Altitude alerting system or device: Turbojet-powered civil airplanes.

CFR · 2024-01-01 · US · Title 14

(a) Except as provided in paragraph (d) of this section, no person may operate a turbojet-powered U.S.-registered civil airplane unless that airplane is equipped with an approved altitude alerting system or device that is in operable condition and meets the requirements of paragraph (b) of this section. (b) Each altitude alerting system or device required by paragraph (a) of this section must be able to— (1) Alert the pilot— (i) Upon approaching a preselected altitude in either ascent or descent, by a sequence of both aural and visual signals in sufficient time to establish level flight at that preselected altitude; or (ii) Upon approaching a preselected altitude in either ascent or descent, by a sequence of visual signals in sufficient time to establish level flight at that preselected altitude, and when deviating above and below that preselected altitude, by an aural signal; (2) Provide the required signals from sea level to the highest operating altitude approved for the airplane in which it is installed; (3) Preselect altitudes in increments that are commensurate with the altitudes at which the aircraft is operated; (4) Be tested without special equipment to determine proper operation of the alerting signals; and (5) Accept necessary barometric pressure settings if the system or device operates on barometric pressure. However, for operation below 3,000 feet AGL, the system or device need only provide one signal, either visual or aural, to comply with this paragraph. A rad

official document · source cfr-2024 · id 14:§ 91.219