The Federal Aviation Administration will give airlines another year to fix or replace airplane altimeters that can’t filter out cellular transmissions from outside their allotted frequencies. In a notice of proposed rulemaking (NPRM) released today, the FAA proposed a deadline of February 1, 2024, to replace or retrofit faulty altimeters, which are used by airplanes to measure altitude.
Out of 7,993 airplanes on the US registry, the FAA said it “estimates that approximately 180 airplanes would require radio altimeter replacement and 820 airplanes would require addition of radio altimeter filters to comply with the proposed modification requirement.” The total estimated cost of compliance is $26 million.
