Boeing vows to return MAX to service but no date set as yet Executives at Boeing faced a fresh barrage of questions about its handling of the 737 MAX crisis at the Paris Air Show, following two deadly crashes since October. Boeing's head of commercial airplanes Kevin McAllister vowed that any lessons learned from the inquiries into why the new system failed to attract the attention of safety regulators would be applied across Boeing's civil and defence operations. IMAGES AND SOUNDBITES