RAT 5: I can only speculate why some German MRO's use this system, perhaps because it is similar to what the Germans did prior to JAA66 and have failed to adopt the EASA common, and improved standards, whatever the reasons these Companies are now vigorously defending these practices and don't forget these are approved by the German LBA and so when these German MRO's operate in EU countries other than Germany, as they do, they remain under control of the LBA and therefore audited by the LBA not the NAA in which EU Country that particular facility is located in.