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Near midair collision between a B757 on final to parallel runways and an MD11 converging from the right rear. When the reporting crew observed the MD11, it was in a right turn away from their aircraft. TCASII issued a TA only.
| Attributes | |
| ACN | 383225 |
| Time | |
| Date | 199710 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 1500 msl bound upper : 2200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : dfw |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 383225 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
We got a TCASII TA at 300 ft vertical separation rapidly closing to 0. Angle of approach was from approximately 4 O'clock position. Visual contact was made through the right aft cockpit window with an MD11 in a right turn. Closest lateral separation was about 500 ft. No evasive action was required. Two things concern me. No RA was issued and control of runways 35C and 35L traffic is under 2 local controllers, diminishing ability to rapidly communicate with pilots on close simultaneous parallel approachs. Thanks for your review of this report.
Original NASA ASRS Text
Title: NMAC BTWN A B757 ON FINAL TO PARALLEL RWYS AND AN MD11 CONVERGING FROM THE R REAR. WHEN THE RPTING CREW OBSERVED THE MD11, IT WAS IN A R TURN AWAY FROM THEIR ACFT. TCASII ISSUED A TA ONLY.
Narrative: WE GOT A TCASII TA AT 300 FT VERT SEPARATION RAPIDLY CLOSING TO 0. ANGLE OF APCH WAS FROM APPROX 4 O'CLOCK POS. VISUAL CONTACT WAS MADE THROUGH THE R AFT COCKPIT WINDOW WITH AN MD11 IN A R TURN. CLOSEST LATERAL SEPARATION WAS ABOUT 500 FT. NO EVASIVE ACTION WAS REQUIRED. TWO THINGS CONCERN ME. NO RA WAS ISSUED AND CTL OF RWYS 35C AND 35L TFC IS UNDER 2 LCL CTLRS, DIMINISHING ABILITY TO RAPIDLY COMMUNICATE WITH PLTS ON CLOSE SIMULTANEOUS PARALLEL APCHS. THANKS FOR YOUR REVIEW OF THIS RPT.
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.