LOS ANGELES, July 9 — United Airlines said it is investigating how the wheel of a Boeing 757-200 fell off on takeoff from the Los Angeles International Airport yesterday.

WASHINGTON, July 9 — The United States Federal Aviation Administration (FAA) said yesterday it has ordered inspection of passenger masks in around 2,600 Boeing aircraft due to issues with adhesive materials that could cause them to shift out of position, reported German news agency.