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Flight crew of medium large transport on heading for high approach saw traffic conflict. Started turn. TCAS warning then RA called for descent. Descent resolved traffic conflict.
| Attributes | |
| ACN | 169114 |
| Time | |
| Date | 199101 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ont |
| State Reference | CA |
| Altitude | msl bound lower : 4200 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : ont artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : cfi pilot : commercial pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 15000 flight time type : 300 |
| ASRS Report | 169114 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : ground less severe other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
On approach into ont, aircraft was held high until late in the approach. While on inbound to petis on approximately 290 degree heading, approach control asked if needed a vector for too high. Confusion resulted about whether vector was 230 degree heading or 330 degree heading. WX was VFR, VMC. While turning to 330 degree heading an aircraft was sighted at 1 O'clock high. We called to confirm heading of 330 degrees and initiated a left descending turn back to 230 degrees. During turn and descent, TCAS called traffic. TCAS RA called for descent continued descent and turn and conflict resolved. Traffic passed high and right. Earlier descent clearance is necessary. This is a recurring problem at ont. Rapid changes in clearance (headings, altitudes, fixes) should be avoided. Prior planning by approach control would eliminate the entire problem. Traffic advisory by ATC needed. Monitoring of aircraft on vectors poor.
Original NASA ASRS Text
Title: FLT CREW OF MLG ON HEADING FOR HIGH APCH SAW TRAFFIC CONFLICT. STARTED TURN. TCAS WARNING THEN RA CALLED FOR DESCENT. DESCENT RESOLVED TRAFFIC CONFLICT.
Narrative: ON APCH INTO ONT, ACFT WAS HELD HIGH UNTIL LATE IN THE APCH. WHILE ON INBND TO PETIS ON APPROX 290 DEG HDG, APCH CTL ASKED IF NEEDED A VECTOR FOR TOO HIGH. CONFUSION RESULTED ABOUT WHETHER VECTOR WAS 230 DEG HDG OR 330 DEG HDG. WX WAS VFR, VMC. WHILE TURNING TO 330 DEG HDG AN ACFT WAS SIGHTED AT 1 O'CLOCK HIGH. WE CALLED TO CONFIRM HDG OF 330 DEGS AND INITIATED A LEFT DSNDING TURN BACK TO 230 DEGS. DURING TURN AND DSNT, TCAS CALLED TFC. TCAS RA CALLED FOR DSNT CONTINUED DSNT AND TURN AND CONFLICT RESOLVED. TFC PASSED HIGH AND RIGHT. EARLIER DSNT CLRNC IS NECESSARY. THIS IS A RECURRING PROB AT ONT. RAPID CHANGES IN CLRNC (HDGS, ALTS, FIXES) SHOULD BE AVOIDED. PRIOR PLANNING BY APCH CTL WOULD ELIMINATE THE ENTIRE PROB. TFC ADVISORY BY ATC NEEDED. MONITORING OF ACFT ON VECTORS POOR.
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.