AV8R,. .. .Your obviously not aware that the weather radar transciever uses recirc air to cool itself. How many of these have you trashed by turning the fans off ?. .. .The aircraft designer/manufacturer would stipulate if this was an approved procedure, but obviously you know better ?. . . . <small>[ 13 March 2002, 13:34: Message edited by: Golden Rivet ]</small>