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Heading track position deviation in radar vectoring for IAP ILS approach. Potential conflict alert from TCASII TA.
| Attributes | |
| ACN | 244745 |
| Time | |
| Date | 199306 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 2500 flight time type : 400 |
| ASRS Report | 244745 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While on a 10 mi base to final for runway 18R at dfw airport, our TCASII gave us a 'traffic, traffic' alert for an aircraft indicating 800 ft below us in a climb at our approximately 12 - 1 O'clock position for 3 mi. We asked the approach controller if he had the traffic. He responded yes there was VFR traffic at 2500 ft (500 ft below us) and told us to turn right to 150 degrees, cleared the ILS runway 18R approach and switch to tower frequency. At this point the TCASII gave us an RA to 'monitor vertical speed.' we followed the TCASII command ensuring we did not descend and attempted to visually acquire the traffic through the broken clouds. The TCASII soon gave us a clear of conflict aural signal. We then noticed we had gone through the localizer course and immediately turned to a 200 degree heading to correct. Tower then called us and told us to turn to a 200 degree heading immediately. We responded that we already had. The rest of the approach and landing was uneventful. I feel if the approach controller had given us an earlier TA we would not have been overloaded by responding to an RA, trying to find the traffic, intercept final and switch to the tower frequency.
Original NASA ASRS Text
Title: HDG TRACK POS DEV IN RADAR VECTORING FOR IAP ILS APCH. POTENTIAL CONFLICT ALERT FROM TCASII TA.
Narrative: WHILE ON A 10 MI BASE TO FINAL FOR RWY 18R AT DFW ARPT, OUR TCASII GAVE US A 'TFC, TFC' ALERT FOR AN ACFT INDICATING 800 FT BELOW US IN A CLB AT OUR APPROX 12 - 1 O'CLOCK POS FOR 3 MI. WE ASKED THE APCH CTLR IF HE HAD THE TFC. HE RESPONDED YES THERE WAS VFR TFC AT 2500 FT (500 FT BELOW US) AND TOLD US TO TURN R TO 150 DEGS, CLRED THE ILS RWY 18R APCH AND SWITCH TO TWR FREQ. AT THIS POINT THE TCASII GAVE US AN RA TO 'MONITOR VERT SPD.' WE FOLLOWED THE TCASII COMMAND ENSURING WE DID NOT DSND AND ATTEMPTED TO VISUALLY ACQUIRE THE TFC THROUGH THE BROKEN CLOUDS. THE TCASII SOON GAVE US A CLR OF CONFLICT AURAL SIGNAL. WE THEN NOTICED WE HAD GONE THROUGH THE LOC COURSE AND IMMEDIATELY TURNED TO A 200 DEG HDG TO CORRECT. TWR THEN CALLED US AND TOLD US TO TURN TO A 200 DEG HDG IMMEDIATELY. WE RESPONDED THAT WE ALREADY HAD. THE REST OF THE APCH AND LNDG WAS UNEVENTFUL. I FEEL IF THE APCH CTLR HAD GIVEN US AN EARLIER TA WE WOULD NOT HAVE BEEN OVERLOADED BY RESPONDING TO AN RA, TRYING TO FIND THE TFC, INTERCEPT FINAL AND SWITCH TO THE TWR FREQ.
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.