Standard Airworthiness Certificate
A standard airworthiness certificate is an airworthiness certificate
Airworthiness certificate
A Certificate of Airworthiness , or an airworthiness certificate, is issued for an aircraft by the national aviation authority in the state in which the aircraft is registered. The airworthiness certificate attests that the aircraft is airworthy insofar as the aircraft conforms to its type design...

 issued for an aircraft
An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...

 by the national aviation authority
National aviation authority
The National Aviation Authority is the government statutory authority in each country that oversees the approval and regulation of civil aviation.-Role:...

 in the state in which the aircraft is registered. A standard airworthiness certificate is one of the certificates that are mandatory if an aircraft is to be used in commercial operations. In the USA, Australia and some other countries, a standard airworthiness certificate is issued in one of the following categories:
  • Transport
  • Commuter
  • Normal
  • Utility
  • Acrobatic
  • Manned free balloons
  • Special class of aircraft

The airworthiness certificate must be carried on board the aircraft and must be presented to a representative of the aviation authority upon request.

A standard airworthiness certificate remains valid as long as the aircraft meets its approved type design and is in a condition for safe operation. In the USA, a standard airworthiness certificate remains effective providing the maintenance, preventive maintenance and alterations are performed in accordance with relevant requirements and the aircraft remains registered in the USA.

A standard airworthiness certificate ceases to be valid when the aircraft ceases to be registered. Change of ownership of an aircraft does not require re-issue or re-validation of that aircraft’s standard airworthiness certificate.

In contrast to a standard airworthiness certificate, an aircraft may be issued with a special airworthiness certificate
Special Airworthiness Certificate
A special airworthiness certificate is an airworthiness certificate that is not sufficient to allow an aircraft to be used in commercial passenger or cargo operations.-United States:...

. Examples of aircraft which are not eligible for standard airworthiness certificates but may be eligible for special airworthiness certificates include agricultural aircraft, experimental aircraft, and some ex-military aircraft.
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