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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier pilot responds to D21 controller's clearance to return to 13000 ft and observes same direction traffic at 12000 ft.
| Attributes | |
| ACN | 515957 |
| Time | |
| Date | 200106 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | intersection : 5701ca |
| State Reference | MI |
| Altitude | msl bound lower : 12000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : d21.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : holding descent : intermediate altitude |
| Route In Use | arrival star : spica2 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time total : 15000 |
| ASRS Report | 515957 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment : tcas other controllera |
| Resolutory Action | none taken : detected after the fact |
| Miss Distance | horizontal : 12000 vertical : 600 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
ATC cleared us out of holding at spica (14000 ft) to dtw via the spica 2 arrival dtw descend and maintain 12000 ft. Passing through 12750, ATC requested us to stop our descent at 13000 ft. We informed them that we would climb back to 13000 ft. Off our nose, we saw another aircraft hold at 12000 ft and at spica. We did not receive a TCASII advisory. Seems we were both moving in the same direction.
Original NASA ASRS Text
Title: ACR PLT RESPONDS TO D21 CTLR'S CLRNC TO RETURN TO 13000 FT AND OBSERVES SAME DIRECTION TFC AT 12000 FT.
Narrative: ATC CLRED US OUT OF HOLDING AT SPICA (14000 FT) TO DTW VIA THE SPICA 2 ARR DTW DSND AND MAINTAIN 12000 FT. PASSING THROUGH 12750, ATC REQUESTED US TO STOP OUR DSCNT AT 13000 FT. WE INFORMED THEM THAT WE WOULD CLB BACK TO 13000 FT. OFF OUR NOSE, WE SAW ANOTHER ACFT HOLD AT 12000 FT AND AT SPICA. WE DID NOT RECEIVE A TCASII ADVISORY. SEEMS WE WERE BOTH MOVING IN THE SAME DIRECTION.
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.