No, a mechanic with an Airframe rating can certify the static system after
it has been worked on. For a non-pressurized aircraft, the test involves
sucking the static system up 1,000 ft and making sure it doesn't leak more
that 100 fpm. If no work was performed on the transponder or blind encoder,
it doesn not require IFR recertification.

This would apply to a VFR aircraft only. If you open the system on an
IFR aircraft, the 91.411 required part 43 altimeter tests will have to
be done by a rated entity; an "A" rated mechanic is not one of them.
IFR or VFR aircraft, if the transponder integrated system is disturbed
so as to cause an error, the 91.413 Part 43 tests must be re-done by a
rated entity. Will opening a static line that includes the
transponder quailfy as that kind of disturbance? Most FAA PMI's I
have delt with think so.



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