How many lavatories are onboard the 777-300ER?

• A. 8
• B. 10
• C. 12
• D. 14

Answer: (C)

The main idea being tested is knowing the total number of lavatories on a specific wide-body configuration, which matters for crew planning and passenger comfort on long-haul flights. For American Airlines’ 777-300ER, the standard layout includes twelve lavatories in total. This count supports the large passenger capacity on a long-range aircraft, giving multiple lavatories across the cabin to minimize wait times and help maintain service flow. If the count were significantly lower, like eight or ten, it wouldn’t match the aircraft’s space and passenger load; if it were much higher, like fourteen, it would imply a different cabin setup than the standard AA configuration. So twelve is the figure that aligns with the typical 777-300ER layout used on long-haul routes.