On Nov 25, 2:59*pm, (John Clear) wrote:

I've had a mode C failure inside the SFO Bravo surface area. *I
was northbound along 101 for the Bay Tour at 3500ft. *ATC let me
continue, but had me maintain 2000ft for my tour (normally, as long
as you stay outside the Bravo, they dont't care about your altitude).
After the tour, I was cleared through the Bravo again for the return
to PAO. *The only issue was PAO tower was a bit miffed that my mode
C was out, but NorCal didn't have a problem with it across several
controllers.

Was it a complete failure or reporting incorrectly and they had you
stop mode C?

Just curious to see if it was reporting incorrectly and lack of
knowlege on turning mode C off as it was in my situation, do you think
they would have cleared you through Bravo?