PWA211866 is a high-precision turbine nozzle guide vane produced by Pratt & Whitney, tailored for its PW4000 and JT9D turbofan engines powering large airliners like Boeing 747. It guides high-temperature and high-pressure gas to flow in a specified direction, optimizing the angle to drive turbine rotation efficiently, which ensures stable power transmission to the compressor and guarantees the engine's overall thrust performance.

Crafted from single-crystal nickel-based superalloy with a thermal barrier coating, it endures temperatures up to 1,700°C and resists thermal fatigue. Complying with AS9100D standards and FAA certifications, the 0.35kg component has a precisely contoured airfoil. It allows rapid visual inspection and dimensional checks during MRO, serving as a vital thermal-end part to maintain engine operational efficiency and safety.