APU bleed plus electrical load maximum altitude (inflight/ground).

• A. 5,000 ft / 9,000 ft
• B. 32,000 ft / 40,000 ft
• C. 17,000 ft / 41,000 ft
• D. 10,000 ft / 14,000 ft

Answer: (D)

APU bleed air and electrical load share the APU’s limited power budget, so there’s a defined ceiling for using both together. For the P‑8A, you can run the APU bleed while supplying electrical load up to 10,000 ft when the airplane is in flight, and up to 14,000 ft when the airplane is on the ground. This keeps the APU from being overstressed while still meeting demand for bleed air and power. In flight, the APU must contend with other system loads and reduced margins at altitude, which lowers the permissible altitude for this configuration. On the ground, there are different load conditions, allowing a slightly higher limit. The other numbers aren’t consistent with the aircraft’s published limits, so the flight/ground values of 10,000 ft and 14,000 ft are the correct match.