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Flight crew of a B757 descended further than descent clearance was intended resulting in ATC intervention and given the new altitude at which they were going through. The original clearance was acknowledged and read back.
| Attributes | |
| ACN | 423573 |
| Time | |
| Date | 199812 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 11000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | arrival other enroute airway : dtw |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : private pilot : commercial pilot : cfi pilot : instrument |
| Experience | flight time last 90 days : 130 flight time total : 20950 flight time type : 1650 |
| ASRS Report | 423573 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
2 aircraft in same area with similar call signs. Our was air carrier X, the other was air carrier Y. We acknowledged and read back a clearance to descend from 12000 ft to 10000 ft. As we were passing through 11000 ft, the approach controller said to level off at 11000 ft, that everything was ok, and that he missed our readback. We don't know if we took the clearance from another aircraft, or if controller gave clearance to wrong aircraft. No known solutions for mistaking call signs, or missing readbacks.
Original NASA ASRS Text
Title: FLC OF A B757 DSNDED FURTHER THAN DSCNT CLRNC WAS INTENDED RESULTING IN ATC INTERVENTION AND GIVEN THE NEW ALT AT WHICH THEY WERE GOING THROUGH. THE ORIGINAL CLRNC WAS ACKNOWLEDGED AND READ BACK.
Narrative: 2 ACFT IN SAME AREA WITH SIMILAR CALL SIGNS. OUR WAS ACR X, THE OTHER WAS ACR Y. WE ACKNOWLEDGED AND READ BACK A CLRNC TO DSND FROM 12000 FT TO 10000 FT. AS WE WERE PASSING THROUGH 11000 FT, THE APCH CTLR SAID TO LEVEL OFF AT 11000 FT, THAT EVERYTHING WAS OK, AND THAT HE MISSED OUR READBACK. WE DON'T KNOW IF WE TOOK THE CLRNC FROM ANOTHER ACFT, OR IF CTLR GAVE CLRNC TO WRONG ACFT. NO KNOWN SOLUTIONS FOR MISTAKING CALL SIGNS, OR MISSING READBACKS.
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.