News Summary

• Airlines are developing increasingly complex business-class seats.
• New seat designs must undergo rigorous certification by aviation regulators.
• But ongoing approval delays are derailing plans, leaving airplanes stuck at factories.
• Some airlines have faced longer setbacks as they have pursued more ambitious designs, such as Lufthansa's Allegris-equipped Boeing 787-9..
• KLM, the Dutch flag carrier, plans to start operating its first Airbus A350 in October — but all 34 business- class seats will be empty, potentially leaving millions of dollars of revenue on the table.