Feather #3
Yup, same thing. The canopy cover story even got a laugh in the Belgrano
cfiknow
The way things are headed if it isn't written in an approved document somewhere then you can't do it. For example do not use the familiar memory checklists if they are not in the Flight Manual. Have a memory lapse and forget something and you'll be hung for not using an approved document/procedure. Believe me this is the way FOI's are taught to audit
I'm not familiar with the Cessna Flight Manuals for your aircraft that you received the letter for, but I would be interested to know what they say about fuel management, especially ascertaining the quantity in tanks prior to departure. If you can show justification (authority) to use dipsticks made IAW a Cessna procedure then this needs to pursued.
Don't give up, CASA have abrigated any airworthiness and operational knowledge decisions to Cessna and the FAA, you'll get more sense out of those 2 any day.
Disco Stu