From car 139, I don't understand when we should carry certificate of registration and the certificate of airworthiness.,
Usually I carry maintenance release and flight manual during my training

Anyone who know the answer. Thanks

Hi Dennis,

You can find the reference inside the Civil Aviation Regulations 1988; volume 3 (page 24-25).

Here is what the regulation states -

139 Documents to be carried in Australian aircraft
(1) Subject to subregulation (2), the pilot in command of an aircraft, when flying, must carry on the aircraft:
(a) its certificate of registration;
(b) its certificate of airworthiness;
(c) if Part 42 of CASR does not apply to the aircraft—unless CASA otherwise approves, its maintenance release and any other document approved for use as an alternative to the maintenance release for the purposes of a provision of these Regulations;
(d) unless CASA otherwise approves, the licences and medical certificates of the operating crew;
(e) the flight manual (if any) for the aircraft;
(f) any licence in force with respect to the radio equipment in the aircraft;
(g) if the aircraft is carrying passengers—a list of the names, places of embarkation and places of destination of the passengers;
(h) if the aircraft is carrying cargo—the bills of lading and manifests with respect to the cargo.

(2) An aircraft operating wholly within Australian territory is not required, when flying, to carry a document specified in paragraph (1)(a), (b), (f) or (g).

(3) An aircraft that is operated under an AOC need not carry its flight manual when flying if it carries on board an operations manual that:
(a) contains the information and instructions that are required, under the relevant airworthiness standards for the aircraft, to be included in the flight manual; and
(b) does not contain anything that conflicts with the information or instructions.

Regards,

Ryan T