Part 4/7:
The engine replacement process is inherently different for airplanes. In scenarios where a car experiences an engine issue, mechanics can directly access and repair the problem. However, with aircraft, especially larger models like the Boeing 777, it is often more efficient to remove the entire engine for repairs rather than attempting extensive repairs in situ.
Typically, airlines maintain a stock of spare engines. If an engine encounters a problem, swapping it out allows the aircraft to return to service quickly while repairs are conducted on the original unit. This is crucial for minimizing downtime, as an aircraft not in operation represents lost revenue.