High maintenance and fuel costs squeeze Chinese airlines as replacement rates lag, while Comac’s home-grown model seen as buffer against supply-chain hurdles.

China’s home-grown jets will be able to stay in the air for longer as maintenance centres open on the mainland, some with Hong Kong servicers.

High maintenance and fuel costs squeeze Chinese airlines as replacement rates lag, while Comac’s home-grown model seen as buffer against supply-chain hurdles.

China's massive civil aviation fleet is ageing faster than planes are being replaced, threatening to saddle airlines with higher costs, but orders for home-grown C919 jets could…