The NZ-12 is a type of turbine engine designed and developed by Bristol Siddeley Engines Ltd for the Royal New Zealand Air Force. It is a two-spool gas turbine engine designed for long-range and long-endurance aircraft, such as the P-3 Orion. The engine produces 3,147 kW (4,215 shp) at take-off, with a maximum cruise power of 1,501 kW (2,000 shp). The engine has a design life of 18,000 hours or two years of typical operation, and it has been proven to have a mean time between overhaul of 5,880 hours or 420 flights. The NZ-12 complies with nearly all current applicable international safety standards and features a FADEC system that ensures optimal engine performance and efficiency. The engine has also passed the Noise Assessment Regulations, achieving a low noise-level rating.