How about letting the facts speak for themselves.
If one party is ignorant of the regulatory requirements then the report will serve to highlight the discrepancy and safety may well be maintained.
The reason why we have an ATSB/CASA is that reports can be made without the threat of intimidation.
Fundamentally if you have done nothing wrong then you have nothing to fear!
If the Saab operator is wrong then why not contact the C.P of the operator and discuss... strange things happen when people start communicating.