The status symbol that indicates a fault or condition that makes the aircraft inop or unsafe to fly is which letter?

The status symbol that indicates a fault or condition that makes the aircraft inop or unsafe to fly is which letter?

• A. X
• B. Y
• C. Z
• D. Q

Answer: (A)

X is used to flag an aircraft as unairworthy due to a fault or condition that makes it unsafe to fly. When you see this symbol on the status or in maintenance records, it clearly tells maintenance and flight operations that the aircraft must be removed from service and repaired before it can be flown again. This symbol provides an immediate, unambiguous signal that flying is prohibited and that the proper corrective actions, inspections, and sign-offs are required before return to flight. The other letters don’t carry the same universal meaning of “do not fly”; they may indicate different statuses in some systems, but they do not communicate the prohibition as clearly as X.

X is used to flag an aircraft as unairworthy due to a fault or condition that makes it unsafe to fly. When you see this symbol on the status or in maintenance records, it clearly tells maintenance and flight operations that the aircraft must be removed from service and repaired before it can be flown again. This symbol provides an immediate, unambiguous signal that flying is prohibited and that the proper corrective actions, inspections, and sign-offs are required before return to flight. The other letters don’t carry the same universal meaning of “do not fly”; they may indicate different statuses in some systems, but they do not communicate the prohibition as clearly as X.