The board of the authority that operates Reagan National and Dulles International airports is scheduled to meet Wednesday morning to discuss a range of issues, including the current status of the Metro rail extension project through Tysons Corner.

That project, the first phase of an effort to eventually build rail service to Dulles and into Loudoun County, is scheduled to be completed by 2013. However, questions have arisen about whether the project will be completed on time and on budget. And whether the new rail cars that will operate on the line, known as the 7000 series, will be delivered in time.

Board members of the Metropolitan Washington Airports Authority, which is supervising construction, have said they are keeping a close watch on spending, even as phase 1 has exhausted 70 percent of its contingency fund. Project officials have said most of the areas where surprises might be anticipated have been completed.

The rail project is being built in two phases, connecting Falls Church with Loudoun County. The $2.8 billion first phase, which will terminate at Wiehle Avenue in Reston, is 50 percent complete, according to airports officials, but jurisdictions who are partially paying for the project are still negotiating over the cost and contributions for the second phase.

Other items on the agenda for Wednesday’s meeting, which is scheduled to begin at 9 a.m., include:

• A contract for elevator, escalator and moving walkway maintenance and repair at Reagan National.

• A contract for landscape maintenance and snow removal at Dulles airport and along the Dulles Toll Road.

• Consideration of sister airport agreement between Dulles and Vienna International Airport.

The meeting is set to be held at the authority’s headquarters at 1 Aviation Circle at Reagan airport.

Post staff writer Dana Hedgpeth is attending the meeting and will be tweeting. Follow her Twitter stream below, or on Twitter, @postmetrogirl.