1-1 Topic Related Resource:
Maintenance Steering Group Task Force 1
Maintenance Steering Group 2
Process Oriented Maintenance
Maintenance Steering Group 3
Six Industry Working Groups;
-Structures
-Mechanical Systems
-Engine and Auxiliary Power Plant
-Electrical and Avionics System
-Flight Controls and Hydraulics
-Zonal; findings used to determine maintenance process for item called a 'bottom-up' approach - looked at components as the most likely cause of equipment malfunction
Maintenance Steering Group 2;
-MSG approach extremely successful
-747 references removed - could be used on all aircraft
-Renamed MSG2 used to develop scheduled maintenance/inspection program for 1970s aircraft
-MSG2 slightly different for 3 maintenance areas
-structures
-engines
-led to process oriented maintenance approach
Hard Time Process-
-requires item/component to be removed
-item is completely overhauled, partially overhauled or discarded before exceeding a specified interval
-interval can be calendar time, operating cycles, or flight hours
-ideal if component always fails at 'x' hours
-applied to components that have a direct adverse effect on safety of flight
-applied to components that have no possible maintenance check for reliability
On Condition Process-
-requires item to be periodically tested or inspected against a physical standard
-if component fails it must be overhauled or replaced
-must be restricted to components, equipment, or systems that can be tested or inspected without doing a tear-down inspection
-the OC checks are periodically scheduled
Examples; break wear indicator pins/control cables
Condition Monitor Requirements-
-item has no direct, adverse impact to safety of flight
-item must not have any 'hidden function'
-item must be included in the operators CM or reliability program
-items typically have no adverse relationship between age and reliability (lights/instruments)
Maintenance Steering Group 3-
-Airframe Systems Tasks
Lubrication
Servicing
Inspection
Functional Check
Operational Check
Visual Check
Restoration
Discard
Structural Item Tasks-
-Aircraft are subject to 3 sources or structural deterioration
Environmental deterioration - result of chemical interaction with environment (may be time dependant)
Accidental damage - caused by contact or impact
Fatigue damage - due to cyclic loading
-3 structural inspection techniques
General visual inspection - finds the obvious
Detailed inspection - used inspection aides like mirrors/lights
Special detailed inspection - NDI
Zonal-
-packages inspections into aircraft zones
-all systems, components, and installations within a zone receive surveillance to determine Security of installation and general condition