Since the Alaska Airlines incident, a string of whistleblowers, including Sam Salehpour, a current engineer at Boeing, and Roy Irvin, a former quality investigator, have raised safety concerns.
During the hearing, Mr Blumenthal said a dozen whistleblowers had come forward.
“It is a moment of reckoning, and an opportunity to change a broken safety culture”, Mr Blumenthal said.
Mr Mohawk, who works at the Boeing 737 factory in Renton, Washington, recently told the panel he had witnessed mishandling of faulty parts.
He alleged the firm was cutting corners and losing track of parts that had been labelled as non-conforming, or not up to design standards, according to Mr Blumenthal.
There was a risk these parts made it in the aircraft because they were sometimes fixed or mislabeled when they should have been discarded
He said he “feared” the parts “were being installed on the 737s and that it could lead to a catastrophic event”, the report read.
“Mohawk has also alleged that he has been told by his supervisors to conceal evidence from the FAA, and that he is being retaliated against as result,” according to a statement from the Senate Homeland Security’s permanent subcommittee on investigations.
Mr Blumenthal called the allegations “chilling”.
“This is not an industry where it’s OK to cut corners, to reduce inspections, to take shortcuts and rely on broken parts that happen to be sitting around”, he said.
Boeing said it is reviewing the claims it heard about on Monday.
“We continuously encourage employees to report all concerns as our priority is to ensure the safety of our airplanes and the flying public”, it said.
Boeing also said it has increased the size of its quality team and “increased the number of inspections per airplane significantly since 2019”.