When determining the empty weight of an aircraft certificated under current airworthiness standards (14 CFR Part 23), the oil contained in the supply tank is considered....

When determining the empty weight of an aircraft certificated under current airworthiness standards (14 CFR Part 23), the oil contained in the supply tank is considered....

• A. A part of the empty weight.
• B. A separate item.
• C. Contingency reserve.
• D. Not included.

Answer: (A)

Empty weight includes all permanently installed equipment and the fluids needed for normal operation that remain with the aeroplane. The oil in the supply tank is part of the lubrication system and is fixed to the aircraft, so it is counted as part of the empty weight rather than as a separate item or as fuel or payload. In other words, it stays with the aircraft and contributes to its baseline weight, which is why the correct choice is that it’s part of the empty weight.