Under the initiative, either Singapore Changi Airport (SIN) or Seletar Airport (XSP) will be used as a testbed to co-develop what CAAS describes as a “comprehensive readiness framework” for integrating open-fan engines and next-generation aircraft into existing airport operations. The work will cover aircraft and engine design considerations, airport infrastructure modifications, changes to operational procedures, safety standards and regulatory processes.
It makes sense, at that altitude birds are frozen solid.
Hehe, I expect they're thawed before the test, but who knows!
The GE9x is shown being tested by launching a block of solid ice at the fan, and it shreds the ice!