Narrative:

I departed san francisco. I was conducting a part 91 flight in connection with my company's business. I took off on runway 28R. My clearance was to sacramento via the san francisco 8 departure, maintain 10000 ft. Prior to takeoff, altitude was changed to 3000 ft. After takeoff, I was asked to contact departure and was given a right turn to 030 degrees. I changed frequencys, called norcal departure and confirmed I was out of 1400 ft for 3000 ft and in a right turn to 030 degrees. This instruction did not appear abnormal in that 10 days prior, I had received the same right turn instruction on this departure. ATC told me that I was not given a turn to 030 degrees and was told to turn left to 350 degrees and to climb to 11000 ft. ATC asked me to contact them when I landed. I believe that my radio malfunctioned on departure or that I was stepped on by another transmission. I had a prior problem with this radio 2 weeks earlier, but it was intermittent and resumed normal function afterward and did not seem serious enough to ground the aircraft. I did not miss any instructions, however, I did -- out of an abundance of caution -- contact the service center. I scheduled an appointment to have the radio checked. The radio had been in the aircraft for approximately 35 trouble-free hours. The intermittent problem I experienced 2 weeks ago appeared to be an anomaly. When the misunderstanding with ATC took place, I landed and had the service center replace the radio. It is my strong recommendation that ATC not notify a pilot while he is still flying that upon landing he should make a phone call to ATC. This causes serious distrs and takes a pilot's attention away from the job of aviating, navigating, and communicating. After landing the pilot should be notified, not before.

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Original NASA ASRS Text

Title: C525 PIC MISINTERPS NCT ALT VERIFICATION CLRNC AS A TURN CLRNC RESULTING IN A TURN BELOW THE MVA OFF THE RWY 28 SFO 8 SID.

Narrative: I DEPARTED SAN FRANCISCO. I WAS CONDUCTING A PART 91 FLT IN CONNECTION WITH MY COMPANY'S BUSINESS. I TOOK OFF ON RWY 28R. MY CLRNC WAS TO SACRAMENTO VIA THE SAN FRANCISCO 8 DEP, MAINTAIN 10000 FT. PRIOR TO TKOF, ALT WAS CHANGED TO 3000 FT. AFTER TKOF, I WAS ASKED TO CONTACT DEP AND WAS GIVEN A R TURN TO 030 DEGS. I CHANGED FREQS, CALLED NORCAL DEP AND CONFIRMED I WAS OUT OF 1400 FT FOR 3000 FT AND IN A R TURN TO 030 DEGS. THIS INSTRUCTION DID NOT APPEAR ABNORMAL IN THAT 10 DAYS PRIOR, I HAD RECEIVED THE SAME R TURN INSTRUCTION ON THIS DEP. ATC TOLD ME THAT I WAS NOT GIVEN A TURN TO 030 DEGS AND WAS TOLD TO TURN L TO 350 DEGS AND TO CLB TO 11000 FT. ATC ASKED ME TO CONTACT THEM WHEN I LANDED. I BELIEVE THAT MY RADIO MALFUNCTIONED ON DEP OR THAT I WAS STEPPED ON BY ANOTHER XMISSION. I HAD A PRIOR PROB WITH THIS RADIO 2 WKS EARLIER, BUT IT WAS INTERMITTENT AND RESUMED NORMAL FUNCTION AFTERWARD AND DID NOT SEEM SERIOUS ENOUGH TO GND THE ACFT. I DID NOT MISS ANY INSTRUCTIONS, HOWEVER, I DID -- OUT OF AN ABUNDANCE OF CAUTION -- CONTACT THE SVC CTR. I SCHEDULED AN APPOINTMENT TO HAVE THE RADIO CHKED. THE RADIO HAD BEEN IN THE ACFT FOR APPROX 35 TROUBLE-FREE HRS. THE INTERMITTENT PROB I EXPERIENCED 2 WKS AGO APPEARED TO BE AN ANOMALY. WHEN THE MISUNDERSTANDING WITH ATC TOOK PLACE, I LANDED AND HAD THE SVC CTR REPLACE THE RADIO. IT IS MY STRONG RECOMMENDATION THAT ATC NOT NOTIFY A PLT WHILE HE IS STILL FLYING THAT UPON LNDG HE SHOULD MAKE A PHONE CALL TO ATC. THIS CAUSES SERIOUS DISTRS AND TAKES A PLT'S ATTN AWAY FROM THE JOB OF AVIATING, NAVING, AND COMMUNICATING. AFTER LNDG THE PLT SHOULD BE NOTIFIED, NOT BEFORE.

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.