Who of the following can legally void an inspection stamp?

• A. The plant manager
• B. The FAA inspector
• C. The customer
• D. The supervisor of the inspector who stamped it

Answer: (D)

The key idea is who holds the authority to revoke a certification that an inspection stamp represents. A stamping authority is assigned to the inspector who performs the inspection, but the power to withdraw or void that stamp sits with the supervisor who oversees that inspector. This supervisor has the proper line-of-authority to review the work, ensure it meets all requirements, and take corrective action if needed. The plant manager doesn’t have direct authority to cancel a stamped certification, and the customer has no role in revoking internal certifications. A regulator like the FAA is external to the plant’s internal control and wouldn’t typically void an internal stamp; they would require corrective action or take enforcement as appropriate. So the person in the supervisory chain who oversees the inspector is the appropriate and legally supported one to void the stamp.