Radio altimeters for rotorcraft operations.
CFR · 2024-01-01 · US · Title 14
(a) After April 24, 2017, no person may operate a rotorcraft unless that rotorcraft is equipped with an operable FAA-approved radio altimeter, or an FAA-approved device that incorporates a radio altimeter, unless otherwise authorized in the certificate holder's approved minimum equipment list. (b)
official document · source cfr-2024 · id 14:§ 135.160