What appears to be an aircraft engine belonging to American Airlines Flight 5432 was lifted out of the Potomac River on Monday morning, beginning the complex job of removing the last of the wreckage after a military helicopter collided with it and crashed last Wednesday.

A large portion of the fuselage from the American Eagle passenger plane that crashed with an Army Black Hawk helicopter in Washington, D.C., last week was pulled from the Potomac River on Monday, officials said.

A regional jet carrying 64 people collided with an Army Black Hawk helicopter. Reagan National Airport grounded all flights.