The Federal Aviation Administration (FAA) on Jan. 26, greenlighted additional altimeters, allowing 90 percent of the U.S. commercial aviation fleet to land in low visibility at airports where a risk of interference from 5G wireless signals is present. The agency had cleared about 78 percent of commercial planes as of the week ending Jan. 21. Airline operations had faced some disruption last week due to the rollout of 5G telecom towers at U.S. airports by Verizon and AT&T, which had already been twice delayed by regulators. The FAA has been reviewing aircraft devices called radio altimeters, which use radar to give precise measurements of a plane’s altitude for bad-weather landings. It was feared that the new 5G towers could cause interference with the altimeters, as they operate on the same neighboring wavelengths as the 5G technology. The FAA said that it had further approved seven additional altimeters, bringing the total …