sia777SINGAPORE—The Singapore Airs (SIA) Boeing 777-300ER that suffered severe turbulence on May 21 experienced a gravitational force shift from +1.35G to -1.5G overSingapore Airs Fleet of B777 (Active) - Aviation website for aircraft and air information (flht, photo, travel, fleet listing, production list of Airbus Boeing Douglas Embraer Dash, ATR,