i have seen these documents last night and Chinese libtards spreading it on twitter.
something fishy about this document. neither have official seal on it and one document with seal clearly looks fabricated. and two Aircrafts mentioned in this documents flying at high intensity.. there are many other things which doesn't match as well..
waiting for further information if these documents are true. we don't even know the actual problem..
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remember one thing, monthly average availability rate of C919 still behind in comparison with Airbus/Boeing counterparts.
Quality Control (QC) in civil aviation ensure aircraft meet strict safety and performance standard It involves routine part inspections, functional testing, and regulatory audits. QC inspectors verify that every repair, assembly, and maintenance action strictly follows official manufacturer manuals and engineering.
Quality Control (QC) in civil aviation is heavily dictated by an aircraft's design and production maturity. C919 is still in early stages and evolving program.