The third prototype, AC103, completed ground and flight tests for hot and humid conditions last month at Changsha. AC102 demonstrated high-altitude field performance at Golmud, Qinghai, in June. Comac quotes FAA officials as saying May trials of minimum takeoff speeds were outstanding.
Comac is compensating its suppliers for the lateness of ARJ21 certification. More supplier compensation will be due if, as is likely, the ARJ21 misses its production targets.