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TSN (Days)

TSN (Days)

Time Since New. Expressed in Calendar Days from new.

Note: Some computer systems default to counting TSN (Days) from the date of Installation if the Serial Number was unknown to the system. This may be in error if the Component, Engine, APU or Landing Gear was not new at installation. (Check the Authorised Release Certificate to confirm new or for statement of TSN (Days)

Note: Some Computer system may also display Calendar Months.

 

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  1. Lauren Partridge

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