THIS PROB MAY NOT HAVE OCCURRED.
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.