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Flight crew of B737 operating in south american airspace responded to altitude clearance for another aircraft. Despite several xmissions in which they reiterated their flight number, control failed to recognize the error. Only discovered after the fact when controller noted their altitude display.
| Attributes | |
| ACN | 599639 |
| Time | |
| Date | 200311 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : veska |
| State Reference | FO |
| Altitude | msl bound lower : 31000 msl bound upper : 33000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : mdsd.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change cruise : level |
| Route In Use | enroute airway : a315.airway |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : mdsd.artcc |
| 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 |
| ASRS Report | 599639 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 599643 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Environmental Factor Flight Crew Human Performance ATC Human Performance Airspace Structure |
| Primary Problem | Environmental Factor |
| Air Traffic Incident | Operational Error |
Narrative:
Entering santo domingo airspace. FL310 at vesco intersection. ATC advised flight XXXX to climb to FL330. First officer and myself acknowledged the clearance and told ATC we were out of FL310 climbing to FL330. Out of FL310 again advised ATC we were climbing to FL330. Level at FL330 again told ATC we were level at FL330. 3-4 mins later, ATC asked our altitude which we said was FL330. He responded the climb clearance was for another flight who was also on frequency and did not acknowledge any of ATC's instructions, to the best of our knowledge. He told us to just maintain FL330 and he would descend us to FL310 prior to port-au-prince airspace. No other traffic was involved.
Original NASA ASRS Text
Title: FLT CREW OF B737 OPERATING IN SOUTH AMERICAN AIRSPACE RESPONDED TO ALT CLRNC FOR ANOTHER ACFT. DESPITE SEVERAL XMISSIONS IN WHICH THEY REITERATED THEIR FLT NUMBER, CTL FAILED TO RECOGNIZE THE ERROR. ONLY DISCOVERED AFTER THE FACT WHEN CTLR NOTED THEIR ALT DISPLAY.
Narrative: ENTERING SANTO DOMINGO AIRSPACE. FL310 AT VESCO INTXN. ATC ADVISED FLT XXXX TO CLB TO FL330. FO AND MYSELF ACKNOWLEDGED THE CLRNC AND TOLD ATC WE WERE OUT OF FL310 CLBING TO FL330. OUT OF FL310 AGAIN ADVISED ATC WE WERE CLBING TO FL330. LEVEL AT FL330 AGAIN TOLD ATC WE WERE LEVEL AT FL330. 3-4 MINS LATER, ATC ASKED OUR ALT WHICH WE SAID WAS FL330. HE RESPONDED THE CLB CLRNC WAS FOR ANOTHER FLT WHO WAS ALSO ON FREQ AND DID NOT ACKNOWLEDGE ANY OF ATC'S INSTRUCTIONS, TO THE BEST OF OUR KNOWLEDGE. HE TOLD US TO JUST MAINTAIN FL330 AND HE WOULD DSND US TO FL310 PRIOR TO PORT-AU-PRINCE AIRSPACE. NO OTHER TFC WAS INVOLVED.
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.