How are bleed air leaks detected and mitigated around the APU?

• A. Visual inspection only; no system checks required.
• B. Pressure/flow sensors detect leaks; validation through system checks; isolation valves and, if needed, APU shutdown and fire procedures.
• C. Bleed air leaks are not a concern for APU operations.
• D. Leaks are detected by smell only.

Answer: (B)