Document ID: chunk:federal_register_of_legislation:F2024C01027:reg:15:p110
Version: federal_register_of_legislation:F2024C01027
Segment Type: reg
Provision Reference: reg 15 (pt 110/182)
Character Range: 428063–431064

a supplemental type certificate for the approval of the design of a major change to a type certificated aircraft, aircraft engine or propeller—see Subpart 21.E.

21.414  Determination of additional airworthiness standards—special conditions
 (1) This regulation applies if CASA or the authorised person or approved design organisation is not satisfied that the proposed airworthiness standards for the design provide an adequate safety standard for the design in a particular respect.
Example: The modification or repair has a novel or unusual design feature.
 (2) CASA or the authorised person or approved design organisation may determine additional airworthiness standards for the design.
Note: An additional airworthiness standard imposed in respect of a design is often called a 'special condition'.
 (3) The additional airworthiness standards must be appropriate to provide a level of safety for the aircraft, aircraft engine, propeller or appliance equivalent to the level of safety required by these Regulations for a comparable aircraft, aircraft engine, propeller or appliance.
 (4) CASA or the authorised person or approved design organisation must notify the applicant, in writing, of the determination.

21.416  Determination of non‑application of airworthiness standards—application to CASA
 (1) This regulation applies to the design if:
 (a) the application is made to CASA; and
 (b) the design is for a modification of, or repair to:
 (i) an aircraft that is type certificated in the restricted category; or
 (ii) an aircraft mentioned in subregulation 21.185(3A); and
 (c) CASA is satisfied that a proposed airworthiness standard for the design is inappropriate for the purpose for which the aircraft is to be used.
 (2) CASA may determine that the airworthiness standard does not apply to the design.
 (3) CASA must give the applicant written notice of the determination.

21.418  Determination of non‑application of airworthiness standards—application to authorised person or approved design organisation
 (1) This regulation applies to the design if:
 (a) the application is made to an authorised person or approved design organisation; and
 (b) the design is for a modification of or repair to:
 (i) an aircraft that is type certificated in the restricted category; or
 (ii) an aircraft mentioned in subregulation 21.185(3A); and
 (c) the authorised person or approved design organisation is satisfied that a proposed airworthiness standard for the design is inappropriate for the purpose for which the aircraft is to be used.
 (2) The authorised person or approved design organisation may determine that the airworthiness standard does not apply to the design.
 (3) The authorised person or approved design organisation must give CASA written notice of the determination.
 (4) CASA must:
 (a) decide whether or not CASA agrees with the determination; and
 (b) give the authorised person or approved design organisation written notice of its decision.
 (5) If CASA agrees with the