What would cause my indicator to be stuck at a high speed all the time? Last Updated: 02/20/2008
A common cause of this is over pressure being applied to the Pitot tube. Aircraft are often washed using a high-pressure water hose. A careless mechanic may spray the hose across the Pitot tube applying high pressure to the air speed indicator. This will usually destroy the diaphragm. Units damaged in this way normally cannot be repaired and must be replaced.