JT,
By whom: A team headed by the principle of Southdown Engineering, a well known (then) CAR 35 engineer with substantial light aircraft certification experience, including test flight approval.
Most of the major leg work was done by CASA staff seconded to the CASA Review program office.
OTT: Not really, and we were most surprised, as we expected exactly the opposite ---- give that the "Australian" surface conditions were, as I recall, "short dry grass", not a sealed surface.
We came to the conclusion that a lot of OEM and local "test flying" was pretty rough and ready. Where we found variances, there was no real pattern just differences.
That was also when we discovered that the Chipmunk had never been "properly" certified in Australia.
Unlike the UK., C.of As were just issued to airframes in ex-military condition ---- but not in accord with the ANR/ANOs that applied at the time ----- a good thing, and we had not spent lots of money on meaningless "civil modifications" ---- a significant, (if unintended oversight) variation to DCA at al practice pre 1998.
Tootle pip!!