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GA pilot initiates evasive maneuver from issued air carrier traffic departing sjc while under O90 control.
| Attributes | |
| ACN | 517255 |
| Time | |
| Date | 200107 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sjc.airport |
| State Reference | CA |
| Altitude | msl bound lower : 4200 msl bound upper : 4500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : o90.tracon tower : hef.tower |
| Operator | general aviation : personal |
| Make Model Name | Experimental |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : o90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : multi engine pilot : instrument |
| Experience | flight time last 90 days : 25 flight time total : 2500 flight time type : 220 |
| ASRS Report | 517255 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued advisory flight crew : took evasive action flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 1000 vertical : 200 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure ATC Human Performance |
| Primary Problem | Airspace Structure |
Narrative:
Lancair departed trk approximately XA45 VFR to pao, flight following entire route. Contacted bay approach with pao ATIS information. Requested VOR/DME pao runway 31 approach. Directed to maintain 4500 ft vectors toward sjc VOR, xfer frequency, direct sjc at 4500 ft VFR. Traffic given for MD80 departing sjc right turn climb out from runway 30. MD80 traffic in sight through entire event period. Lancair approximately 3 mi north heading approximately 185 degrees off sjc at 4500 ft direct sjc VOR. MD80 climbing right turn then heading approximately 120 degrees, VFR conditions. The 2 aircraft converged rapidly -- vertically and horizontally. Lancair pilot and passenger observing MD80 at or close to lancair altitude and appearing to be climbing at distance of less than 1/2 mi. Lancair descended 4500 ft to 4200 ft indicated altitude, and turned left slightly. MD80 turned right and passed in front and slightly above lancair. MD80 horizontal distance approximately 1000 ft, vertical approximately 200 ft above lancair. Lancair returned to 4500 ft and completed approach to pao. Lancair contacted approach control immediately at time of diversion and return to 4500 ft. Diversion required for safety separation.
Original NASA ASRS Text
Title: GA PLT INITIATES EVASIVE MANEUVER FROM ISSUED ACR TFC DEPARTING SJC WHILE UNDER O90 CTL.
Narrative: LANCAIR DEPARTED TRK APPROX XA45 VFR TO PAO, FLT FOLLOWING ENTIRE RTE. CONTACTED BAY APCH WITH PAO ATIS INFO. REQUESTED VOR/DME PAO RWY 31 APCH. DIRECTED TO MAINTAIN 4500 FT VECTORS TOWARD SJC VOR, XFER FREQ, DIRECT SJC AT 4500 FT VFR. TFC GIVEN FOR MD80 DEPARTING SJC R TURN CLBOUT FROM RWY 30. MD80 TFC IN SIGHT THROUGH ENTIRE EVENT PERIOD. LANCAIR APPROX 3 MI N HDG APPROX 185 DEGS OFF SJC AT 4500 FT DIRECT SJC VOR. MD80 CLBING R TURN THEN HDG APPROX 120 DEGS, VFR CONDITIONS. THE 2 ACFT CONVERGED RAPIDLY -- VERTLY AND HORIZLY. LANCAIR PLT AND PAX OBSERVING MD80 AT OR CLOSE TO LANCAIR ALT AND APPEARING TO BE CLBING AT DISTANCE OF LESS THAN 1/2 MI. LANCAIR DSNDED 4500 FT TO 4200 FT INDICATED ALT, AND TURNED L SLIGHTLY. MD80 TURNED R AND PASSED IN FRONT AND SLIGHTLY ABOVE LANCAIR. MD80 HORIZ DISTANCE APPROX 1000 FT, VERT APPROX 200 FT ABOVE LANCAIR. LANCAIR RETURNED TO 4500 FT AND COMPLETED APCH TO PAO. LANCAIR CONTACTED APCH CTL IMMEDIATELY AT TIME OF DIVERSION AND RETURN TO 4500 FT. DIVERSION REQUIRED FOR SAFETY SEPARATION.
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.