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B727-200 crew had a clearance readback and hearback problem when the crew descended with a clearance intended for another aircraft.
| Attributes | |
| ACN | 590414 |
| Time | |
| Date | 200308 |
| Day | Wed |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : zla.artcc |
| State Reference | CA |
| Altitude | msl bound lower : 30400 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 50 flight time total : 11200 flight time type : 550 |
| ASRS Report | 590414 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : published procedure non adherence : far |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued alert flight crew : returned to assigned altitude |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Ambiguous |
Narrative:
While approaching us airspace from mexico, by asuta intersection, we were given what we believed was a clearance to descend from FL310 to FL290. The clearance was read back to ATC, but another aircraft with a similar call sign was in the airspace. The clearance was read back and we initiated a descent to FL290. At FL306, ATC asked what we were doing. The captain informed him that we were descending to FL290. He replied 'negative, that was for air carrier Y.' the descent was aborted at FL304 and we climbed back to FL310.
Original NASA ASRS Text
Title: B727-200 CREW HAD A CLRNC READBACK AND HEARBACK PROB WHEN THE CREW DSNDED WITH A CLRNC INTENDED FOR ANOTHER ACFT.
Narrative: WHILE APCHING US AIRSPACE FROM MEXICO, BY ASUTA INTXN, WE WERE GIVEN WHAT WE BELIEVED WAS A CLRNC TO DSND FROM FL310 TO FL290. THE CLRNC WAS READ BACK TO ATC, BUT ANOTHER ACFT WITH A SIMILAR CALL SIGN WAS IN THE AIRSPACE. THE CLRNC WAS READ BACK AND WE INITIATED A DSCNT TO FL290. AT FL306, ATC ASKED WHAT WE WERE DOING. THE CAPT INFORMED HIM THAT WE WERE DSNDING TO FL290. HE REPLIED 'NEGATIVE, THAT WAS FOR ACR Y.' THE DSCNT WAS ABORTED AT FL304 AND WE CLBED BACK TO FL310.
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.