Removing three Boeing 737 fuselages from the Clark Fork River in western Montana following a train derailment could take until Tuesday.
Montana Rail Link spokeswoman Lynda Frost says progress at the site on Sunday is slow as a crew of 50 with eight heavy equipment machines worked in conjunction on the steep bank.
No one was injured when 19 cars from a westbound train derailed Thursday about 10 miles west of Alberton. The cause of the derailment is under investigation.
The train carried six fuselages. Three others also fell off but stayed on land.
Boeing says it has experts at the scene to assess the damage.
The fuselages were traveling from a Spirit AeroSystems plant in Wichita, Kansas, to a Boeing facility in Renton, Washington, to be assembled into airliners.