Can you take a generator or engine on a plane? By country

Generators and engines on flights in and from Japan

The rule for generators and engines comes from the Civil Aviation Bureau's list of restricted items and is the same on domestic and international flights.

Generators and engines: carry-on and checked baggage in Japan
Where	Allowed?	What applies
In the cabin	No	No. Engines and generators, internal combustion or fuel cell, cannot be carried on.
In checked baggage	Conditions	Only if the fuel tank has never held fuel or has been purged, the fuel system is completely empty, and it is sealed or capped.

Narita AirportNarita says items such as remote-controlled helicopters whose working parts contain hazardous substances are dangerous goods, while battery-driven toy trains (Plarail) can be brought onto the aircraft.Narita International Airport FAQ

Generators, engines and the fuel they once held

The engine row is about fuel that has been, or still is, inside the machine. A unit that has never held fuel and one with fuel left in it get different answers.

The fuel system is what the row regulates: Japan's row covers internal combustion engines and fuel cell engines, with engines and generators as its examples, and every one of its conditions concerns fuel: a tank never filled or since purged, a fuel system that is completely empty, and a system that is sealed or capped. The fuel itself has no such route: petrol, kerosene and diesel are refused in cabin and hold.
The same rule reaches chainsaws, mowers and trimmers: The lists that name equipment show how far the engine rule runs. The TSA's examples are chainsaws, generators and trimmers. Australia's CASA applies one set of conditions to petrol generators, chainsaws, lawn mowers, hedge trimmers and blowers, most of them under the heading machines with petrol powered engines.
The United States departs from the international rule: The TSA points out a difference of its own: although international regulations allow them in checked baggage, engines using fuels, internal combustion engines and fuel cell engines are not allowed in baggage in the United States unless totally purged of fuel and vapours. No amount of fuel may remain in the engine, residual vapours included.
Engine parts: For parts the TSA has a Car Parts entry: car engine parts without fuel or traces of fuel are allowed, and in checked bags only when packed in their original box and free of gasoline and oil. Japan's list has no row for parts. Its engine row applies the fuel conditions to the engine as a whole.

Generators and engines: the rule country by country

The carry-on answer for generators and engines is the same in all 3 other places we checked.

Generators and engines: carry-on and checked baggage rules by country
Flying from	Carry-on	Checked bag	What the authority says
JapanCivil Aviation Bureau	No	With limits	Engines and generators, internal combustion or fuel cell, cannot be carried on. Source
United StatesTSA	No	With limits	Not allowed in carry-on. Engine-powered equipment with residual fuel (e.g., chainsaws, generators) is not allowed in checked bags either. Engines completely purged of all fuel may be checked, but some airlines refuse them: check first.TSA entry: Engine-powered Equipment with Residual Fuel, Engines and Engine-powered Equipment Completely Purged of Fuel Source
TaiwanCivil Aviation Administration	No	With limits	Internal combustion engines and fuel cell engines may not go in hand baggage. They may be checked only if measures have been taken to eliminate the hazard (see Special Provision A70). Source
AustraliaHome Affairs, CASA	No	With limits	Petrol generators: not allowed in carry-on. Checked baggage only with airline approval, and only if the equipment has never contained fuel or the tank has been flushed and purged of vapours. Some airlines forbid them in passenger luggage.CASA Pack Right entry: Petrol generator Source

Each row comes from that authority's own page. Airlines can be stricter, and the screening officer has the final say.

If security in Japan will not let generators and engines through

What to do: A generator or engine can travel only as checked baggage, and only if it meets the fuel conditions above. Narita Airport states that anything given up at the checkpoint is discarded and cannot be returned.
If it gets on board: Taking an item that is restricted from the cabin onto an aircraft is punishable under Japan's Civil Aeronautics Act: up to 2 years' imprisonment or a fine of up to 1,000,000 yen.

Frequently asked questions

Can you take a generator or engine on a plane?

On flights in and from Japan: No. Engines and generators, internal combustion or fuel cell, cannot be carried on. In checked baggage: Only if the fuel tank has never held fuel or has been purged, the fuel system is completely empty, and it is sealed or capped.

Can you take a brand-new generator that has never held fuel on a plane?

Yes in checked baggage under Japan's list, never in the cabin. A tank that has never held fuel meets the first condition, and the fuel system must also be empty and sealed or capped. Australia's CASA uses the same test, equipment that has never contained any fuel, and requires airline approval. The TSA's answer for purged engines is to check with the airline.

Is a battery power station treated as a generator on a plane?

No. The generator row in Japan's list is about engines and their fuel systems. A unit that stores electricity in a lithium-ion battery to power other devices fits the list's definition of a power bank, and that row refuses anything over 160Wh in cabin and hold. Narita's FAQ makes a similar split for toys: a remote-controlled helicopter with hazardous substances in its operating parts is dangerous goods, while a Plarail train that runs on batteries can be brought on board.

Does the TSA allow a generator in carry-on bags?

Not allowed in carry-on. Engine-powered equipment with residual fuel (e.g., chainsaws, generators) is not allowed in checked bags either. Engines completely purged of all fuel may be checked, but some airlines refuse them: check first.

Can you put a generator in checked luggage?

Only if the fuel tank has never held fuel or has been purged, the fuel system is completely empty, and it is sealed or capped.

What is the rule for generators and engines on flights from Taiwan and Australia?

Taiwan: Internal combustion engines and fuel cell engines may not go in hand baggage. They may be checked only if measures have been taken to eliminate the hazard (see Special Provision A70). Australia: Petrol generators: not allowed in carry-on. Checked baggage only with airline approval, and only if the equipment has never contained fuel or the tank has been flushed and purged of vapours. Some airlines forbid them in passenger luggage.

Related items

Sources for this page

Japan Civil Aviation Bureau (MLIT) — Items restricted in carry-on and checked baggage (updated 24 April 2026)checked October 2, 2026
Narita International Airport — FAQ: prohibited itemschecked October 2, 2026
TSA — What Can I Bring?: Engine-powered Equipment with Residual Fuel + Engines and Engine-powered Equipment Completely Purged of Fuelchecked October 1, 2026
Taiwan CAA — Dangerous goods passengers and crew may carrychecked October 1, 2026
CASA — Pack Right: Petrol generatorchecked October 1, 2026