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4.6.1.6 retrofitting new propulsion systems

Retrofitting new propulsion systems involves modifying an existing aircraft to install a new or updated propulsion system, such as a more efficient engine, electric motor, or hybrid propulsion system.
This process aims to improve the aircraft's performance, reduce emissions, and increase fuel efficiency, while also extending its operational life. Retrofitting can be a cost-effective way to upgrade an aircraft's capabilities, as it avoids the need for a completely new airframe design. However, it requires careful consideration of factors such as structural integrity, aerodynamic compatibility, and system integration to ensure safe and efficient operation.