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MD80S flight crew acknowledged ATC clearance to descend to FL290 from assigned altitude FL330. ATC challenged flight crew when descending through FL310. Pilots advised controller he used their call sign. ATC reassigned FL330 without further discussion, and flight continued to destination.
| Attributes | |
| ACN | 388623 |
| Time | |
| Date | 199712 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : fsd |
| State Reference | SD |
| Altitude | msl bound lower : 31000 msl bound upper : 33000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| ASRS Report | 388730 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 388623 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : far non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course none taken : detected after the fact other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Cruising at FL330, ZMP told us to descend for traffic to FL290. The captain and I both heard our call sign clearly, and the captain acknowledged with our call sign and a readback of the descent instructions. No other aircraft was heard on the frequency. I started the descent from FL330 to FL290. Passing FL310, the ZMP controller said we should climb back to FL330, because the descent was for aircraft Y. I stopped the descent and climbed back to FL330. When asked if the descent created a problem, the controller said no. The flight continued uneventfully. As for the miscom, the captain and I are confident that we heard the controller correctly when he issued the descent instructions.
Original NASA ASRS Text
Title: MD80S FLC ACKNOWLEDGED ATC CLRNC TO DSND TO FL290 FROM ASSIGNED ALT FL330. ATC CHALLENGED FLC WHEN DSNDING THROUGH FL310. PLTS ADVISED CTLR HE USED THEIR CALL SIGN. ATC REASSIGNED FL330 WITHOUT FURTHER DISCUSSION, AND FLT CONTINUED TO DEST.
Narrative: CRUISING AT FL330, ZMP TOLD US TO DSND FOR TFC TO FL290. THE CAPT AND I BOTH HEARD OUR CALL SIGN CLRLY, AND THE CAPT ACKNOWLEDGED WITH OUR CALL SIGN AND A READBACK OF THE DSCNT INSTRUCTIONS. NO OTHER ACFT WAS HEARD ON THE FREQ. I STARTED THE DSCNT FROM FL330 TO FL290. PASSING FL310, THE ZMP CTLR SAID WE SHOULD CLB BACK TO FL330, BECAUSE THE DSCNT WAS FOR ACFT Y. I STOPPED THE DSCNT AND CLBED BACK TO FL330. WHEN ASKED IF THE DSCNT CREATED A PROB, THE CTLR SAID NO. THE FLT CONTINUED UNEVENTFULLY. AS FOR THE MISCOM, THE CAPT AND I ARE CONFIDENT THAT WE HEARD THE CTLR CORRECTLY WHEN HE ISSUED THE DSCNT INSTRUCTIONS.
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.