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Civil Aviation Act, 2009 (Act No. 13 of 2009)

Regulations

Civil Aviation Regulations, 2011

Part 121 : Air Transport Operations - Carriage on Aeroplanes of more than 19 Passengers or Cargo

Subpart 5 : Aeroplane Instruments and Equipment

121.05.5 Terrain awareness and warning system

 

(1) All turbine-engine aeroplanes of a maximum certificated take-off mass in excess of 15 000 kg or authorised to carry more than 30 passengers, for which the individual certificate of airworthiness is first issued on or after 1 July 1979, shall be equipped with a TAWS.

 

(2) All turbine-engine aeroplanes of a maximum certificated take-off mass in excess of 5 700 kg or authorised to carry more than nine passengers, for which the individual certificate of airworthiness is first issued on or after 1 January 2010, shall be equipped with a TAWS which has a predictive terrain avoidance function.

 

(3) All turbine-engine aeroplanes authorised under this Part to carry passengers shall be equipped with a TAWS which has a predictive terrain avoidance function.

 

(4) As from 1 January 2013 all piston-engine aeroplanes of a maximum certificated take-off mass in excess of 5 700 kg or authorised to carry more than nine passengers shall be equipped with a TAWS which provides the warnings contemplated in subregulations (6)(a) and (c), warning of unsafe terrain clearance and a predictive terrain avoidance function.

 

(5) A TAWS shall automatically provide a timely and distinctive warning to the flight crew when the aeroplane is in potentially hazardous proximity to the earth's surface.

 

(6) A TAWS shall provide, unless otherwise specified herein, warnings of the following circumstances—
(a) excessive descent rate;
(b) excessive terrain closure rate;
(c) excessive altitude loss after take-off or go-around;
(d) unsafe terrain clearance while not in landing configuration;
(i) gear not locked down; or
(ii) flaps not in a landing position; and
(e) excessive descent below the instrument glide path.

 

(7) No person shall inhibit or otherwise render inoperative any required TAWS during flight time except in accordance with the approved aeroplane flight manual.

 

(8) An air service operator shall implement database management procedures that ensure a timely distribution and update of current terrain and obstacle data to TAWS.

[Regulation 121.05.5(8) inserted by regulation 16(g) of Notice No. R. 3170, GG48228, dated 17 March 2023 (Twenty-Sixth Amendment of the Civil Aviation Regulations, 2023)]