Several studies have reported hydrogen (H₂) as a potential means to decarbonize the aviation industry. However, while it may represent a zero carbon fuel opportunity, introducing alternate fuels such as H₂ involves many gas turbine engine development activities. This presentation will provide an overview of P&WC sustainability agenda and some of the main aspects to be managed when burning H₂ in a gas turbine engine. Technology roadmaps will be discussed such as direct H₂ combustion and integrated aircraft systems that harvest liquid H₂ potential in order to maximize aircraft block energy efficiency. Environmental aspects such as non CO₂ emissions abatement options will be briefly explained. In conclusion, a perspective of the products timeline readiness for different H₂ aircraft families will be presented.