1940
Year
C-FMMJ — 1940 Piper J4AX
C-FMMJ is a 1940 Piper J4AX based in Winterland, Newfoundland and Labrador, listed on the Transport Canada Civil Aircraft Register (serial 4 1029X).
Piston single
Category
Newfoundland and Labrador
Based
1
On CA register
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Piper Cub (J-3, PA-11, PA-18 Super Cub) in Canada
- 3 for sale on MarketPlane now, asking $80,000–$208,000.
- Asking prices seen across Canada since August 2026: most between $75,000 and $145,000 (10 adverts, from $35,000 to $270,000).
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The aircraft
Year built1940 · 86 years old
Airframe typeWhether Transport Canada classes it as an aeroplane, a helicopter, a glider, a balloon or a gyroplane.Aeroplane
Engine typeHow the engine makes power. Piston engines run on avgas like a car engine; turboprops and jets burn turbine fuel, cost far more to overhaul, and are usually reserved for bigger or faster aircraft.Piston
Engines1
Max take-off weightMaximum take-off weight: the heaviest the aircraft may legally be when it starts its take-off roll, including fuel, people and baggage. It's the number that decides what licence and ratings you need, and what it costs to park.590 kg · 1,301 lb
Where it's based
BasedThe city or airport Transport Canada holds as the aircraft's base. Where the field holds a four-letter code like CYXE, that's the airport's ICAO identifier.Winterland, Newfoundland and Labrador
Transport Canada officeThe Transport Canada regional office that administers this registration. It follows the owner's address, so it isn't always the nearest office to where the aircraft actually sits.Moncton
Identity
Serial numberThe manufacturer's own number for this individual airframe, stamped on a plate. Unlike the registration, it never changes — it identifies the aircraft across every country it's ever been registered in.4 1029X
ManufacturerThe full legal name of the company that built it, which is often not the name on the tail. A Cessna 172 built in 2022 was made by Textron Aviation.Piper Aircraft Corp.
Built inWhere the aircraft was manufactured. Most of Canada's fleet was built in the United States.U.S.A.
ICAO 24-bit addressA unique 24-bit number your transponder broadcasts with every Mode S and ADS-B message — flight trackers key on it rather than the tail number. Canada's block runs C00000 to C3FFFF, which is why Canadian aircraft nearly all start C0 to C3. Transport Canada assigns it against the registration, so it changes if the aircraft is re-registered.C020F2
Registration
Registration typePrivate, Commercial or State. Commercial means the registration permits use for hire or reward — charter, flight training, aerial work. It describes the registration, not who owns the aircraft.Private
AirworthinessOwner-maintenance: a Canadian category letting the owner maintain the aircraft themselves without a licensed engineer signing the work off. Three things a buyer should know — it cannot be changed back to a standard Certificate of Airworthiness, it isn't recognised outside Canada, and it typically reduces resale value because it narrows the buyer pool.Special C of A - Owner-maintenance
Basis of registrationThe rule the aircraft is registered under. Most are registered against a type certificate, meaning they're a factory design approved by the regulator; amateur-built and ultralight aircraft come in under their own standards.CAR Standard 507.03(6) - Owner Maintenance Aircraft
Registered sinceWhen the current registration took effect. A recent date usually means the aircraft changed hands or was re-registered — it is not the date it was built.22 November 2017
Where C-FMMJ is, and how to track it
C-FMMJ transmits ADS-B under the 24-bit address C020F2. Trackers key on that address rather than the tail number, so it finds the aircraft even on flights flown under a different callsign. Transport Canada assigns the address against the registration, so it changes if the aircraft is re-registered.
Most private aircraft are on the ground most of the time — if a tracker shows nothing, it is very likely parked rather than missing.
How rare is C-FMMJ?
The Piper J4AX is very rare in Canada — there are 1 registered on the Transport Canada Civil Aircraft Register. It's part of the broader Piper Cub (J-3, PA-11, PA-18 Super Cub) family, with 890 registered in Canada — see fleet numbers, prices and what's for sale.
- Median year built in Canada's piston single category: 1976 — C-FMMJ is older than half of that fleet.
- One of 3,374 Piper aircraft on the Canadian register, across every model.
- One of 20,925 aircraft in Canada's piston single category, 89 of them in Newfoundland and Labrador.
- 2 aircraft are based in Winterland.
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Canadian Civil Aircraft Register, current to September 17, 2026. Aircraft data reproduced and distributed with the permission of the Government of Canada. MarketPlane.ca is not affiliated with Transport Canada.