The Metropolitan Washington Airports Authority board chose a Crystal City firm yesterday to manage its construction program at National and Dulles International airports and agreed to study the persistent problem of noise generated by night flights.

The three-year contract for the firm, Parsons Management Consultants, is expected to be worth almost $4 million, or 4 to 6 percent of the construction costs, in just the first 18 months of the airport renovation program.

The plan to build new terminals, roads, parking, runways and other improvements is expected to cost about $1 billion over the next five to seven years.

Parsons Management is a joint venture of four major construction services firms: Ralph M. Parsons Co. of Pasadena, Calif.; Parsons Brinckerhoff Construction Services of Herndon; Daniel, Mann, Johnson & Mendenhall of Los Angeles, and Delon, Hampton & Associates, Chartered, of the District.

The winner was chosen from among 14 proposals, said Ron M. Linton, chairman of the board's Operations Committee.

The firm will oversee the planning, design and construction of the airport improvements, including the development and review of design standards, technical review of designs, cost control, schedule control, documents management, inspections and testing of construction work, plans for the start-up and operation of completed projects, and the development and implementation of a plan to ensure the participation of businesses owned by minority group members and women.

On the noise issue, the board's Planning Committee said that it plans to review National Airport's restrictions on night flights as part of its study of ways to reduce airport noise.

National permits jet takeoffs and landings between 10 p.m. and 7 a.m. only by aircraft with advanced engines that do not exceed certain noise levels. The increased use of such aircraft has resulted in a rising number of night jet flights, which has triggered calls from some community groups for a ban on night jet flights.

The authority could change the noise rules to serve as a virtual curfew on jet flights, but the airlines have argued that the night flights represent local demand for air service.

In a letter to Citizens for the Abatement of Airport Noise, a regional coalition of citizens groups, Planning Committee Chairman Carrington Williams said the authority will review the night restrictions "with an eye toward seeing if they can be improved."

However, he rejected the group's call to reduce the number of daytime flights at National. Federal law permits up to 37 jet takeoffs or landings per hour at National, and it prohibits the authority from changing that number.

"Therefore, we see no basis on which the {authority} could adopt this recommendation," Williams wrote in answer to the group's proposal.