A + C,
The maintenance staff are not trained to "set up" the aircraft for flight and so CAN NOT be responsable (sic) for the switch positions of an aircraft that is offerd (sic) for service.
If the Helios Operations Manual (engineering) did not include a work schedule that
included returning the offending 'lever' to ON then I grant you, Helios are more culpable than the engineer that made the mistake but to claim maintenance staff are not responsible, is off the mark. They were part of the chain of error. The engineer in this instance has lived to carry some of that guilt but the crew haven't.
Engineers are not grease monkeys. They are responsible professionals who work to strict regimes that should include returning aircraft to service in a condition that is safe, functional and consistent. This is not about setting altimeters or programming FMC's is it?