CS ACNS.E.TAWS.010 Required Functions and Interfaces

• ED Decision 2013/031/R found in: GM Remote Aerodrome Air Traffic Services (ED 2019/004/R) Issue 2 (Jul 2020)

CS ACNS.E.TAWS.010 Required Functions and Interfaces ED Decision 2013/031/R (See [AMC1 ACNS.E.TAWS.010](#_DxCrossRefBm573002816), [AMC2 ACNS.E.TAWS.010](#_DxCrossRefBm573002815)) TAWS Class A or Class B provides suitable alerting and warning capabilities and other system interfaces to support the following functions: <table border="1" cellpadding="0" cellspacing="0"><tr><td colspan="2" valign="top" width="459"><p>TAWS System Function</p></td><td valign="top" width="87"><p>Class A TAWS</p></td><td valign="top" width="100"><p>Class B TAWS</p></td></tr><tr><td valign="top" width="85"><p>Alerting</p></td><td valign="top" width="374"><p>Imminent contact with ground indications (GPWS functions) including:</p><p>(19) excessive Rates of Descent;</p><p>(20) negative Climb Rate or Altitude Loss After Take-Off or Go-around.</p><p>A Voice callout when descending through a predefined altitude above the terrain or nearest runway elevation.</p></td><td valign="top" width="87"><p>X</p><p>With a 500 ft call out </p></td><td valign="top" width="100"><p>x</p><p>With a 500 ft call out </p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>A forward Looking Terrain Avoidance (FLTA) function, including:</p><p>· a Reduced Required Terrain Clearance (RTC) function;</p><p>· an Imminent Terrain Impact function;</p><p>· a FLTA Turning Flight function.</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"><p>x</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>A Premature Descent Alert (PDA) function, including detection and alerting for Premature Descents Along the Final Approach Segment</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"><p>x</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>Excessive Closure Rate to Terrain</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>Flight Into Terrain When not in Landing Configuration</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>Excessive Downward Deviation from a glide slope or glide path</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>TAWS and sensor failure monitoring and annunciation function</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"><p>x</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>Capability to initiate the TAWS self-test function on the ground and where feasible in the air</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"><p>x</p></td></tr></table> <table border="1" cellpadding="0" cellspacing="0"><tr><td colspan="2" valign="top" width="459"><p>TAWS System Interfaces</p></td><td valign="top" width="87"><p>Class A TAWS</p></td><td valign="top" width="100"><p>Class B TAWS</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>A terrain display capability</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>Capability to drive a terrain display</p></td><td valign="top" width="87"></td><td valign="top" width="100"><p>x</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>The use of position source input</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"><p>x</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>The use of landing guidance deviation input</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>The use of radio altimeter sensor input</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>The use of Terrain and Airport information</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"><p>x</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>Interface with the flight recording system to record TAWS alerts and inhibition of the FLTA or PDA functions</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"><p>x</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>The use of landing gear and flaps position </p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>The use of roll attitude input</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="374"><p>The interface with flight deck audio systems</p></td><td valign="top" width="87"><p>x</p></td><td valign="top" width="100"></td></tr></table>