American officials last week gave a tour to officials from the city engineering department to show what would be done to the superhangar.
"The timeline on that work goes through 2007 and beyond," Hotard said.
VanLoh said all the bond money must be spent by July 2008.
"We don't anticipate that being a problem at all," Hotard said.
One issue that remains between the city and American is the overhaul base's utility and wastewater treatment plant. The city took over the operations of the facility last December. Since then, VanLoh said, the city has invested millions of dollars upgrading it.
"When we took over the facility a year ago, it was a mess," he said. "We had to do a lot of engineering work, and we've replaced a lot of equipment."
Although American pays its monthly utility bills, VanLoh said the airline owes nearly $4 million for work that has been done on the plant.
American said it is talking to the city about the amount owed on the utility plant upgrades.
"We've disputed some of the billings, and we're not going to say anything beyond that," Hotard said. "We continue to work with the city on it."
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The focus is to use the airport's expansive real estate holdings -- 12.5 square miles, not its air service, as the primary engine for growth.
American Airlines is bidding to become Boeing's North American provider of maintenance service for the new Boeing 787 aircraft.
Aviation Director Mark VanLoh proposed letting private business oversee the more than 400 taxis that line up for fares at Kansas City International Airport.
The Universal Fault Interrupter, which was engineered and tested at American's Tulsa Maintenance Base, protects the center fuel tank from electrical sparks that could cause an explosion.