Is a Tail Rotor Control Failure exercise something that should never be done on an EC120. The Flight Manual certainly shows the technique in the emergency section - 3.6 for IGE/OGE and In Cruise Flight. It does not sya that you will get bitten because there are fenestron issues.
So if the CAA are pulling the ratings for three "naughty" people in Durban because they don't know enough about fenestron issues such as the aero D quirks that everyone is being led to believe are the problems then the BIG question still remains:
How do EC 120 drivers get the information from Eurocopter??? Surely they cannot simply call for everyone to have to do a full course. Surely they could sent out a simple communique along the lines of a Service Bulletin like the engineers get or like the Safety Notes Frank Robinson puts in his flight manual.
Surely the CAA should be tapping the guy at Eurocopter SA on the shoulder and saying "you are hereby instructed to issue the information in the interests of public safety". They certainly pulled the ratings " in the interests of public safety.
The other question that is left begging is - Are the CAA going to pull the ratings of all pilots in SA that did an in house non Eurocopter SA facilitated conversion - whether instructors or just pilot.