By Allison Lampert, David Shepardson and Tim Hepher (Reuters) -Boeing and GE Aerospace are scaling back their public activities following the fatal crash of an Air India jetliner, with the planemaker's CEO canceling his trip to the Paris Airshow next week and GE postponing an investor day.

An investigation is underway as to what caused an Air India airliner carrying 230 passengers and 12 crew members to crash shortly after takeoff on Thursday.

Air India plane crash investigators find the first of the "black boxes" from the Boeing 787-8 that slammed into buildings, killing all but one of the 242 people on board.