widgeon, yes it's made by ZF.
Svenestron,
as i believe you know some years ago a BO 105M (Army version) from ECD (MBB) killed the two persons onboard while chrashing due to a tail rotor gearbox failure. In the TRGB the oil level wasn't correct filled after maintenance work.
As i remember the crash occured within 15-20 min after take off.