The Midlands Air Ambulance has been grounded by the company which operates its EC-135 craft - the same model as the chopper which crashed into a pub in Glasgow.
Bond Air Services says it has temporarily grounded 38 EC135-model helicopters globally after discovering a "defect" in one of them.
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The charge relates to the death of Flight Lieutenant Sean Cunningham at RAF Scampton, Lincolnshire, in 2011.
Jake Livermore, who joined from Spurs in 2014, has made 25 appearances for Hull this season and 104 in total.
The officers are due to answer allegations relating to offensive messages that were exchanged within a private phone messaging group.