TRAX MANUALS > Engineering > Engineering Module - E/C > Engineering E/C, Update Menu > Engineering Control > Engineering Control, Schedule Tab > Part Number Engineering Control Actuals Calculations > P/N E/C Actuals Calculation: Scenario 3

When a current Part Number Engineering Control (P/N E/C) has a retroactive Effective Date, P/N E/C Actuals will only be accumulated for the current Installation of the Part Number Serial Number regardless of the P/N S/N's historical Installs/Removals, if any.

Note: A P/N E/C is retroactive when its Effective Date precedes its Created Date.

Note: Please note the setting and functionality of switch AUTOECPNACTUAL. When set to Yes, the system will automatically update the Actual Hours and Cycles on all P/N S/Ns that are effective to a newly created/added P/N E/C. When set to No, the system will not automatically update the Actual Hours and Cycles on P/N S/Ns that are effective to a newly created/added P/N E/C.

For detailed information, refer to the following:

The following Part Number Engineering Control was created today (01/14/2010) but has a retroactive Effective Date (01/01/2002).

Notice the P/N E/C Created/implemented date (01/14/2010).

This P/N S/N had been Installed and Removed several times onto different Aircraft between the Effective Date (01/01/2002) and the Created Date (01/14/2010). As such, the P/N has accumulated a substantial amount of P/N Actual Times which is recorded on the Inventory Transaction/Inventory Detail/A/C P/N Transaction tab after the P/N is removed from each Aircraft. Notice the amount of Installed Hours and Cycles accrued against the P/N. (Hours Installed: 4272:57 + 2403:43 = 6676:40 ; Cycles: 2015 + 1070 = 3085).

Note: The above screenshot has been edited to display the A/C P/N Removals only.

At the time of the P/N E/C's creation, the P/N was, and still is, installed on an Aircraft. From the Inventory Detail, A/C tab, notice the amount of accumulated time against the current Install. (Installed Hours: 322:47 ; Cycles: 145)

Now, from the Inventory Detail, E/C tab, notice that the current amount of Actuals against the P/N E/C is the same as the amount of time accrued against the current A/C Installation and not the historical Install/Removals (as seen above). The P/N E/C Actuals reflect the current A/C Installed time because the P/N E/C Effective Date is retroactive (prior to the Installs in this example). Instead of the P/N E/C Actuals reflecting the historical Install/Removal times between the P/N E/C's Effective Date (01/01/2002) and its Created Date (01/14/2010), only the currently Installed times are accumulated. This is the correct TRAX functionality.

In this scenario, TRAX calculates the P/N E/C Actuals in this manner because TRAX has no way of verifying whether or not this retroactive P/N E/C had been previously complied with before being entered into TRAX. Therefore, the P/N E/C Actuals reflect only the current Installation of the part.

It is important to note that if the P/N E/C had not been complied with since the Effective Date or prior to the P/N's current aircraft Install, then the P/N E/C Actuals would need to be updated manually.

Note: Users should run the P/N Last Compliance Print via Engineering/Print/Engineering Control Print to check the P/N E/C Actuals for all effective parts before updating the P/N E/C Actuals manually.

To manually update the P/N E/C Actuals, refer to the following:

From the Engineering Control window, select the Engineering Control P/N button then then the Override button.

From the Engineering Effectivity Override window, select correct Serial Number then the Override button.

From the Engineering Effectivity Override pop-up window, enter the amount of Actuals accrued against the P/N E/C--not including the current Installation's times--then save. The Actuals entered below are the amount of historical Install/Removal Hours, Cycles and Days as taken from the Inventory Detail, A/C P/N Transaction tab (above).

These times will then be added to the Actuals against the current Install times and will appear against the P/N E/C via the Inventory Detail, E/C tab.

Note: Please note that APU Readings will only accumulate actuals from the date of P/N E/C Effectivity creation. Any historical readings will need to be manually added to the P/N Effectivity Actuals Override.