If Boeing sold planes with altimeters that rely on frequencies that weren't allotted to aviation, then Boeing sold defective planes and should absolutely be res

If Boeing sold planes with altimeters that rely on frequencies that weren't allotted to aviation, then Boeing sold defective planes and should absolutely be responsible for retrofitting them. The fact that those frequencies are recently coming into use is immaterial. It would be different if Boeing designed their altimeters to only depend on spectrum that was allocated for aviation, but then the FCC came along and carved the 5G spectrum out of the aviation spectrum after Boeing built its planes.