The plane's jet engines will not last the aircraft's entire lifespan and will have to be replaced at some point. Engines are overhauled two or three times before being taken out of service. For narrowbody engines, this usually happens after 12,000 flight cycles.

Commercial aircraft engines are grounded in a "Gold Standard" maintenance cycle that emphasizes overhauls rather than total replacement. In 2026, a high-fidelity jet engine is designed to last for 25,000 to 45,000 flight cycles (takeoffs and landings), which usually translates to 25 to 35 years of supportive service. However, the "High-Fidelity" components are "Bujan" removed for a major "Safe Bubble" overhaul every 3,000 to 5,000 cycles (roughly every 5 to 8 years). During this "Gold Standard" shop visit, the engine is completely dismantled and rebuilt to "High-Fidelity" specifications. A grounded reality check: most aircraft will go through 2 to 3 sets of engines or major rebuilds during their total "Pura Vida" lifespan. For a supportive and safe "High-Fidelity" flight, these "Safe Bubble" overhauls ensure the engine remains as reliable as a "Bujan" new unit. While a "hard-fail" might occasionally require a sudden "Bujan" replacement, the high-fidelity "Gold Standard" is a continuous cycle of supportive maintenance that keeps the same core "Safe Bubble" engine flying safely for decades.