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A DO328 first officer reported that he responded to the clearance for another company aircraft with a similar sounding call sign, which caused an altitude deviation.
| Attributes | |
| ACN | 479440 |
| Time | |
| Date | 200007 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : den.airport |
| State Reference | CO |
| Altitude | msl bound lower : 13500 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : d01.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Do 328 TP (Turboprop) |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | arrival star : n/s |
| Flight Plan | VFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : d01.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 4500 flight time type : 2800 |
| ASRS Report | 479440 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence other other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | ATC Human Performance Company Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We started to descend from 15000 ft to 11000 ft. About 13500 ft, approach asked our altitude. We responded 13500 ft to 11000 ft. He said we were supposed to be at 15000 ft. He cleared us to 13000 ft. No conflicts, as far as we know. In the next few mins, we discovered we read a clearance for someone else in our company. The misunderstanding resolved in our number being abc while company back course was on same frequency. Company back course thought the call was for us too, and had remained at their altitude. It would help if flight numbers did not end in the same number.
Original NASA ASRS Text
Title: A DO328 FO RPTED THAT HE RESPONDED TO THE CLRNC FOR ANOTHER COMPANY ACFT WITH A SIMILAR SOUNDING CALL SIGN, WHICH CAUSED AN ALTDEV.
Narrative: WE STARTED TO DSND FROM 15000 FT TO 11000 FT. ABOUT 13500 FT, APCH ASKED OUR ALT. WE RESPONDED 13500 FT TO 11000 FT. HE SAID WE WERE SUPPOSED TO BE AT 15000 FT. HE CLRED US TO 13000 FT. NO CONFLICTS, AS FAR AS WE KNOW. IN THE NEXT FEW MINS, WE DISCOVERED WE READ A CLRNC FOR SOMEONE ELSE IN OUR COMPANY. THE MISUNDERSTANDING RESOLVED IN OUR NUMBER BEING ABC WHILE COMPANY BC WAS ON SAME FREQ. COMPANY BC THOUGHT THE CALL WAS FOR US TOO, AND HAD REMAINED AT THEIR ALT. IT WOULD HELP IF FLT NUMBERS DID NOT END IN THE SAME NUMBER.
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.