Commission OKs 2 Noise Plans for Van Nuys Airport : Aviation: An ordinance was endorsed to phase out the noisiest jets. A second effort extends night curfew on loud jets and asks pilots to reduce thrust on takeoff.

The Los Angeles Board of Airport Commissioners on Monday adopted not one but two noise reduction plans for Van Nuys Airport.

Culminating nearly four years of study and debate, the board voted Monday to adopt a plan that was drafted by a panel of residents, pilots and airport officials. It also endorsed an ordinance--which must be passed by the City Council to take effect--that would phase out the noisiest jets at the airport over a six-year period.

The first plan, adopted in response to increasing complaints about aircraft noise in surrounding neighborhoods, would extend a nighttime curfew by one hour, encourage pilots to reduce thrust on takeoff and add a noise-abatement officer to the airport staff.

But some residents and local elected officials called the plan insufficient.

The first noise plan adopted Monday was drafted by the Van Nuys Airport Part 150 Committee, which takes its name from the number of the Federal Aviation Administration rule establishing such committees to cope with noise problems. The Part 150 committee developed the plan at dozens of public meetings over the past 3 1/2 years. The plan still must be approved by the FAA.

The plan would begin the nightly curfew on operations by the noisiest jets--those the FAA says produce 74 decibels of noise or more on takeoff--one hour earlier, at 10 p.m. The current curfew is from 11 p.m. to 7 a.m.

Other elements of the plan encourage pilots to reduce thrust during takeoff. The airport will be required to install equipment to monitor and identify noisy planes. Airport officials said they believe they can get the FAA to pay for the equipment.

The airport also would be required to hire a full-time noise-abatement officer to identify pilots who routinely violate noise limits and report violators to airport officials.

The commission also endorsed a noise ordinance that would gradually reduce noise by banning the noisiest jets at the airport over the next six years, despite the opposition of the Federal Aviation Administration.

Although the commission voted two years ago to tentatively support the jet ban, Clifton A. Moore, executive director of the city’s Department of Airports, had recommended taking no action on the plan.

In a letter sent to Moore Monday, Carl B. Schellenberg, regional administrator for the FAA, said the federal agency would not support the jet ban ordinance until after the Part 150 noise reduction plan has been approved and tested.

“We further believe approval of the proposed restriction would negate the investment that not only the airport, but its neighbors, operators, and the FAA have made in addressing noise problems at Van Nuys Airport through the Part 150 process,” Schellenberg said in the letter.