A few Rotorheads have been in touch asking for a copy of the old 212 Cat A Supplement. I've scanned it in three parts to keep the file size down, you can download them from here:
Part One
Part Two
Part Three
Please note, this is a scan of an old supplement which may have been superseded and may even be discontinued.
Not for operational use!
Each file is about 6mb, and there is a blue 'Download document' above the file reference.