The delegation program has come under scrutiny on multiple occasions since then.
In 2011, after a review stretching nearly two years, the Transportation Department’s inspector general released an audit that raised concerns about the F.A.A.’s oversight of the program.
The report warned that the new delegation program created the risk that plane makers could choose employees “with inadequate qualifications or a history of poor performance to approve certification projects.” The report cited an instance where F.A.A. engineers were concerned about the “integrity” of an employee acting on the agency’s behalf at an unnamed manufacturer because the employee was “advocating a position that directly opposed F.A.A. rules on an aircraft fuel system in favor of the manufacturer.”
Representative Daniel Lipinski, Democrat of Illinois, had requested the review. On Monday, he said that the delegation program, known in aviation lingo as the O.D.A. program, had not been a source of concern in recent years, but that the two crashes should prompt another look at it.
“Part of the question is, did the O.D.A. program, did that in any way impact the certification of these planes?” he said. “I think it’s a legitimate question.”
In another audit released in 2015, the inspector general’s office again reviewed the F.A.A.’s oversight of the delegation program. Once again, the watchdog raised concerns about the F.A.A.’s supervision of the program, including about the focus of its oversight work and whether there was adequate staffing to perform that work.
“Industry representatives expressed concern that F.A.A.’s focus was often on paperwork — not on safety-critical items,” the report said.
One factor in the debate is the F.A.A.’s budget. If Congress wanted the government to handle more certification work without slowing down the approval of new planes, lawmakers would most likely need to drastically increase funding for the F.A.A. so it could expand its staff. Instead, Congress has encouraged the F.A.A. to delegate more certification work to manufacturers.