Narrative:

On IFR flight plan from 2a0 to sus on oct/xa/97 at approximately AB00. As PIC I was instructed by ZKC to descend from FL230 to cross 10 mi east of glass intersection at 12000 ft. On descent I encountered rime icing from FL190 to 13000 ft and gave ZKC a PIREP while also listening to sus ATIS. ZKC switched me to stl approach. In descent, the altitude preselect was set to 11000 ft either inadvertently or assigned. On initial call to stl approach I requested lower while still in descent to get into VMC. The icing, time to give PIREP and answer passenger questions diverted my attention. Some xmissions to and from ZKC by me and other aircraft were blocked. Stl responded by asking altitude and I responded by stating, '11000 ft, request lower, I have the spirit of st louis ATIS.' stl approach asked who assigned 11000 ft and I answered ZKC. I stated I wouldn't have set in 11000 ft if it wasn't assigned, and that I hope I didn't mess up. Stl approach did not act concerned, no heading or immediate altitude changes wre ordered and he did not confirm I was not assigned 11000 ft. No other aircraft were involved and I was not in the class B. With all the other conversations going on I don't know if I was not assigned 11000 ft but his initial question concerned me that I may have inadvertently descended through an assigned altitude.

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Original NASA ASRS Text

Title: A CESSNA CONQUEST CPR PLT OVERSHOOTS HIS ASSIGNED ALT AND FAILS TO MAKE A XING RESTR. CITES WX, ICING, COM PROBS AND PAX DISTR. HE HAD MISSET HIS ALT ALERTER FOR THE WRONG ALT.

Narrative: ON IFR FLT PLAN FROM 2A0 TO SUS ON OCT/XA/97 AT APPROX AB00. AS PIC I WAS INSTRUCTED BY ZKC TO DSND FROM FL230 TO CROSS 10 MI E OF GLASS INTXN AT 12000 FT. ON DSCNT I ENCOUNTERED RIME ICING FROM FL190 TO 13000 FT AND GAVE ZKC A PIREP WHILE ALSO LISTENING TO SUS ATIS. ZKC SWITCHED ME TO STL APCH. IN DSCNT, THE ALT PRESELECT WAS SET TO 11000 FT EITHER INADVERTENTLY OR ASSIGNED. ON INITIAL CALL TO STL APCH I REQUESTED LOWER WHILE STILL IN DSCNT TO GET INTO VMC. THE ICING, TIME TO GIVE PIREP AND ANSWER PAX QUESTIONS DIVERTED MY ATTN. SOME XMISSIONS TO AND FROM ZKC BY ME AND OTHER ACFT WERE BLOCKED. STL RESPONDED BY ASKING ALT AND I RESPONDED BY STATING, '11000 FT, REQUEST LOWER, I HAVE THE SPIRIT OF ST LOUIS ATIS.' STL APCH ASKED WHO ASSIGNED 11000 FT AND I ANSWERED ZKC. I STATED I WOULDN'T HAVE SET IN 11000 FT IF IT WASN'T ASSIGNED, AND THAT I HOPE I DIDN'T MESS UP. STL APCH DID NOT ACT CONCERNED, NO HDG OR IMMEDIATE ALT CHANGES WRE ORDERED AND HE DID NOT CONFIRM I WAS NOT ASSIGNED 11000 FT. NO OTHER ACFT WERE INVOLVED AND I WAS NOT IN THE CLASS B. WITH ALL THE OTHER CONVERSATIONS GOING ON I DON'T KNOW IF I WAS NOT ASSIGNED 11000 FT BUT HIS INITIAL QUESTION CONCERNED ME THAT I MAY HAVE INADVERTENTLY DSNDED THROUGH AN ASSIGNED ALT.

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.