 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ATC operational error resulted in an mlt and an medium large transport aircraft having less than standard separation.
| Attributes | |
| ACN | 232366 |
| Time | |
| Date | 199301 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bwi |
| State Reference | MD |
| Altitude | msl bound lower : 20000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Medium Large Transport |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 12000 flight time type : 4800 |
| ASRS Report | 232366 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 8000 flight time type : 2500 |
| ASRS Report | 232803 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Miss Distance | horizontal : 12000 vertical : 1000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
ATC cleared us to descend from FL240 to FL190. While passing through FL210 we saw an mlt aircraft on TCASII and visually passing from left to right about 2 mi in front of us. TCASII indicated the mlt at FL200. We received a TA from TCASII, but no RA as the mlt passed off to our right about 2 NM. We asked ATC about the mlt and they immediately asked us to change to a new ATC radio frequency.
Original NASA ASRS Text
Title: ATC OPERROR RESULTED IN AN MLT AND AN MLG ACFT HAVING LTSS.
Narrative: ATC CLRED US TO DSND FROM FL240 TO FL190. WHILE PASSING THROUGH FL210 WE SAW AN MLT ACFT ON TCASII AND VISUALLY PASSING FROM L TO R ABOUT 2 MI IN FRONT OF US. TCASII INDICATED THE MLT AT FL200. WE RECEIVED A TA FROM TCASII, BUT NO RA AS THE MLT PASSED OFF TO OUR R ABOUT 2 NM. WE ASKED ATC ABOUT THE MLT AND THEY IMMEDIATELY ASKED US TO CHANGE TO A NEW ATC RADIO 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.