full engine testing, including rigorous endurance testing that simulates a multitude of aircraft missions and environments, and more than 470 hours on P&WC's 747 Flying Test Bed. The United States Federal Aviation Administration validated the PW814GA and PW815GA type certificate on February 24, 2017. In May 2017, 13,000h of testing were completed, including 3,500h in flight. In October this rose to 16,600 hours and 16,800 cycles, the first shop visit is scheduled at 10,000 hours and it needs 20% fewer inspections and 40% lower on-wing maintenance than its competitors In September 2018, the first Gulfstream G500 was delivered with the 14,000 lbf (62.3 kN) PW814. The Gulfstream G600 should be first delivered in June 2019, powered by the PW815. PW812 for the Falcon 6X The PW812D variant was selected for the Dassault Falcon 6X, replacing the cancelled 5X after troubles with its Safran Silvercrest engines, expecting a 2022 service entry. By May 2019, five test engines were tested over 1,000 h, including bird strikes, ice issues and blade off testing. By December 2021, a type certificate was issued by Transport Canada after more than 4,900h of testing, including more than 1,150h of flight testing, to allow the 6X to enter service on schedule in late 2022. Design The PW800 was originally going to be a geared turbofan like the PW1000G. Later announcements revealed that it wasn't going to feature a reduction gear. The engine will feature the Technology for Advanced Low NOx (TALON) X combustor, allowing it to exceed International Civil Aviation Organization (ICAO) standards for NOx by 50%, Carbon monoxide (CO) by 35% and that the engine should meet upcoming stage IV aircraft noise requirements. A previous version of the TALON combustor is in service with the Pratt & Whitney PW4000. MTU Aero Engines has a 15% share in the program, developing and producing various stage of the high-pressure compressor and the low-pressure turbine. The PW814/PW815 shares the core of the PW1500G geared turbofan, powering the Airbus A220. The PW812D shares the core of the PW1200G powering the Mitsubishi MRJ. Variants PW810 was to produce 8,830 lbf (39 kN) thrust to power the cancelled Cessna Citation Columbus. PW812D powers the Dassault Falcon 6X business jet. PW812GA powers the Gulfstream G400 business jet. PW814GA powers the Gulfstream G500 business jet. PW815GA powers the Gulfstream G600 business jet. Applications Cessna Citation Columbus (cancelled) Dassault Falcon 6X Gulfstream G400 Gulfstream G500 Gulfstream