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Air carrier medium large transport received TCASII TA and RA from 2 small aircraft aircraft making visual approachs to parallel runways at sjc. Reporter calls this a sandwich maneuver.
| Attributes | |
| ACN | 198551 |
| Time | |
| Date | 199201 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 1000 msl bound upper : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sjc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other landing other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 13000 flight time type : 3500 |
| ASRS Report | 198551 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
TCASII equipped aircraft, operational and in TA/RA mode at time. Visual approach to 30L and cleared to land. Small aircraft on left base to 29 'has us in sight.' small aircraft on right base to 30R and has us 'in sight.' received TA's and RA's at 1000 ft on approach on both aircraft, i.e., a 'sandwich' maneuver with us in the middle. Did not accomplish a missed approach since both intruders had us in sight, but very disconcerting at this position on approach. Our company procedures require TCASII to be on until leaving 1000 ft AGL. Sjc is one of those peculiar airports that has this kind of traffic mix which could lead to unwarranted gars due to RA's.
Original NASA ASRS Text
Title: ACR MLG RECEIVED TCASII TA AND RA FROM 2 SMA ACFT MAKING VISUAL APCHS TO PARALLEL RWYS AT SJC. RPTR CALLS THIS A SANDWICH MANEUVER.
Narrative: TCASII EQUIPPED ACFT, OPERATIONAL AND IN TA/RA MODE AT TIME. VISUAL APCH TO 30L AND CLRED TO LAND. SMALL ACFT ON L BASE TO 29 'HAS US IN SIGHT.' SMALL ACFT ON R BASE TO 30R AND HAS US 'IN SIGHT.' RECEIVED TA'S AND RA'S AT 1000 FT ON APCH ON BOTH ACFT, I.E., A 'SANDWICH' MANEUVER WITH US IN THE MIDDLE. DID NOT ACCOMPLISH A MISSED APCH SINCE BOTH INTRUDERS HAD US IN SIGHT, BUT VERY DISCONCERTING AT THIS POS ON APCH. OUR COMPANY PROCS REQUIRE TCASII TO BE ON UNTIL LEAVING 1000 FT AGL. SJC IS ONE OF THOSE PECULIAR ARPTS THAT HAS THIS KIND OF TFC MIX WHICH COULD LEAD TO UNWARRANTED GARS DUE TO RA'S.
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.