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Air carrier flight crew responded to clearance to descend. When level asked by center controller to say altitude. Informed they had accepted another flight's clearance. Same company, similar a/north.
| Attributes | |
| ACN | 148189 |
| Time | |
| Date | 199006 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : vld |
| State Reference | GA |
| Altitude | msl bound lower : 20000 msl bound upper : 21000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 225 flight time total : 4200 flight time type : 2200 |
| ASRS Report | 148189 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 11000 flight time type : 1000 |
| ASRS Report | 148353 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
I was performing first officer duties en route from atl to vld (PNF). I read back a clearance by ZJX on frequency 134.45 to descend and maintain FL200. After being level at FL200 for 1-2 mins, the controller said, 'cbg, I think you accepted your company's (flight cdg) clearance to FL200.' she then requested our altitude, which I read back as FL200. I confirmed with her that we did read back a clearance to FL200 with the call sign cbbg. She also had the other company flight read back his altitude. At the time it appeared that the controller was working 2 frequencys (I believe the other frequency was 132.3). A few mins later the controller gave us a descent to a lower altitude. There appeared to be no conflict of traffic. Both the captain and I were certain that we had heard the controller issue the clearance to FL200 for cbg, thus we were completely surprised when the controller informed us of the mistaken clearance.
Original NASA ASRS Text
Title: ACR FLT CREW RESPONDED TO CLRNC TO DESCEND. WHEN LEVEL ASKED BY CENTER CTLR TO SAY ALT. INFORMED THEY HAD ACCEPTED ANOTHER FLT'S CLRNC. SAME COMPANY, SIMILAR A/N.
Narrative: I WAS PERFORMING F/O DUTIES ENRTE FROM ATL TO VLD (PNF). I READ BACK A CLRNC BY ZJX ON FREQ 134.45 TO DSND AND MAINTAIN FL200. AFTER BEING LEVEL AT FL200 FOR 1-2 MINS, THE CTLR SAID, 'CBG, I THINK YOU ACCEPTED YOUR COMPANY'S (FLT CDG) CLRNC TO FL200.' SHE THEN REQUESTED OUR ALT, WHICH I READ BACK AS FL200. I CONFIRMED WITH HER THAT WE DID READ BACK A CLRNC TO FL200 WITH THE CALL SIGN CBBG. SHE ALSO HAD THE OTHER COMPANY FLT READ BACK HIS ALT. AT THE TIME IT APPEARED THAT THE CTLR WAS WORKING 2 FREQS (I BELIEVE THE OTHER FREQ WAS 132.3). A FEW MINS LATER THE CTLR GAVE US A DSNT TO A LOWER ALT. THERE APPEARED TO BE NO CONFLICT OF TFC. BOTH THE CAPT AND I WERE CERTAIN THAT WE HAD HEARD THE CTLR ISSUE THE CLRNC TO FL200 FOR CBG, THUS WE WERE COMPLETELY SURPRISED WHEN THE CTLR INFORMED US OF THE MISTAKEN CLRNC.
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.