Narrative:

Was IFR at 13000 ft over smf (just north) and most clouds were behind us (departed oak). Asked for lower and a visual approach. Somehow the controller's response was not very efficient considering I wanted to descend 'now' and go direct to myv for landing. So I canceled IFR and initiated a steep descent to set up for runway 14 (left downwind with a crosswind entry). The controller gave me a frequency change about 9 mi from the airport and I was about 7000 ft. I soon called my position on the myv CTAF, entered the pattern and landed. Everything was fine except for one thing -- I flew through beale's (4100-1600 ft) class C airspace while descending to my pattern altitude. I didn't even think about this, assuming the controller thought my descent profile was ok. On a flight from oak to myv 2 days later, the controller did the same thing. This time I requested to stay with him until below the class C at myv. He said not to worry about it because he had no other traffic in the beale class C airspace, then he had me contact myv CTAF, etc. Oh well! I had my boss in the right seat so I was a little nervous and trying to fly like I thought he would like, rather than just relax and exhibit my normally expert flying skills. I should have questioned the controller the first flight the way I did on the second. I had also flown into myv many times before in a C402 and been handed off the same way, but was much lower -- but come to think of it, I have done this error before. I assume the sacramento controllers don't mind not being in touch with certain flts as they fly through the edge of beale class C airspace towards myv.

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Original NASA ASRS Text

Title: A C425 PLT STARTED A DSCNT TOO SOON AND DSNDED THROUGH BAB CLASS C AIRSPACE WITHOUT BEING IN RADIO COM. THE PLT BECAME IMPATIENT WITH THE APCH CTLR AND CANCELED IFR AND STARTED DOWN WITHOUT COORDINATING ENTRY INTO BAB AIRSPACE.

Narrative: WAS IFR AT 13000 FT OVER SMF (JUST N) AND MOST CLOUDS WERE BEHIND US (DEPARTED OAK). ASKED FOR LOWER AND A VISUAL APCH. SOMEHOW THE CTLR'S RESPONSE WAS NOT VERY EFFICIENT CONSIDERING I WANTED TO DSND 'NOW' AND GO DIRECT TO MYV FOR LNDG. SO I CANCELED IFR AND INITIATED A STEEP DSCNT TO SET UP FOR RWY 14 (L DOWNWIND WITH A XWIND ENTRY). THE CTLR GAVE ME A FREQ CHANGE ABOUT 9 MI FROM THE ARPT AND I WAS ABOUT 7000 FT. I SOON CALLED MY POS ON THE MYV CTAF, ENTERED THE PATTERN AND LANDED. EVERYTHING WAS FINE EXCEPT FOR ONE THING -- I FLEW THROUGH BEALE'S (4100-1600 FT) CLASS C AIRSPACE WHILE DSNDING TO MY PATTERN ALT. I DIDN'T EVEN THINK ABOUT THIS, ASSUMING THE CTLR THOUGHT MY DSCNT PROFILE WAS OK. ON A FLT FROM OAK TO MYV 2 DAYS LATER, THE CTLR DID THE SAME THING. THIS TIME I REQUESTED TO STAY WITH HIM UNTIL BELOW THE CLASS C AT MYV. HE SAID NOT TO WORRY ABOUT IT BECAUSE HE HAD NO OTHER TFC IN THE BEALE CLASS C AIRSPACE, THEN HE HAD ME CONTACT MYV CTAF, ETC. OH WELL! I HAD MY BOSS IN THE R SEAT SO I WAS A LITTLE NERVOUS AND TRYING TO FLY LIKE I THOUGHT HE WOULD LIKE, RATHER THAN JUST RELAX AND EXHIBIT MY NORMALLY EXPERT FLYING SKILLS. I SHOULD HAVE QUESTIONED THE CTLR THE FIRST FLT THE WAY I DID ON THE SECOND. I HAD ALSO FLOWN INTO MYV MANY TIMES BEFORE IN A C402 AND BEEN HANDED OFF THE SAME WAY, BUT WAS MUCH LOWER -- BUT COME TO THINK OF IT, I HAVE DONE THIS ERROR BEFORE. I ASSUME THE SACRAMENTO CTLRS DON'T MIND NOT BEING IN TOUCH WITH CERTAIN FLTS AS THEY FLY THROUGH THE EDGE OF BEALE CLASS C AIRSPACE TOWARDS MYV.

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.