Which of the following statements about the 'do not operate' tag is true?

• A. Could be ignored if the system seems minor.
• B. The tag indicates a hazardous condition or inoperative system; operation must not occur until corrected.
• C. It only applies to non-essential systems.
• D. It means routine maintenance is complete.

Answer: (B)

A Do Not Operate tag is a safety placard that signals a hazardous condition or an inoperative system and means that no use of that system or related functions is allowed until the issue is fixed. This protects you from attempting to operate equipment that could fail or cause a dangerous situation, and it ensures the fault gets addressed by authorized maintenance before any flight or التشغيل proceeds. The tag is placed by maintenance and remains in place until corrective action is completed and the system is verified serviceable. It can apply to any system, not just non-essential ones, and it is not cleared by routine maintenance completion or by simply assuming the issue is minor.