Complex sentence: After four months of service with Swiss, this goal seems to be achieved but the statistical sample is reduced with only three aircraft and 1,500h flown: "nuisance messages" from the integrated avionics suite and the PW1000G start-up delays are the main griefs.
Split into simpler sentences: After four months of service with Swiss, this goal seems to be achieved but the statistical sample is reduced with only three aircraft and 1,500h flown. "Nuisance messages" from the integrated avionics suite and the PW1000G start-up delays are the main griefs.