Congress heard testimony today alleging that the Federal Aviation Administration speeded approval of the Eclipse 500 very light jet (VLJ), despite concerns over safety and production. The Eclipse 500, one of the first VLJs to enter the market, had been heralded as the start of a new era in private aviation, where point-to-point charter flights, operated by so-called air taxis, would be within the reach of the average flier. But as mechanical problems and production delays hampered the Eclipse 500 in the years since its introduction in 2006, critics also alleged that the plane was rushed to market, with the F.A.A. partly to blame.

Calvin Scovel, Inspector General for the Department of Transportation, told the House Aviation Subcommittee that the F.A.A. was aware of issues with the Eclipse 500 when they issued the manufacturer a certification for the VLJ. The F.A.A. went ahead with certification, Scovel said, due to both a cozy relationship with Eclipse and a more lax regulatory stance from the agency as a whole.

Among the specific allegations raised against the F.A.A. are those from David Downey, an F.A.A. manager put in charge of engineering compliance for the Eclipse 500. He said he was removed from the project after voicing safety concerns about the jet. His colleague Dennis Wallace, meanwhile, testified that he was rebuked by senior F.A.A. management for his reluctance to approve plane software he believed was unready.

Another F.A.A. employee, Ford Lauer, testified that his inspection of Eclipse 500s revealed some shoddy workmanship, but that Eclipse management had an open line to higher-ups at the F.A.A. Eclipse would complain to corporate-friendly F.A.A. management about what they saw as overly intrusive inspections, and the F.A.A., in turn, modified instructions to employees. Lauer said that the F.A.A. then scaled back inspections, putting a cap on how long inspectors could look at the planes, while limiting access to the guts of the aircraft, so as to not interfere with Eclipse’s production timetable.

The F.A.A.’s own hopes for the plane may have played a role in the agency’s alleged behavior. With the nation’s aging air traffic control system sagging under the weight of flights between regional hubs, some in the F.A.A. may have believed that the promise of point-to-point flights offered by the Eclipse 500 would alleviate some of that stress.

Other critics say the Eclipse certification episode is indicative that regulatory agencies are acting less as guardians of public safety and more as favor-dispensing buddies to the very industries they are charged with overseeing. In the end, this corporate-friendly approach may have had a negative effect on the industry as a whole, as design flaws, production delays, and safety concerns, highlighted most recently by a throttle malfunction that grounded Eclipse 500s this summer, have stalled the progress of the VLJ market.

An internal F.A.A. investigation, called a special certification review, convened in August and determined that the agency had acted appropriately through the certification process. F.A.A. administrators reiterated these claims in their testimony before Congress today. Eclipse denies any wrong doing or interference, and points to the disagreement as an internal F.A.A. matter