Narrative:

Yesterday I was returning to oak after an uneventful day. I departed sjc and was 17 NM southeast of oak when I tried to reach bay on 135.4 for the routine arsa clearance. About 13 mi out I got my squawk and idented. This frequency is usually very busy and especially so during the cargo rush. On the frequency they had a trnee with a supervisor in the background. As I started to come up on hwd at 2500' I began to get concerned since I hadn't been verified in radar contact. Since the trnee was busy vectoring an light transport and a couple of other aircraft, I figured he had me on the scope but wanted to take care of more important things. This has happened a number of times. Suddenly bay will come in and say 'flight identification, radar contact, contact oak tower 118.3.' I didn't want to intrude into the busy frequency. While passing hwd I tried to get on but bay was too busy. Four mi from oak I got a word in and now bay hand't seen my squawk and I reidented and was told I had entered the arsa west/O a clearance and was given a number to the facility. I was following a routine pattern that bay had accepted many, many times. My suggestion for safety is to not put trnees on at the most critical time of the day.

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Original NASA ASRS Text

Title: GA SMA UNAUTH PENETRATION OF AIRSPACE OAK ARSA.

Narrative: YESTERDAY I WAS RETURNING TO OAK AFTER AN UNEVENTFUL DAY. I DEPARTED SJC AND WAS 17 NM SE OF OAK WHEN I TRIED TO REACH BAY ON 135.4 FOR THE ROUTINE ARSA CLRNC. ABOUT 13 MI OUT I GOT MY SQUAWK AND IDENTED. THIS FREQ IS USUALLY VERY BUSY AND ESPECIALLY SO DURING THE CARGO RUSH. ON THE FREQ THEY HAD A TRNEE WITH A SUPVR IN THE BACKGROUND. AS I STARTED TO COME UP ON HWD AT 2500' I BEGAN TO GET CONCERNED SINCE I HADN'T BEEN VERIFIED IN RADAR CONTACT. SINCE THE TRNEE WAS BUSY VECTORING AN LTT AND A COUPLE OF OTHER ACFT, I FIGURED HE HAD ME ON THE SCOPE BUT WANTED TO TAKE CARE OF MORE IMPORTANT THINGS. THIS HAS HAPPENED A NUMBER OF TIMES. SUDDENLY BAY WILL COME IN AND SAY 'FLT ID, RADAR CONTACT, CONTACT OAK TWR 118.3.' I DIDN'T WANT TO INTRUDE INTO THE BUSY FREQ. WHILE PASSING HWD I TRIED TO GET ON BUT BAY WAS TOO BUSY. FOUR MI FROM OAK I GOT A WORD IN AND NOW BAY HAND'T SEEN MY SQUAWK AND I REIDENTED AND WAS TOLD I HAD ENTERED THE ARSA W/O A CLRNC AND WAS GIVEN A NUMBER TO THE FAC. I WAS FOLLOWING A ROUTINE PATTERN THAT BAY HAD ACCEPTED MANY, MANY TIMES. MY SUGGESTION FOR SAFETY IS TO NOT PUT TRNEES ON AT THE MOST CRITICAL TIME OF THE DAY.

Data retrieved from NASA's ASRS site as of August 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.