The global Aircraft Gearbox market size was valued at USD 3.4 billion in 2025 and is projected to reach USD 7.1 billion by 2033, growing at a CAGR of 8.90% from 2026 to 2033. Factors such as CAGR of the aircraft gearbox market, driven by commercial aircraft deliveries, growing acceptance of geared turbofans, and continuous expenditure on defense aviation, favor the steady growth of the aircraft gearbox segment.