What is the purpose of a "Do Not Install" tag?

• A. To prevent use of a nonconforming item until disposition is completed
• B. To indicate routine maintenance only
• C. To verify product expiration date
• D. To flag items for QA review only

Answer: (B)

The Do Not Install tag is used to stop any attempt to install an item that does not meet requirements until an official disposition decision has been made. By placing this tag on the item or its container, you communicate clearly that installation is prohibited, protecting safety, airworthiness, and compliance. This tag keeps the item out of service while it’s reviewed—whether it will be repaired, returned, scrapped, or otherwise dispositioned—so there’s no risk of it being used in aircraft or systems.

This isn’t about routine maintenance, which uses normal maintenance procedures and documentation. It also isn’t a tag or label used merely to verify an expiration date, since expiration checks are handled through other controls. And it isn’t simply for QA review; it specifically communicates an installation prohibition until a disposition is completed.