China's narrowbody that has already carried passengers and a widebody still on paper. But both are asked at two different hours of the clock.
At the CATA meeting in Beijing, Comac general manager Shen Bo put the in-service type on a single scoreboard with more than 150,000 safe hours, more than eight million passengers, 26 cities. China Eastern remains the heaviest user, with 17 aircraft on the books. Planespotters counted 15 flying and two parked in mid-September and says it has built the operating-control, maintenance, material and data stack for larger-scale use. The same stand showed shortened and stretched C919 models and a C909 family that now includes cargo, medical and firefighting variants. Air China’s 12 August Beijing-Ulaanbaatar rotation was the first scheduled international passenger flight. Those are real movements. They are still not a published utilisation, dispatch-reliability and aircraft-on-ground file that an outsider can set next to an A320neo or a 737 MAX on the same city pair. Secondary accounts have floated dispatch reliability near 99.5 percent and daily use in a six-to-seven-hour band. Until China Eastern files those numbers the way it would for the rest of the fleet, they are claims, not a benchmark.
Scale for the C919 is now a hangar problem. Unscheduled snags, LRU turnaround, Leap-1C and Western component flow, pilot and mechanic throughput and whether Eastern’s dataset actually shortens entry-into-service for Air China and China Southern. Those decide whether a seventeenth jet is a fleet or a museum of firsts. Comac’s delivery rate is still measured in the tens per year, against an order book in the hundreds. Airline managers said in Guangzhou in August they want the type and cannot get the line speed. Domestic repair for engines and landing gear, including HAECO work in Xiamen, is how China tries to keep a C919 from sitting AOG on an export licence. That is how a home-market jet becomes an operating system other Chinese carriers can copy. It is not yet how it becomes an export product. A spare in Almaty an EASA validation clock and a third-country shop that can buy the catalogue are the difference.
The widebody is earlier, and harder. Shen Bo said the C929 is in a 'steady detailed-design' phase. A widebody of about 280 seats and 12,000 kilometres of design range, aimed at the A330neo and 787 class still has to survive system integration, static and fatigue tests, flight-test articles, production quality and airline confidence. Air China has been described as a preliminary launch customer that is not the same as a binding production order. First middle-fuselage hardware has been talked about for 2027. First flight and Chinese certification remain years beyond detailed design.
The engine is the part of the hall that decides both aircraft. AECC put 11 products on the CATA floor and said it is accelerating the CJ-1000A high-bypass turbofan for large commercial aircraft with lower emissions, noise and fuel burn. This is the domestic answer to the Leap-1C on the C919. Analysts have put Chinese certification and early installs in a 2027–29 window, mass production later. That engine is the C919 problem. The C929 needs a different thrust class. The CJ-2000 / AEF-3500 family is the candidate most often named in industry reporting after high-altitude bench work. Comac has not stood on a stage this month and named it as the frozen first-flight baseline. Until it does, powerplant selection remains an open gate. A drawing of a twin aisle without a mature, supportable engine is a brochure.
The questions that belong on one page are therefore operational for the jet that already flies and industrial for the jet that does not. What is C919 daily utilisation, no-go rate and AOG time in Eastern’s own numbers? How long does a wheel or an ECU take to return from the shop? Will overseas certification be sought, and on what clock? Who will hold the first spare engine outside China? Hours prove the C919 can work at home. Detailed design proves the C929 has left the slide deck. An engine that can be overhauled in a third country is what would make either of them a product the rest of the world can buy.