Checked a stack of CASRS and CAAPS and they don't say what any of you said........
They leave you dangling, which appears to be CASAs preferred position...
CAAP 42ZC:
Says that CASA exemption 13/13 allows us to fit unapproves products.
it does not.
What the CAAP DOES say is that a LAME must do the maintenance on any instrumetns required for IFR flight.
1 The exemption does not apply to:
(a) maintenance of aircraft instruments and equipment specifically required by CAR 1988 or the Civil Aviation Orders; or
(b) maintenance related to a condition of the special certificate of airworthiness or experimental certificate for the aircraft; or
(c) maintenance specified in an Airworthiness Directive or a direction issued by CASA applicable to the aircraft; or
(d) maintenance related to an instruction specified in the aircraft’s approved maintenance data.
http://www.saaa.com/Portals/0/PDFs/42zc_2.pdf