Narrative:

On with ZJX, climbing through FL260, we were given clearance to FL310. Read back 'climb to FL310.' through altitude FL294, we were asked to 'say altitude.' responded 'air carrier X is FL290 for FL310.' controller 'air carrier X, you were assigned FL280.' responded 'we read back climb to FL310, air carrier X.' controller 'descend immediately to FL290.' responded 'FL290, air carrier X.' we were advised later by ZTL of a 'possible pilot deviation' and given a number to call. Center controllers work too many frequencys and are not listening to readbacks! There is no need for the readback system if the controllers are too busy to listen.

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Original NASA ASRS Text

Title: A B727 FO RPTED THAT READBACK HEARBACK WAS INADEQUATE NEAR CTY, CAUSING A DISPUTED ALTDEV.

Narrative: ON WITH ZJX, CLBING THROUGH FL260, WE WERE GIVEN CLRNC TO FL310. READ BACK 'CLB TO FL310.' THROUGH ALT FL294, WE WERE ASKED TO 'SAY ALT.' RESPONDED 'ACR X IS FL290 FOR FL310.' CTLR 'ACR X, YOU WERE ASSIGNED FL280.' RESPONDED 'WE READ BACK CLB TO FL310, ACR X.' CTLR 'DSND IMMEDIATELY TO FL290.' RESPONDED 'FL290, ACR X.' WE WERE ADVISED LATER BY ZTL OF A 'POSSIBLE PLTDEV' AND GIVEN A NUMBER TO CALL. CTR CTLRS WORK TOO MANY FREQS AND ARE NOT LISTENING TO READBACKS! THERE IS NO NEED FOR THE READBACK SYS IF THE CTLRS ARE TOO BUSY TO LISTEN.

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.