> these aircraft shouldn't be in the air at all with a radar altimeter that is so dangerously defective A radio altimeter is not required equipment for flight,

> these aircraft shouldn't be in the air at all with a radar altimeter that is so dangerously defective A radio altimeter is not required equipment for flight, nor does lack thereof make for a dangerous aircraft. It is required for certain approaches used during periods of poor visibility. The FAA has correctly published NOTAMs and ADs prohibiting those approaches. There is no need to ground aircraft over this.