Which document provides the guidelines for entering fuel tanks?

Which document provides the guidelines for entering fuel tanks?

• A. FAA Regulations 14 CFR
• B. Technical Manual 3-22
• C. Commandant Instruction M5100.47
• D. FAA Handbook 33

Answer: (C)

Entering fuel tanks is a safety-critical task that requires formal confined-space entry procedures and official authorization. Commandant Instruction M5100.47 provides the Coast Guard’s safety policies and step-by-step guidance for maintenance tasks, including entering aircraft fuel tanks. It covers the necessary elements such as entry permits, atmospheric testing, ventilation, personal protective equipment, continuous monitoring, fire protection, and rescue planning. This makes it the most appropriate and authoritative source for how to safely perform a fuel-tank entry. The other documents are broader or not specific to Coast Guard maintenance entry procedures: FAA regulations focus on overall airworthiness and operations, not the detailed inside-the-tank entry process; a Technical Manual might contain system-specific instructions but not the official safety framework for entering tanks; and an FAA maintenance handbook is general and not the Coast Guard's mandated safety procedure for this task.

Entering fuel tanks is a safety-critical task that requires formal confined-space entry procedures and official authorization. Commandant Instruction M5100.47 provides the Coast Guard’s safety policies and step-by-step guidance for maintenance tasks, including entering aircraft fuel tanks. It covers the necessary elements such as entry permits, atmospheric testing, ventilation, personal protective equipment, continuous monitoring, fire protection, and rescue planning. This makes it the most appropriate and authoritative source for how to safely perform a fuel-tank entry.

The other documents are broader or not specific to Coast Guard maintenance entry procedures: FAA regulations focus on overall airworthiness and operations, not the detailed inside-the-tank entry process; a Technical Manual might contain system-specific instructions but not the official safety framework for entering tanks; and an FAA maintenance handbook is general and not the Coast Guard's mandated safety procedure for this task.