Narrative:

We departed ord westbound. It was a normal climb, through departure and center control. After some time passed, chicago center gave us 'climb and maintain FL230 heading 290 degree.' I read back climb and maintain FL230, heading 290 degree. Then I put 23000' in the altitude alert. After more time passed we called another chicago center frequency as instructed. I checked in at 20500' for FL230 290 degree heading. The controller said, your heading is 290 degree, I said, yes. Just as we leveled at FL230, the controller asked our altitude. I said, FL230. He said we are to maintain FL220. We went back to FL220. After we landed the captain called the chicago center supervisor. He said the 2 controllers are trnees and he was going to listen to the tapes and handle it internally. The next day the captain called him again. He said he listened to the tapes and the controllers did give us FL230 instead of FL22O and that they both missed our calls of FL230. He said they're going to handle it internally and no conflict or warning alert was set off, and for us to forget it. The factors here are for pilots and controllers to readback and acknowledge all xmissions.

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Original NASA ASRS Text

Title: ARTCC RADAR CTLR QUESTIONED ACR LGT ALT AT LEVEL OFF SAYING THEY WERE CLEARED TO FL220 BUT HAD CLIMBED TO FL230. TAPE REVIEW REVEALED THAT THE ACFT HAD BEEN CLEARED TO FL230 AND THAT TWO DEV CTLRS MISSED FLT CREW READBACK.

Narrative: WE DEPARTED ORD WBND. IT WAS A NORMAL CLB, THROUGH DEP AND CTR CTL. AFTER SOME TIME PASSED, CHICAGO CTR GAVE US 'CLB AND MAINTAIN FL230 HDG 290 DEG.' I READ BACK CLB AND MAINTAIN FL230, HDG 290 DEG. THEN I PUT 23000' IN THE ALT ALERT. AFTER MORE TIME PASSED WE CALLED ANOTHER CHICAGO CTR FREQ AS INSTRUCTED. I CHKED IN AT 20500' FOR FL230 290 DEG HDG. THE CTLR SAID, YOUR HDG IS 290 DEG, I SAID, YES. JUST AS WE LEVELED AT FL230, THE CTLR ASKED OUR ALT. I SAID, FL230. HE SAID WE ARE TO MAINTAIN FL220. WE WENT BACK TO FL220. AFTER WE LANDED THE CAPT CALLED THE CHICAGO CTR SUPVR. HE SAID THE 2 CTLRS ARE TRNEES AND HE WAS GOING TO LISTEN TO THE TAPES AND HANDLE IT INTERNALLY. THE NEXT DAY THE CAPT CALLED HIM AGAIN. HE SAID HE LISTENED TO THE TAPES AND THE CTLRS DID GIVE US FL230 INSTEAD OF FL22O AND THAT THEY BOTH MISSED OUR CALLS OF FL230. HE SAID THEY'RE GOING TO HANDLE IT INTERNALLY AND NO CONFLICT OR WARNING ALERT WAS SET OFF, AND FOR US TO FORGET IT. THE FACTORS HERE ARE FOR PLTS AND CTLRS TO READBACK AND ACKNOWLEDGE ALL XMISSIONS.

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.