A notice of escapement (NOE) is the letter sent when

• A. It is used to obtain objective evidence to confirm that requirements have been fulfilled
• B. Verification has occurred
• C. A defective part has been sent to the airline customer
• D. Acceptance has been granted

Answer: (C)

A notice of escapement is the formal communication that goes to the customer when a defective part has left the internal QA process and been shipped to the airline customer. It signals that a defect escaped detection and reached the field, so containment actions, corrective actions, and root-cause investigation are triggered, and the customer can take appropriate action on their side.

This is why the option describing a defective part sent to the airline customer is the best fit: it matches the essence of an escape event—notification that a defect has escaped internal checks and was delivered to the customer. The other statements refer to activities like gathering objective evidence to show requirements were met, confirming verification, or indicating acceptance, which are different steps in the QA workflow and do not describe the purpose of an escapement notice.