I am involved in a program where the aircraft (B737) will undergo a major modification taking approximately 2 years which will ultimately result in a new type certificate being issued under a new authority. (Foreign) My question is do you continue with the continuing airworthiness requirements of the current document set i.e. MPD and other such manuals published as part of the current type certificate (A16WE) issued by the FAA until such time that the modification is released and new type certificate issued or does the design organization embodying the modification take control of all continuing airworthiness documentation and decide what happens and when?
My thinking is, irrespective of the aircraft eventually becoming a new type it has history and it has a current type certificate therefore my expectation would be you should continue to manage the current continuing airworthiness requirements associated with its current type certificate requirements. Only once the modification is completed does the new document set become applicable because only then would the new type certificate come into effect.