"Dan Moos" wrote in message ...

Or not, but the only reason I can think that a brake problem would cause
that is if it (the brake)was stuck, since needing differential braking to
taxi a 152 is odd. A stuck brake pedal would make any sane CFI not risk a
take off. Stranger things have happened I suppose though.

I've had brakes on the 152 stick after screwing with the parking break
knob (which you are best advised not to monkey with). Perhaps the
instructor was just trying to clear the active taxiway and unjammed it
in the run-up block where he'd be out of the way.

Another failure (and I have this on the Navion because my toe brake
conversion uses Cessna rudder pedals), is that the hole in the tab where the brake
cylinder attaches wallows out and may eventually snap. At that point
the brake on that side gets to be intermittant as the thing engages and
disengages the end of the cylinder). Fortuantely, brakes in the Navion
are largely redundant and I woiuld have never put the toe brake conversion
in (it was already there). I've flown them fine with just the hand brake.

Absent understanding what he meant by "trouble with the left brake" you
can't really tell.