How is the Basis of Certification (BoC) maintained through the service life of DND aircraft derived from commercial passenger-carrying aircraft, such as the CC144 Challenger and the CC150 Polaris?
The Basis of Certification (BoC) for aircraft derived from commercial models is defined (and approved by the Technical Airworthiness Authority (TAA)) at type certification and remains in effect throughout the service life of the aircraft. Usually the TAA-approved BoC is the same as, or only slightly different, from the original type BoC approved by the civil authority who issues a civil Type Certificate. The BoC would normally only be changed if a design change is proposed that could not be accommodated within the existing BoC. For example, if a new avionics capability was proposed and the certification standards in the existing BoC is not suitable to address the certification of the new avionics system, then additional certification requirements would be added to the existing BoC. It is important to note that the rest of the BoC does not change.
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