Perform Due Calculation

Explanation

This activity is used to start one or several due calculations for a specific serial. The valid options to run are:

• Due calculation for interval maintenance tasks
• Due calculation for LLP (life limited part) tasks
• Due calculation for modifications tasks
• Recalculation of PMC (post maintenance check) tasks for fault and modifications
• Recalculation for fault deferrals

The due calculations can be run for the entire serial structure or just for the serial itself. There is also an option to run the calculations as a background job and this is recommended if the calculations are to be run for the entire structure.

Prerequisites

• The serial to be calculated, cannot have an operational status of Planned for Operation and it cannot be locked.
• An average operational value (per month) for the serial must exist.
• To run the due calculation for interval maintenance, an active maintenance program with a defined maintenance plan must exist.
• For life limited parts to be calculated, life limited information must be defined for the serial.
• For the modification due calculation to be run, an active modification must have been assigned to the serial.
• To run the calculation for PMC tasks, a fault or a modification must exist and a post maintenance check definition must have been set up for it. The fault or modification must have been completed and the serial must have reached the limit that triggers the post maintenance check.
• For the fault deferral calculation to run, a fault with fault deferral information enabled must exist for the serial. In addition, the fault deferral must have been approved.
   

System Effects

• Due calculations for the serial will be run to calculate due dates and values.
• Pending tasks will be created if the criteria for when a task is to be created is fulfilled.

Window

Serial Maintenance
Modification Details
Serial Operational Info
Flight Log
Component Life
Task Distribution
Task Distribution Components
Pending Tasks
Maintenance Order
Task Summary
Due Information per Task

Related Window Descriptions

Serial Maintenance
Modification Details/Assign Serials
Serial Operational Info
Flight Log
Component Life
Task Distribution
Task Distribution Components/Pending Tasks
Pending Tasks
Maintenance Order
Task Summary
Due Information per Task

Procedure

For all the windows listed above you can run the option to perform due calculations. The procedure described below is for the Serial Maintenance window, but a similar procedure can be performed from the other windows as well.

1. Open the Serial Maintenance window.
2. Query (F3) for the serial for which you will run the due calculations.
3. Right-click anywhere in the header of the window and then click Perform Due Calculation to open the Perform Due Calculation dialog box.
4. Select the calculations that should be performed for the serial by checking the options in the dialog.
5. If you want to perform the due calculations for all serials in the serial structure, select the Calculate Entire Structure check box.
6. To perform the due calculations as a background job, select the Run in Background check box.
7. Click OK.

When the due calculations are finished, you can view the calculated due dates and values for all types in the Serial Maintenance window besides for the fault deferrals. Fault deferrals can be viewed in the Serial Operational Info/Fault/Additional sub tab.