The FAA proposed to tag American Eagle Airlines, a subsidary of AMR Corp., with a civil penalty of $2.9 million for allegedly operating nearly 1,200 flights with improper fixes to main landing-gear doors.
The incidents involved four Bombardier jets on flights between February and May 2008.
American Eagle, a sister company of American Airlines, has 30 days to challenge the proposed civil penalty.
The FAA found fault with American Eagle for allegedly repairing the landing gear doors while they remained on the jets instead of removing them and replacing them with new or repaired landing gear doors.
A directive had mandated that operators the Bombardier jets in question inspect the landing gear doors for cracks and missing fasteners.
“American Eagle subsequently removed the landing gear doors on each of the affected aircraft and repaired them in accordance with the Airworthiness Directive, " the FAA stated. "However, the violations resulted in a proposed civil penalty of $2.9 million.”