Foodstuffs, Cosmetics and Disinfectants Act, 1972
R 385
Civil Aviation Act, 2009 (Act No. 13 of 2009)RegulationsCivil Aviation Regulations, 2011Part 121 : Air Transport Operations - Carriage on Aeroplanes of more than 19 Passengers or CargoSubpart 5 : Aeroplane Instruments and Equipment121.05.4 Altitude alerting system |
| (1) | A large turbine-engine aeroplane shall not be operated unless it is equipped with an altitude alerting system capable of— |
| (a) | alerting flight deck crew members upon approaching preselected altitude in either ascent or descent in sufficient time to establish level flight at such preselected altitude; and |
| (b) | alerting by at least an aural signal the flight deck crew members when deviating above or below a preselected altitude. |
| (2) | A large turbine-engine aeroplane shall not be operated unless such an aeroplane is equipped with a pressure-altitude reporting transponder which operates in accordance with the requirements stipulated in Part 91 and is capable of— |
| (a) | providing pressure-altitude information with a resolution of 25 ft, or better from its aeroplane data source; and |
| (b) | automatically providing information on its airborne or on-ground status by means of a Mode S transponder. |
Note 1: These provisions will improve the effectiveness of airborne collision avoidance systems as well as ATS that employ Mode S radar. In particular, tracking processes are significantly enhanced with a resolution of 7.62m (25 ft), or better.
Note 2: Mode C replies of transponders always report pressure altitude in 30.50m (100ft) increments irrespective of the resolution of the data source.
[Regulation 121.05.4(2) substituted by section 20(e) of the Thirty-Third Amendment of the Civil Aviation Regulations, 2026, Notice No. 7844, GG55226, dated 21 August 2026 and shall come into operation upon Publication in the Government Gazette, save for Part 92, which shall come into operation upon the Proclamation by the President of the Civil Aviation Amendment Act, 2021 (Act No. 22 of 2021]
[Regulation 121.05.4 substituted by regulation 16(f) of Notice No. R. 3170, GG48228, dated 17 March 2023 (Twenty-Sixth Amendment of the Civil Aviation Regulations, 2023)]
