What is the capacity of waste water storage on the aircraft in gallons?

What is the capacity of waste water storage on the aircraft in gallons?

• A. 4.2 gallons
• B. 6.4 gallons
• C. 8.0 gallons
• D. 9.2 gallons

Answer: (B)

Waste water storage capacity is the amount the lavatory waste tank can hold before it must be emptied. For this aircraft, the specification is 6.4 gallons, about 24 liters. This size balances the need to cover typical flight durations and passenger use with the desire to avoid extra weight and space, while still leaving a safe margin before servicing. A smaller tank would require more frequent drain operations, while a larger one would add unnecessary weight. The 6.4-gallon capacity reflects the design and maintenance data for this aircraft, making it the correct value.

Waste water storage capacity is the amount the lavatory waste tank can hold before it must be emptied. For this aircraft, the specification is 6.4 gallons, about 24 liters. This size balances the need to cover typical flight durations and passenger use with the desire to avoid extra weight and space, while still leaving a safe margin before servicing. A smaller tank would require more frequent drain operations, while a larger one would add unnecessary weight. The 6.4-gallon capacity reflects the design and maintenance data for this aircraft, making it the correct value.