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Multiple runway operation parallel runways, same runway approach, air carrier Y had conflict with air carrier X. Visual approach visual separation. See and avoid concept.
| Attributes | |
| ACN | 229873 |
| Time | |
| Date | 199212 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 1500 msl bound upper : 1500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : den |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 220 flight time total : 15000 flight time type : 8000 |
| ASRS Report | 229873 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 10200 flight time type : 1500 |
| ASRS Report | 229404 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | horizontal : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Air carrier Y cleared for a visual approach to runway 26R at den subject to maintaining visual separation with air carrier X commuter aircraft on final to runway 25. Air carrier X was our altitude and ahead of us on straight-in final to runway 25. As we were trying to contact the tower (lots of radio traffic) air carrier X slid to the left directly in front of us and lined up with runway 26R. The tower evidently forgot about us, and had air carrier X sidestep to runway 26R to make room for another commuter that was on final for runway 25 behind the first one. Tower then noticed the problem and had the second commuter break off the approach and had air carrier X return to runway 25 final. Landing was normal on runway 26R. Air carrier X landed runway 25. Supplemental information from acn 229403: on approach to den, air carrier X was asked if we could accept runway 25 for landing. We acknowledged yes and were cleared for a visual approach to runway 25. We contacted den tower abeam altur lo OM. We were cleared to land runway 25 -- caution for wake turbulence of widebody transport on final to runway 26L. At approximately 6300 ft MSL (1000 ft AGL) a company flight checked in to den tower for runway 25 landing. After clearing him to land, our flight was told to change to runway 26R -- cleared to land. I maneuvered over to runway 26R when another air carrier Y asked the tower what was going on. He asked in an urgent manner. Den tower told air carrier Y he was cleared to land runway 26R. He told us to change back to runway 25 -- cleared to land. The controller then told the company flight to go around providing him with vectors. This all occurred at approximately 500 ft AGL. As soon as I maneuvered back to runway 25, air carrier Y passed off our left wing.
Original NASA ASRS Text
Title: MULTIPLE RWY OP PARALLEL RWYS, SAME RWY APCH, ACR Y HAD CONFLICT WITH ACR X. VISUAL APCH VISUAL SEPARATION. SEE AND AVOID CONCEPT.
Narrative: ACR Y CLRED FOR A VISUAL APCH TO RWY 26R AT DEN SUBJECT TO MAINTAINING VISUAL SEPARATION WITH ACR X COMMUTER ACFT ON FINAL TO RWY 25. ACR X WAS OUR ALT AND AHEAD OF US ON STRAIGHT-IN FINAL TO RWY 25. AS WE WERE TRYING TO CONTACT THE TWR (LOTS OF RADIO TFC) ACR X SLID TO THE L DIRECTLY IN FRONT OF US AND LINED UP WITH RWY 26R. THE TWR EVIDENTLY FORGOT ABOUT US, AND HAD ACR X SIDESTEP TO RWY 26R TO MAKE ROOM FOR ANOTHER COMMUTER THAT WAS ON FINAL FOR RWY 25 BEHIND THE FIRST ONE. TWR THEN NOTICED THE PROB AND HAD THE SECOND COMMUTER BREAK OFF THE APCH AND HAD ACR X RETURN TO RWY 25 FINAL. LNDG WAS NORMAL ON RWY 26R. ACR X LANDED RWY 25. SUPPLEMENTAL INFO FROM ACN 229403: ON APCH TO DEN, ACR X WAS ASKED IF WE COULD ACCEPT RWY 25 FOR LNDG. WE ACKNOWLEDGED YES AND WERE CLRED FOR A VISUAL APCH TO RWY 25. WE CONTACTED DEN TWR ABEAM ALTUR LO OM. WE WERE CLRED TO LAND RWY 25 -- CAUTION FOR WAKE TURB OF WDB ON FINAL TO RWY 26L. AT APPROX 6300 FT MSL (1000 FT AGL) A COMPANY FLT CHKED IN TO DEN TWR FOR RWY 25 LNDG. AFTER CLRING HIM TO LAND, OUR FLT WAS TOLD TO CHANGE TO RWY 26R -- CLRED TO LAND. I MANEUVERED OVER TO RWY 26R WHEN ANOTHER ACR Y ASKED THE TWR WHAT WAS GOING ON. HE ASKED IN AN URGENT MANNER. DEN TWR TOLD ACR Y HE WAS CLRED TO LAND RWY 26R. HE TOLD US TO CHANGE BACK TO RWY 25 -- CLRED TO LAND. THE CTLR THEN TOLD THE COMPANY FLT TO GAR PROVIDING HIM WITH VECTORS. THIS ALL OCCURRED AT APPROX 500 FT AGL. AS SOON AS I MANEUVERED BACK TO RWY 25, ACR Y PASSED OFF OUR L WING.
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.