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B727 aircraft cleared for descent. All flight crew members heard altitude of 10000 ft, but when descending through 10400 ft approach controller intervened and said they were cleared to 11000 ft.
| Attributes | |
| ACN | 380590 |
| Time | |
| Date | 199709 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ord |
| State Reference | IL |
| Altitude | msl bound lower : 10400 msl bound upper : 11000 |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Route In Use | enroute airway : ord |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 380590 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| ASRS Report | 380591 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera other other : unspecified atc |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
During maneuvering for arrival to ord following radar vectors, received a clearance at approximately XA30Z to descend from 16000 ft to 10000 ft. At approximately XA34Z and while passing 10400 ft for 10000 ft, received a clearance to 'climb back to 11000 ft.' I climbed immediately to 11000 ft and requested the controller to verify our clearance was to descend to 10000 ft. He replied our clearance was to descend to 11000 ft. I was the PF and heard descend to 10000 ft and acknowledged the copilot's selecting 10000 ft on the altitude alert. The copilot read back 10000 ft. The flight engineer verified the clearance was to descend to 10000 ft. This event was marked by frequent complex clrncs due to WX affecting ord. We did not intentionally deviate from the clearance we were corrected back to, and in discussing the problem we could not discover we had made a readback error.
Original NASA ASRS Text
Title: B727 ACFT CLRED FOR DSCNT. ALL FLC MEMBERS HEARD ALT OF 10000 FT, BUT WHEN DSNDING THROUGH 10400 FT APCH CTLR INTERVENED AND SAID THEY WERE CLRED TO 11000 FT.
Narrative: DURING MANEUVERING FOR ARR TO ORD FOLLOWING RADAR VECTORS, RECEIVED A CLRNC AT APPROX XA30Z TO DSND FROM 16000 FT TO 10000 FT. AT APPROX XA34Z AND WHILE PASSING 10400 FT FOR 10000 FT, RECEIVED A CLRNC TO 'CLB BACK TO 11000 FT.' I CLBED IMMEDIATELY TO 11000 FT AND REQUESTED THE CTLR TO VERIFY OUR CLRNC WAS TO DSND TO 10000 FT. HE REPLIED OUR CLRNC WAS TO DSND TO 11000 FT. I WAS THE PF AND HEARD DSND TO 10000 FT AND ACKNOWLEDGED THE COPLT'S SELECTING 10000 FT ON THE ALT ALERT. THE COPLT READ BACK 10000 FT. THE FE VERIFIED THE CLRNC WAS TO DSND TO 10000 FT. THIS EVENT WAS MARKED BY FREQUENT COMPLEX CLRNCS DUE TO WX AFFECTING ORD. WE DID NOT INTENTIONALLY DEVIATE FROM THE CLRNC WE WERE CORRECTED BACK TO, AND IN DISCUSSING THE PROB WE COULD NOT DISCOVER WE HAD MADE A READBACK ERROR.
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.