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Multiple runway operation parallel runways. Air carrier X TCASII RA from air carrier Y on visual approach to parallel runway. See and avoid concept.
| Attributes | |
| ACN | 243692 |
| Time | |
| Date | 199306 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 8300 msl bound upper : 8300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : den |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent : approach descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| 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 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 45 flight time total : 8500 flight time type : 45 |
| ASRS Report | 243692 |
| 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 | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | vertical : 800 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
Air carrier requested runway 26L upon initial contact with approach control. We were given radar vectors to runway 26L, den landing both runways 26L and right. Our altitude was 9000 ft when we called airport in sight. Controller gave a final vector and cleared us the visual. Controller called air carrier Y inbound to runway 26R had us in sight. Our position was approximately 8 northeast. Began descent out of 9000. TCASII issued TA. At 8300 ft, controller told us to stop our descent, TCASII issued an RA. Vertical separation approximately 800 ft. Air carrier Y was crossing under us to go to runway 26R. Captain got the crossing traffic in sight, therefore, no other evasive action was taken. It was a confusing situation. Den department us high, apparently for the approach path of runway 26R, and they vectored us into the airport quite tight. We were then cleared the visual approach prior to crossing runway 26R's approach path. We were not issued an altitude restriction nor traffic to be concerned about. We were told that the traffic going to runway 26R had us in sight. The TCASII alert was unexpected, but since the captain was able to sight air carrier Y, no other evasive action was taken other than that directed by the controller.
Original NASA ASRS Text
Title: MULTIPLE RWY OP PARALLEL RWYS. ACR X TCASII RA FROM ACR Y ON VISUAL APCH TO PARALLEL RWY. SEE AND AVOID CONCEPT.
Narrative: ACR REQUESTED RWY 26L UPON INITIAL CONTACT WITH APCH CTL. WE WERE GIVEN RADAR VECTORS TO RWY 26L, DEN LNDG BOTH RWYS 26L AND R. OUR ALT WAS 9000 FT WHEN WE CALLED ARPT IN SIGHT. CTLR GAVE A FINAL VECTOR AND CLRED US THE VISUAL. CTLR CALLED ACR Y INBOUND TO RWY 26R HAD US IN SIGHT. OUR POS WAS APPROX 8 NE. BEGAN DSCNT OUT OF 9000. TCASII ISSUED TA. AT 8300 FT, CTLR TOLD US TO STOP OUR DSCNT, TCASII ISSUED AN RA. VERT SEPARATION APPROX 800 FT. ACR Y WAS XING UNDER US TO GO TO RWY 26R. CAPT GOT THE XING TFC IN SIGHT, THEREFORE, NO OTHER EVASIVE ACTION WAS TAKEN. IT WAS A CONFUSING SIT. DEN DEPT US HIGH, APPARENTLY FOR THE APCH PATH OF RWY 26R, AND THEY VECTORED US INTO THE ARPT QUITE TIGHT. WE WERE THEN CLRED THE VISUAL APCH PRIOR TO XING RWY 26R'S APCH PATH. WE WERE NOT ISSUED AN ALT RESTRICTION NOR TFC TO BE CONCERNED ABOUT. WE WERE TOLD THAT THE TFC GOING TO RWY 26R HAD US IN SIGHT. THE TCASII ALERT WAS UNEXPECTED, BUT SINCE THE CAPT WAS ABLE TO SIGHT ACR Y, NO OTHER EVASIVE ACTION WAS TAKEN OTHER THAN THAT DIRECTED BY THE CTLR.
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.