Hello!
But operators with an AOC ar the safest operators FACT.
The CAA say it is so.
???
I fail to see the connection of your statement with this interim report.
But had they been operating on an AOC, there would have been some minimal common training/operating standards and some very basic operating procedures at least. Whether or not the crews adhere to those is something completely different of course. Like flight preparation (Egelsbach really is an airfield that one has to familiarise himself with _before_ flying there at night in marginal weather) stability criteria for continuing the final approach or reaction to GPWS warnings: The power settings for both engines remained at 34% (idle?) after they had heard first "SINKRATE PULL UP" and then "TOO LOW TERRAIN". (BTW: The timeline given in the interim report regarding the GPWS warnings does not make sense.)