Routine Maintenance 5.2 Maintenance Chart daily E 20 Daily check 50 Bh E 10 After commissioning and E50, E60, E70 500 Bh E 30 Inspection 1000 Bh E 40 Extended inspection 3000 Bh E 50 Intermediate overhaul 6 000 Bh E 60 Extended intermediate overhaul 12 000 Bh E 70 Major overhaul Intervals Maintenance Stages 5.2.1 Additional maintenance at/after © 2002 5 Intervals at/after Maintenance Stages Execution 50 Bh E 10 After commissioning and E50, E60, E70 authorized trained staff daily E 20 Daily check routine operator, authorized trained staff 500 Bh E 30 Inspection authorized trained staff 1000 Bh E 40 Extended inspection authorized trained staff 3000 Bh E 50 Intermediate overhaul authorized trained staff 6 000 Bh E 60 Extended intermediate overhaul authorized trained staff 12 000 Bh E 70 Major overhaul authorized trained staff