helicopterLOS ANGELES—A federal report released on Friday advises against issuing regulations to limit low-flying helicopters to cut down on chopper noise over the Los Angeles Basin.

The report by the Federal Aviation Administration said the region’s complex and congested airspace, its dense neighborhoods and varying topography makes it “extremely difficult if not impossible” to come up with a single remedy.

Instead, the FAA recommends taking voluntary measures to reduce helicopter noise.

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