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 2

When a Part Number Serial Number's Installation Date precedes the Part Number Engineering Control's (P/N E/C) Effective Date, the P/N E/C Actuals will begin accumulating against flights taking place after the P/N E/C Effective Date not from the P/N Installation 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 example, create a Part Number Engineering Control (current date 01/12/2010) with a retroactive Effective Date (10/01/2009) and a preceding P/N Installation date (05/11/2009).

Notice the P/N S/N Install Date (05/11/2009).

Note: For more information regarding installing and removing parts refer to the A/C P/N Transaction via the Technical Records Training Manual.

Notice that the P/N E/C Effective Date (10/01/2009) takes place after the P/N S/N Install Date (above).

While the P/N S/N is installed, via the Inventory Detail, A/C tab notice that the A/C Installed times reflect the amount of time accumulated since the P/N was installed.

From the A/C Log Print, users can view the flight log breakdown for the Aircraft that the P/N was installed onto between the date the P/N was installed (05/11/2009) and the current date (01/12/2010). Notice how the A/C Total Times below reflect the A/C Installed Times above.

This P/N Installed Time does not however correspond to the P/N E/C Actuals. From the Inventory Detail, E/C tab, the Actuals accrued reflect the total times accumulated from the Effective Date of the P/N E/C not the P/N Installed date.

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.

From the A/C Log Print, users can view the flight log breakdown for the Aircraft that the P/N was installed onto between the P/N E/C Effective Date (10/01/2009) and the current date (01/12/2010). Notice how the A/C Total Times below reflect the P/N E/C Actuals above.