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Aircraft flight crew copied and read back descent clearance meant for another aircraft with similar call sign. On descent, ATC controller advised that clearance was for another aircraft and reclred crew to maintain original flight level.
| Attributes | |
| ACN | 423330 |
| Time | |
| Date | 199812 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : irq |
| State Reference | GA |
| Altitude | msl bound lower : 32000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 120 flight time total : 20000 flight time type : 30 |
| ASRS Report | 423330 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 7000 flight time type : 300 |
| ASRS Report | 423329 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
All 3 cockpit crew members thought we heard a clearance for air carrier xxy to descend to FL280. We acknowledged the clearance and left our cruise altitude of FL330. Descended at 1000 FPM passing FL320. ZTL asked our altitude. We stated passing FL320 to FL280. Controller said that clearance was for air carrier xyy and to return to FL330. ATC then apologized for not informing us of a similar sounding call sign. That was the first we had heard of air carrier xyy, as they were not even on frequency yet. I asked center if there was any conflict. He stated, that no conflict existed. Controller was very busy at the time.
Original NASA ASRS Text
Title: ACFT FLC COPIED AND READ BACK DSCNT CLRNC MEANT FOR ANOTHER ACFT WITH SIMILAR CALL SIGN. ON DSCNT, ATC CTLR ADVISED THAT CLRNC WAS FOR ANOTHER ACFT AND RECLRED CREW TO MAINTAIN ORIGINAL FLT LEVEL.
Narrative: ALL 3 COCKPIT CREW MEMBERS THOUGHT WE HEARD A CLRNC FOR ACR XXY TO DSND TO FL280. WE ACKNOWLEDGED THE CLRNC AND LEFT OUR CRUISE ALT OF FL330. DSNDED AT 1000 FPM PASSING FL320. ZTL ASKED OUR ALT. WE STATED PASSING FL320 TO FL280. CTLR SAID THAT CLRNC WAS FOR ACR XYY AND TO RETURN TO FL330. ATC THEN APOLOGIZED FOR NOT INFORMING US OF A SIMILAR SOUNDING CALL SIGN. THAT WAS THE FIRST WE HAD HEARD OF ACR XYY, AS THEY WERE NOT EVEN ON FREQ YET. I ASKED CTR IF THERE WAS ANY CONFLICT. HE STATED, THAT NO CONFLICT EXISTED. CTLR WAS VERY BUSY AT THE TIME.
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.