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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier large transport reports close proximity with a commuter mdt both on visual approachs to parallel runways with mdt crossing the large transport's approach path from the left to the right runway.
| Attributes | |
| ACN | 199465 |
| Time | |
| Date | 199201 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : stl |
| State Reference | MO |
| Altitude | msl bound lower : 3000 msl bound upper : 3500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : stl artcc : mjzs |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other landing other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Flight Phase | descent other landing other |
| Route In Use | approach : visual |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial |
| Experience | flight time total : 15354 flight time type : 9879 |
| ASRS Report | 199465 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 1500 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | other |
Narrative:
We were making a visual approach to 30L at stl. We were told to maintain 3500 ft until west of the river and to contact the tower. I then noticed a target (yellow) approaching my aircraft from the left. We had started descending on the GS for 30L and so I noticed also that the altitude separation was diminishing. The target was never mentioned to us in ATC communications. I questioned the stl tower as to traffic in my vicinity. They confirmed there was a commuter mdt crossing over on a visual to 30R and that he had us in sight. I immediately commanded the first officer to stop descending as the TCASII warned to 'monitor climb speed.' TCASII altitude separation indicated '0'. The mdt shortly became visible out the right cockpit window. At this point, we had become quite high on the GS, but were able to salvage the approach.
Original NASA ASRS Text
Title: ACR LGT RPTS CLOSE PROX WITH A COMMUTER MDT BOTH ON VISUAL APCHS TO PARALLEL RWYS WITH MDT XING THE LGT'S APCH PATH FROM THE L TO THE R RWY.
Narrative: WE WERE MAKING A VISUAL APCH TO 30L AT STL. WE WERE TOLD TO MAINTAIN 3500 FT UNTIL W OF THE RIVER AND TO CONTACT THE TWR. I THEN NOTICED A TARGET (YELLOW) APCHING MY ACFT FROM THE L. WE HAD STARTED DSNDING ON THE GS FOR 30L AND SO I NOTICED ALSO THAT THE ALT SEPARATION WAS DIMINISHING. THE TARGET WAS NEVER MENTIONED TO US IN ATC COMS. I QUESTIONED THE STL TWR AS TO TFC IN MY VICINITY. THEY CONFIRMED THERE WAS A COMMUTER MDT XING OVER ON A VISUAL TO 30R AND THAT HE HAD US IN SIGHT. I IMMEDIATELY COMMANDED THE FO TO STOP DSNDING AS THE TCASII WARNED TO 'MONITOR CLB SPD.' TCASII ALT SEPARATION INDICATED '0'. THE MDT SHORTLY BECAME VISIBLE OUT THE R COCKPIT WINDOW. AT THIS POINT, WE HAD BECOME QUITE HIGH ON THE GS, BUT WERE ABLE TO SALVAGE THE APCH.
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.