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Medium large transport flight crew cleared and descending notices target on TCASII. Receives RA to descend. Complies.
| Attributes | |
| ACN | 212681 |
| Time | |
| Date | 199206 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 30000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 125 flight time total : 20000 flight time type : 480 |
| ASRS Report | 212681 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 6000 flight time type : 200 |
| ASRS Report | 213338 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure non adherence : far other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 750 vertical : 750 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
We were cleared from FL330 to FL240, pilot discretion after 290. During descent at approximately FL305 I noticed a TCASII display of an aircraft at 310 ahead of us. As I was adjusting the display range to get a better idea of where he was, we received a TCASII RA to descend. We complied immediately and visually observed an medium large transport pass overhead approximately 500- 1000 above us. Shortly after the RA was received ATC told us to expedite descent. I advised ATC we had received a RA. I think ATC had not noticed the relative position of the 2 aircraft. TCASII worked as advertised!
Original NASA ASRS Text
Title: MLG FLC CLRED AND DSNDING NOTICES TARGET ON TCASII. RECEIVES RA TO DSND. COMPLIES.
Narrative: WE WERE CLRED FROM FL330 TO FL240, PLT DISCRETION AFTER 290. DURING DSCNT AT APPROX FL305 I NOTICED A TCASII DISPLAY OF AN ACFT AT 310 AHEAD OF US. AS I WAS ADJUSTING THE DISPLAY RANGE TO GET A BETTER IDEA OF WHERE HE WAS, WE RECEIVED A TCASII RA TO DSND. WE COMPLIED IMMEDIATELY AND VISUALLY OBSERVED AN MLG PASS OVERHEAD APPROX 500- 1000 ABOVE US. SHORTLY AFTER THE RA WAS RECEIVED ATC TOLD US TO EXPEDITE DSCNT. I ADVISED ATC WE HAD RECEIVED A RA. I THINK ATC HAD NOT NOTICED THE RELATIVE POS OF THE 2 ACFT. TCASII WORKED AS ADVERTISED!
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.