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Near midair collision between air carrier medium large transport on approach to sjc and light GA aircraft.
| Attributes | |
| ACN | 177972 |
| Time | |
| Date | 199105 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 8000 msl bound upper : 8900 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors enroute airway : v485 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Small Aircraft |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 10800 flight time type : 895 |
| ASRS Report | 177972 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 3000 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
On ILS final to sjc, bay approach warned of conflicting traffic at our 12 O'clock position. We were in VFR conditions, however we were unable to see the traffic. TCAS confirmed the traffic. Conflicting traffic became so close, approach control called for an immediate left turn to 240 degrees and TCAS called for a 2500 FPM climb. A left turn to 240 degrees, 30 degree bank angle and climb to 8900' was executed. Approach control was notified of our maneuver, to which they 'rogered' and called us clear of traffic. They turned us to approximately 310 degrees to reintercept final. Neither pilot saw the traffic visually; however, F/a's in the aircraft did, and said the small aircraft Y was very, very close. Thank god for TCAS!
Original NASA ASRS Text
Title: NMAC BETWEEN ACR MLG ON APCH TO SJC AND LIGHT GA ACFT.
Narrative: ON ILS FINAL TO SJC, BAY APCH WARNED OF CONFLICTING TFC AT OUR 12 O'CLOCK POS. WE WERE IN VFR CONDITIONS, HOWEVER WE WERE UNABLE TO SEE THE TFC. TCAS CONFIRMED THE TFC. CONFLICTING TFC BECAME SO CLOSE, APCH CTL CALLED FOR AN IMMEDIATE LEFT TURN TO 240 DEGS AND TCAS CALLED FOR A 2500 FPM CLB. A LEFT TURN TO 240 DEGS, 30 DEG BANK ANGLE AND CLB TO 8900' WAS EXECUTED. APCH CTL WAS NOTIFIED OF OUR MANEUVER, TO WHICH THEY 'ROGERED' AND CALLED US CLR OF TFC. THEY TURNED US TO APPROX 310 DEGS TO REINTERCEPT FINAL. NEITHER PLT SAW THE TFC VISUALLY; HOWEVER, F/A'S IN THE ACFT DID, AND SAID THE SMA Y WAS VERY, VERY CLOSE. THANK GOD FOR TCAS!
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.