As an ex AN driver who now flies o/s, I can assure you AN did in the last 12 months fly the FCOM. There were minor variations, but these were very minor. Overall it was an excellent operation.
Before FCOM was introduced (phase in period of about 2 years) the AN procedures were built on 727/dc3 operations.
Introducing FCOM was the best thing that B.S did for the AN operation. As we had already operated FCOM it was a smooth transition for myself and several other AN guys when we did move into a differnt airline operation.