Does the APU have its own fire extinguisher?

Does the APU have its own fire extinguisher?

• A. Yes.
• B. No.
• C. Only shared with engines.
• D. Not specified.

Answer: (A)

APUs pose a separate fire risk from the engines, so they have their own fire extinguisher system. The APU compartment can overheat or ignite independently of the main engines, and having a dedicated fire bottle allows rapid, localized suppression without relying on engine extinguishing or external systems. This independent capability is standard on most aircraft to ensure the APU can be shut down safely and fires controlled quickly. The other options imply there isn’t a dedicated extinguisher or that it’s shared, which doesn’t align with typical safety design for protecting the APU area.

APUs pose a separate fire risk from the engines, so they have their own fire extinguisher system. The APU compartment can overheat or ignite independently of the main engines, and having a dedicated fire bottle allows rapid, localized suppression without relying on engine extinguishing or external systems. This independent capability is standard on most aircraft to ensure the APU can be shut down safely and fires controlled quickly. The other options imply there isn’t a dedicated extinguisher or that it’s shared, which doesn’t align with typical safety design for protecting the APU area.