A community group opposed to the expansion of Los Angeles International Airport has submitted a public records request to determine whether the city is violating the terms of a settlement agreement reached in 2006.

Attorneys for the Alliance for a Regional Solution want to review LAX's planning documents before deciding whether to file a default notice against the airport for failing to comply with a settlement brokered by Los Angeles Mayor Antonio Villaraigosa, which scrapped most of his predecessor's airport expansion plan.

The settlement - reached with ARSAC, the county and three cities - calls for capping the airport at 78.9 million passengers annually, seeking ways to regionalize air traffic and provide noise mitigation to those living around LAX.

In a records request sent last month to LAX, ARSAC asked for updates on the airport's master plan, including an ongoing environmental study to determine whether the two northern runways should be separated to address safety concerns.

The group also requested information about air quality studies, traffic improvements, aircraft noise levels, security and the airport's plan to develop at least eight FlyAway shuttle routes by 2015.

"We have already forwarded a record to ARSAC as well as links to documents available on our website," said LAX spokeswoman Nancy Castles. "We are continuing to gather more documents and will forward those to ARSAC in as timely a manner as possible."