What should be inspected on the APU exhaust area for safe operation?

• A. Exhaust outlet condition, flame/heat shielding, signs of leakage, mounting hardware integrity, and any foreign object debris.
• B. Only the exhaust color matters.
• C. The exhaust area requires no routine inspection.
• D. Only the mounting bolts should be checked.

Answer: (A)

Thorough inspection of the APU exhaust area must cover multiple aspects to prevent heat damage, leaks, and mechanical failure. The exhaust outlet condition matters because damage, corrosion, or obstructions can block flow and cause overheating or a fire risk. Flame and heat shielding must be intact to protect surrounding components and personnel from radiant heat. Signs of leakage are critical to detect fuel or exhaust escaping the system, which poses a major safety hazard. Mounting hardware integrity ensures the exhaust assembly stays securely attached; loose or damaged bolts can lead to misalignment, vibration, or detachment. Foreign object debris near the exhaust can be drawn in or heated, causing damage or fires. Therefore, a comprehensive check of all these areas is essential for safe operation. Relying on exhaust color alone is not reliable, routine inspection is necessary, and checking only mounting bolts misses other crucial hazards like leaks and debris.