Narrative:

After departing cmh we were level at 10000 ft indicating 320 KTS when the controller issued a heading of 240 degrees reduce airspeed to 260 KTS and climb to FL260 which was our filed altitude for cruising to ord. I acknowledged with a readback of heading, altitude, and airspeed. I also set the altitude in the altitude controller window and the PF complied with the controller's instructions. As we were climbing through FL230 the controller issued a frequency change from 124.8 to frequency 125.07. On the new frequency of 125.07 I checked on as climbing out of 23500 to 26000 ft. The controller acknowledged with instructions to descend to FL230. We immediately complied. We were then advised that this was an altitude bust but was not a traffic conflict. I returned to 124.8 on the other radio to talk to the previous controller about the situation but was given a 'no comment'. In the future when I am issued a clearance above FL230 by a low altitude controller I will clarify the clearance. Also, I think that when multiple instructions are issued in one clearance at one given time sets up pilots and controllers for mistakes which we can ill afford in today's modern aviation environment.

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Original NASA ASRS Text

Title: FLC OF MLG UNDERSTOOD CLRED TO FL260. NEXT CTLR STATED 230. FLT HAD OVERSHOT TO 23500.

Narrative: AFTER DEPARTING CMH WE WERE LEVEL AT 10000 FT INDICATING 320 KTS WHEN THE CTLR ISSUED A HDG OF 240 DEGS REDUCE AIRSPD TO 260 KTS AND CLB TO FL260 WHICH WAS OUR FILED ALT FOR CRUISING TO ORD. I ACKNOWLEDGED WITH A READBACK OF HDG, ALT, AND AIRSPD. I ALSO SET THE ALT IN THE ALT CTLR WINDOW AND THE PF COMPLIED WITH THE CTLR'S INSTRUCTIONS. AS WE WERE CLBING THROUGH FL230 THE CTLR ISSUED A FREQ CHANGE FROM 124.8 TO FREQ 125.07. ON THE NEW FREQ OF 125.07 I CHKED ON AS CLBING OUT OF 23500 TO 26000 FT. THE CTLR ACKNOWLEDGED WITH INSTRUCTIONS TO DSND TO FL230. WE IMMEDIATELY COMPLIED. WE WERE THEN ADVISED THAT THIS WAS AN ALT BUST BUT WAS NOT A TFC CONFLICT. I RETURNED TO 124.8 ON THE OTHER RADIO TO TALK TO THE PREVIOUS CTLR ABOUT THE SITUATION BUT WAS GIVEN A 'NO COMMENT'. IN THE FUTURE WHEN I AM ISSUED A CLRNC ABOVE FL230 BY A LOW ALT CTLR I WILL CLARIFY THE CLRNC. ALSO, I THINK THAT WHEN MULTIPLE INSTRUCTIONS ARE ISSUED IN ONE CLRNC AT ONE GIVEN TIME SETS UP PLTS AND CTLRS FOR MISTAKES WHICH WE CAN ILL AFFORD IN TODAY'S MODERN AVIATION ENVIRONMENT.

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.