In isolation, this gives us a reliable indication of the service life left in some of the engine’s components. But there are some outside factors that affect this reading, including humidity. This is a problem because it can make an engine appear to need maintenance earlier than it does.
To help reduce the disruption caused by this unnecessary maintenance, we can use local humidity levels to cancel out the effect on the TGT readings. But to do this properly, we need rapid access to accurate, reliable data for every airport served by Trent XWB engines. Until recently, this data source did not exist. In fact, a single source of truth for any weather data, not just humidity readings, did not exist – a challenge facing other colleagues across Rolls-Royce.