Which of the following is NOT a reason why quality status list (QSL) information may not be available? (Select three that apply)

Quality Status List (QSL) information may not be available for several valid reasons, but considering the choice indicating that an item is "under surveillance" is not one of those reasons is correct. When an item is under surveillance, it usually implies that it is being closely monitored for quality assurance, and there may be ongoing evaluations or inspections taking place. This monitoring helps ensure that critical information regarding the item's quality status is accessible rather than preventing it from being available.

In contrast, items sent for testing typically do not have their QSL information readily available because they are undergoing evaluations. Additionally, when only visual inspections are required, the information may also be limited if no comprehensive testing data exists. Lastly, if test results have not been entered into the QSL, it would directly affect the availability of the quality status for that item.

Therefore, while surveillance indicates a proactive approach to quality, it does not restrict access to pertinent QSL information, making it the correct choice for this question.