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Flight crew took clearance intended for another aircraft and descended to FL330 from FL350. The controller failed to catch the readback.
| Attributes | |
| ACN | 324468 |
| Time | |
| Date | 199512 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : zob |
| State Reference | OH |
| Altitude | msl bound lower : 33000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp pilot : commercial pilot : instrument pilot : flight engineer |
| Experience | flight time last 90 days : 100 flight time total : 11000 flight time type : 2200 |
| ASRS Report | 324468 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 5000 flight time type : 1800 |
| ASRS Report | 323640 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
ZOB 133.87. We read back a clearance to descend to FL330 from FL350. Upon reaching FL330 center advised us that we must have taken a clearance for another aircraft, but to maintain FL330 as it was no problem. Also our full call sign 'air carrier XXXX' was used.
Original NASA ASRS Text
Title: FLC TOOK CLRNC INTENDED FOR ANOTHER ACFT AND DSNDED TO FL330 FROM FL350. THE CTLR FAILED TO CATCH THE READBACK.
Narrative: ZOB 133.87. WE READ BACK A CLRNC TO DSND TO FL330 FROM FL350. UPON REACHING FL330 CTR ADVISED US THAT WE MUST HAVE TAKEN A CLRNC FOR ANOTHER ACFT, BUT TO MAINTAIN FL330 AS IT WAS NO PROB. ALSO OUR FULL CALL SIGN 'ACR XXXX' WAS USED.
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.