An American Airlines Boeing 737 Max 8, on a flight from Miami to New York City, comes in for landing at LaGuardia Airport on March 11, 2019, in the Queens borough of New York City.
CEO Dennis Muilenburg has publicly said he regrets the deaths and the company set aside $100 million of assistance for victims' families.
"I think the families are in agreement that Boeing's apologies to cameras have not been apologies to the families," Stumo testified.
Boeing spokesman Peter Pedraza did not dispute the lack of communication with the victims' families.
Regulators grounded the 737 Max worldwide in March following the second crash.