From Alan Levin By Bloomberg News U.S. aviation regulators granted approvals that will allow some jetliners to operate within zones where new 5G wireless services are set to begin Wednesday, significantly reducing the potential impact on flight schedules. The Federal Aviation Administration said on Sunday airline manufacturers had shown that the mobile-phone signals won’t cause interference with critical aircraft equipment on certain Airbus SE and Boeing Co. models. New 5G services by AT&T Inc. and Verizon Communications Inc. set to begin across numerous communities in the U.S. broadcast on radio waves that are adjacent to those used by so-called radar altimeters on thousands of airliners, helicopters, and other aircraft. Tests showed that the altimeters could give false readings in the presence of 5G signals. “Even with these new approvals, flights at some airports may still be affected,” the FAA said in an emailed statement. “Passengers should check with their airlines …