Development of China’s C919 single-aisle plane, already at least five years behind schedule, is going slower than expected, a dozen people familiar with the programme told Reuters.
The state-owned Commercial Aircraft Corporation (Comac) is struggling with a range of technical issues that have severely restricted test flights.
Delays are common in complex aerospace programmes, but the especially slow progress is a potential embarrassment for China, which has invested heavily in its first serious attempt to break the hold of Boeing and Airbus on the global jet market.
The most recent problem came down to a mathematical error, according to four people with knowledge of the matter.
Comac engineers miscalculated the forces that would be placed on the plane’s twin engines in flight - known in the industry as loads - and sent inaccurate data to the engine manufacturer, CFM International, four people familiar with the matter told Reuters.
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As a result, the engine and its housing may both have to be reinforced, the people said, most likely at Comac’s expense – though another source denied any modification.
That and other technical and structural glitches meant that by early December, after more than two and a half years of flight testing, Comac had completed less than a fifth of the 4,200 hours in the air that it needs for final approval by the Civil Aviation Administration of China (CAAC), two people close to the project told Reuters.
Comac, which has been developing the C919 largely in secret since 2008, rarely discloses its targets. Company official Yang Yang told Chinese state media in September that he expected certification by the country’s regulators in two to three years, without giving any further details.
The company’s previous publicly stated target was end-2020. Other Comac officials have said they are aiming for certification and delivery in 2021.
Comac did not respond to Reuters requests for comment for this story. CFM, a joint venture between General Electric and France’s Safran, declined comment.
The C919 is designed to compete with the Boeing 737 Max and Airbus 320neo families. After Boeing and Airbus struck deals to take over production of rival planes made by Embraer and Bombardier, China’s Comac is now effectively the third option in the market for planes with more than 100 seats.
Most industry forecasters now expect the prolonged cyclical boom in demand for commercial planes to fade this year, as business confidence wanes amid geopolitical tensions, meaning a plane that debuts in 2021 or 2022 will likely miss out on orders for years to come.
Time pressure
Comac is aware of the time pressure. The last three of its six test flight C919s were put into the air for their first flight before the paint job had been completed, sources told Reuters.
Beijing made the C919 an integral part of its ‘Made in China 2025’ initiative, designed to catch up on sophisticated technologies and help the country become self-sufficient.
The effort has attracted the attention of US federal prosecutors, who in 2018 charged a group of Chinese intelligence officers, hackers and company insiders with breaking into the networks of 13 aerospace manufacturers around the world in order to steal sensitive data that might help China build a jet engine.
China has denied any involvement in hacking.
Beijing may not be entirely disappointed if the C919 jet fails to compete immediately in international markets, some analysts say, as the Chinese government can direct its own airlines to buy the jet.
Chinese state-owned carriers and leasing companies account for the vast majority of the 815 provisional orders Comac says it has received for the C919. The only overseas buyer so far is the leasing company GECAS, owned by General Electric.
