Component work packages and replacement tasks

When you create task definitions for component maintenance, the choice you make for the Must Be Removed scheduling attribute works together with the LRU/SRU identity of the inventory's part group to determine how Maintenix automatically creates component work packages and the required replacement tasks to remove components from the higher-level inventory.

You can create component tasks and replacement tasks manually, but in this situation work packages are not created automatically and the component work packages must also be created manually.

Must Be Removed is a scheduling attribute of blocks and all requirement task definitions, except for replacement requirements. It does not apply to Job Instruction Cards. Within this sub-set of task definitions, the Must Be Removed drop-down list is only available when you create or edit the following task definitions:
  • Part number type task definitions with an ASSY, TRK, or SER inventory class. Do not use the Must Be Removed field for task definitions you create for kit part numbers.
  • Config slot type task definitions for TRK, or SUBASSY config slot
When you schedule requirements, you can specify whether a component must be removed for work to be done on it. You can specify the following values for the Must Be Removed attribute:
  • Off-wing: The component itself must be removed or detached from its highest assembly – the aircraft, or, if the component itself cannot be removed directly from the aircraft, the closest parent of the component that can be removed from the aircraft must be removed before the task is performed.
  • Off-parent: The component must be removed or detached from its immediate parent in the equipment hierarchy of the assembly before the task is performed. The Off Parent option is only available for:
    • Part number type task definitions with an ASSY, TRK, or SER inventory class.
    • Config slot type task definitions with a TRK config slots.
  • N/A: The component does not need to be removed. This is the default setting.

For tasks that can be completed when the component is installed, leave the Must Be Removed setting as N/A. If the setting is N/A, component work packages and replacement tasks are not automatically created. This gives you the option to complete a task while the component is still installed. If you decide to complete the work off-wing, you can use the Convert to Component Replacement button in Maintenix to create the component work package and replacement task.

If you select off-parent or off-wing, for components that belong to LRU or SRU part groups, then Maintenix automatically creates work packages and replacement tasks. The combination of the Must Be Removed attribute and the LRU/SRU part group label determine whether and how work packages and replacement tasks are automatically created.

When a task definition that specifies the component must be removed is initialized, Maintenix also assigns replacement requirements to work packages, or creates work packages when none exist. Maintenance planners can assign more tasks to any work package that Maintenix creates.

When an off-wing or off-parent task is initialized against a component, that component must be removed before you can start the task. When you install a component on an aircraft or assembly while the component has initialized off-wing or off-parent tasks against it, that component must be scheduled to be removed again, at a later date, before the tasks on the component can begin. Maintenix automatically creates the necessary replacement tasks to remove components, and packages tasks into new or existing work packages.

The automatic creation of work packages and replacement tasks does not apply to component tasks that are identified as Next Shop Visit tasks, nor does it apply to component tasks that are:
  • Created from a task definition that does not specify that the component must be removed off-wing or off parent.
  • Created without the use of a task definition. These are referred to as ad hoc component tasks.