Narrative:

On descent into stl on qball arrival, there was confusion as to whether we were to cross qball intersection at 11000 ft or 15000 ft. Though not depicted on arrival chart, new fuel conservation procedures have lndgs for runways 12 left and right crossing at 15000 ft instead of 11000 ft. We descended to 11000 ft as we thought we were cleared. ZKC queried us as to our altitude, indicating we were cleared to 15000 ft. Arrival chart should encompass these recent changes.

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Original NASA ASRS Text

Title: ALT DEV ON STAR.

Narrative: ON DSCNT INTO STL ON QBALL ARR, THERE WAS CONFUSION AS TO WHETHER WE WERE TO CROSS QBALL INTXN AT 11000 FT OR 15000 FT. THOUGH NOT DEPICTED ON ARR CHART, NEW FUEL CONSERVATION PROCS HAVE LNDGS FOR RWYS 12 L AND R XING AT 15000 FT INSTEAD OF 11000 FT. WE DSNDED TO 11000 FT AS WE THOUGHT WE WERE CLRED. ZKC QUERIED US AS TO OUR ALT, INDICATING WE WERE CLRED TO 15000 FT. ARR CHART SHOULD ENCOMPASS THESE RECENT CHANGES.

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.