Narrative:

I decided to review OTS (out of service) on [our online system log] for status of [program] mod evaluation visits at various stations.apparently this aircraft may not have been scheduled for evaluation of the [program] modification because [engineering order X] is not applicable to it.while the applicability status of this particular [engineering order] revision is true; I questioned what other [engineering order] revisions might apply to this aircraft.according to [the log; the inspection] was accomplished at ZZZ [many months prior].by the basic criteria applied to other aircraft; aircraft X may fit the criteria for evaluation of the [program] modification.review of the OTS history reports indicated that this aircraft has not had said evaluation complied with at any [company] maintenance station.if this condition is true; this aircraft needs to be evaluated in the same manner as all other aircraft that were modified at ZZZ are being inspected.apparently selection of the aircraft requiring evaluation of the [program] modification may have been based upon status of later [engineering order] revisions.[engineering order X] is an active revision.[engineering order] revisions [Y] and [Z] are marked as 'retired' and not viewable in the currently active [engineering order] search online.

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Original NASA ASRS Text

Title: Mechanic reported that aircraft may not have been evaluated as required due to confusing maintenance orders.

Narrative: I decided to review OTS (Out of Service) on [our online system log] for status of [Program] Mod Evaluation visits at various stations.Apparently this aircraft may not have been scheduled for evaluation of the [Program] Modification because [Engineering Order X] is not applicable to it.While the applicability status of this particular [Engineering Order] revision is true; I questioned what other [Engineering Order] revisions might apply to this aircraft.According to [the log; the inspection] was accomplished at ZZZ [many months prior].By the basic criteria applied to other aircraft; Aircraft X may fit the criteria for evaluation of the [Program] Modification.Review of the OTS History reports indicated that this aircraft has not had said evaluation complied with at any [company] maintenance station.If this condition is true; this aircraft needs to be evaluated in the same manner as all other aircraft that were modified at ZZZ are being inspected.Apparently selection of the aircraft requiring evaluation of the [Program] Modification may have been based upon status of later [Engineering Order] revisions.[Engineering Order X] is an active revision.[Engineering Order] revisions [Y] and [Z] are marked as 'retired' and not viewable in the Currently Active [Engineering Order] search online.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.