![Singapore Airlines flight hit by 'rapid change in gravitational force' - and dropped 54m in four seconds](https://cdn.newsserve.net/en/knowledge/Singapore-Airlines_20190124.jpg)
Singapore Airlines flight hit by 'rapid change in gravitational force' - and dropped 54m in four seconds
A Singapore Airlines flight hit by severe turbulence experienced a rapid change in gravitational force and a 54m (178ft) altitude drop in four seconds, an investigation has found.
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