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An S80 flight crew leaves their assigned altitude when receiving a descent clearance that is challenged by approach controller at ord, il.
| Attributes | |
| ACN | 479100 |
| Time | |
| Date | 200007 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl bound lower : 6500 msl bound upper : 7000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : vacating altitude |
| Route In Use | approach : visual arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| ASRS Report | 479100 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Airspace Structure Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
| Situations | |
| Airspace Structure | class b : ord.b |
Narrative:
We were on a left downwind, being vectored for a visual approach to runway 9R. At 7000 ft, directly no F the airport, approach told us to speed up at our discretion, descend and maintain 5000 ft. The captain read back that we were descending to 5000 ft. Passing 6500 ft, approach told us he never cleared us out of 7000 ft. The captain, the jump seater, an ATC controller, and myself all heard 5000 ft. Approach then cleared us to continue descent to 6000 ft. The rest of the flight was uneventful. There was never a traffic conflict, nor a TCASII TA/RA. All of the readback altdevs I have had have been with ord approach. This seems to be a trend.
Original NASA ASRS Text
Title: AN S80 FLC LEAVES THEIR ASSIGNED ALT WHEN RECEIVING A DSCNT CLRNC THAT IS CHALLENGED BY APCH CTLR AT ORD, IL.
Narrative: WE WERE ON A L DOWNWIND, BEING VECTORED FOR A VISUAL APCH TO RWY 9R. AT 7000 FT, DIRECTLY NO F THE ARPT, APCH TOLD US TO SPD UP AT OUR DISCRETION, DSND AND MAINTAIN 5000 FT. THE CAPT READ BACK THAT WE WERE DSNDING TO 5000 FT. PASSING 6500 FT, APCH TOLD US HE NEVER CLRED US OUT OF 7000 FT. THE CAPT, THE JUMP SEATER, AN ATC CTLR, AND MYSELF ALL HEARD 5000 FT. APCH THEN CLRED US TO CONTINUE DSCNT TO 6000 FT. THE REST OF THE FLT WAS UNEVENTFUL. THERE WAS NEVER A TFC CONFLICT, NOR A TCASII TA/RA. ALL OF THE READBACK ALTDEVS I HAVE HAD HAVE BEEN WITH ORD APCH. THIS SEEMS TO BE A TREND.
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.