airspeed indicator problem after TT2 transponder install

On Mar 4, 3:47*pm, Don Johnstone wrote:

Man who teach me to fly he say, "Never ever blow in pitot, altimeters are
not designed to deal with being blown"

Are you sure that's what he said? How would blowing into a pitot have
any impact on the altimeter?

Applying pressure to pitot tubes is a standard method of testing
airspeed systems. You can buy quite expensive test equipment to do
just that. The same test equipment will also vary the static port
pressures although that's typically a suction.

For comparison testing of airspeed indicators, such as a mechanical
ASI and the Cambridge 302, one can either gently blow on the pitot and
gently suck on the static while observing the instrument readings. If
the mechanical ASI does not go off scale no harm can be done.

Andy