VAI replies to FCC on spectrum changes that interfere with radio altimeters Transition requires coordinated timelines and fair reimbursement for operators. At the direction of US Congress through the One, Big, Beautiful Bill Act, the Federal Communications Commission (FCC) has proposed repurposing and auctioning portions of the Upper C-band spectrum (3.7-3.98 GHz), which will require aviation to upgrade radio altimeters due to interference concerns. VAI, joined by a broad aviation coalition, supports the action but cautioned the FCC to implement “practicable timelines for any radio altimeter retrofit or replacement using a ‘one-and-done’ approach.” In reply comments following the group’s original submission, the coalition emphasized protecting aviation safety while enabling wireless expansion. This action will affect all aircraft operating in the United States and is expected take years to complete (with an estimated 2034 implementation timeline). The coalition’s analysis, informed by avionics manufacturers and OEM input, estimates the upgrade cost at around $120,000 per radio altimeter, compared with the FAA’s initial $80,000 per aircraft estimate. In its reply comments, VAI urged regulators to reimburse operators for all reasonable costs associated with upgrading aircraft with interference-tolerant radio altimeters. These new systems will improve resilience and support more efficient spectrum use. Because many vertical lift operators are small or mid-sized businesses, VAI argues that lack of reimbursement would slow compliance and disrupt critical services. As this is a long-term transition, VAI will continue to push for reasonable transition timelines and reimbursements of costs associated with radio altimeter replacement. Read the Coalition’s reply. Read VAI’s reply to the FCC.
