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A320 thought they were cleared to descend to 4000 ft. ATC claimed they were only cleared to 5000 ft. They got to 4400 ft before correcting. Reporter suggests there may have been an ATC coordination mixup.
| Attributes | |
| ACN | 362500 |
| Time | |
| Date | 199702 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : dxo airport : dtw |
| State Reference | MI |
| Altitude | msl bound lower : 4400 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dtw |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 210 flight time total : 14000 flight time type : 3000 |
| ASRS Report | 362500 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 14000 flight time type : 3000 |
| ASRS Report | 362119 |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Pilot Deviation |
Narrative:
Cleared to 4000 ft. Next controller said we should be at 5000 ft. As we were descending through 4600 ft, climbed back to 5000 ft, after descending to 4400 ft. We had been given a lot of vectors, altitude changes, and speed changes -- probably due to high winds and use of runways 27L/right. It appeared there was a lack of communication between controllers.
Original NASA ASRS Text
Title: A320 THOUGHT THEY WERE CLRED TO DSND TO 4000 FT. ATC CLAIMED THEY WERE ONLY CLRED TO 5000 FT. THEY GOT TO 4400 FT BEFORE CORRECTING. RPTR SUGGESTS THERE MAY HAVE BEEN AN ATC COORD MIXUP.
Narrative: CLRED TO 4000 FT. NEXT CTLR SAID WE SHOULD BE AT 5000 FT. AS WE WERE DSNDING THROUGH 4600 FT, CLBED BACK TO 5000 FT, AFTER DSNDING TO 4400 FT. WE HAD BEEN GIVEN A LOT OF VECTORS, ALT CHANGES, AND SPD CHANGES -- PROBABLY DUE TO HIGH WINDS AND USE OF RWYS 27L/R. IT APPEARED THERE WAS A LACK OF COM BTWN CTLRS.
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.