User:Ospalh/blue ice

Danger to aircraft
Blue ice can also be dangerous to aircraft. The National Transportation Safety Board has recorded at least three incidents where waste from lavatories caused damage to the leaking aircraft itself. These incidents are very similar. All involved Boeing 727s and in all cases waste from a leaking lavatory hit the engine number three, mounted at the right rear of the aircraft. This foreign object damage caused the engine to fall off in flight. The flights made safe emergency landings with the two remaining engines. Nobody was injured. Only one report specifically mentions ice, while another mentions "soft body FOD damage", indicating that in this case the "blue fluid" was not frozen.