AMC1 ACNS.E.TAWS.035 Aural and visual alerts

• ED Decision 2019/011/R found in: GM Remote Aerodrome Air Traffic Services (ED 2019/004/R) Issue 2 (Jul 2020)

AMC1 ACNS.E.TAWS.035 Aural and visual alerts ED Decision 2019/011/R (a) The testing of the TAWS system integration within the aircraft should address the provision of the alerts listed in Table 1 below. In addition to this minimum set, other implemented optional voice alerts should be tested. <table border="1" cellpadding="0" cellspacing="0" width="603"><tr><td valign="top" width="167"><p>Alert Condition</p></td><td valign="top" width="235"><p>Caution</p></td><td valign="top" width="202"><p>Warning</p></td></tr><tr><td valign="top" width="167"><p>Ground proximity</p><p>Altitude Loss after Take-off</p><p>Class A &amp; Class B equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘Don’t Sink’ and ‘Too Low Terrain’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>None Required</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Envelope 1 (Not in Landing Configuration)</p><p>Class A equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘Too Low Terrain’ and ‘Too Low Gear’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>None Required</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Envelope 2 Insufficient Terrain Clearance (Landing and Go around configuration)</p><p>Class A equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p> ‘Too Low Terrain’ and ‘Too Low Flaps’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>None Required</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Envelope 4C Insufficient Terrain Clearance (Take-off configuration)</p><p>Class A equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p> ‘Too Low Terrain’ </p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>None Required</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Excessive Glide Slope or Glide Path Deviation</p><p>Class A equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘Glide Slope’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>None Required</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Advisory Voice Call Out</p><p>Class A &amp; Class B equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>None Required</p><p>Aural Alert</p><p> ‘Five Hundred’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>None Required</p></td></tr><tr><td valign="top" width="167"><p>Reduced Required Terrain Clearance </p><p>Class A &amp; Class B equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>Minimum selectable Voice Alerts:</p><p> ‘Caution, Terrain; Caution, Terrain’ <u>and</u> ‘Terrain Ahead; Terrain Ahead’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>Red text message that is obvious, concise and must be consistent with the Aural message</p><p>Aural Alert</p><p>Minimum selectable Voice Alerts:</p><p> ‘Caution, Terrain; Terrain; Pull-Up, Pull-Up’ and ‘Terrain Ahead, Pull-Up; Terrain Ahead, Pull-Up’</p></td></tr><tr><td valign="top" width="167"><p>Imminent Impact with Terrain</p><p>Class A &amp; Class B equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>Minimum selectable Voice Alerts:</p><p> ‘Caution, Terrain; Caution, Terrain’ <u>and</u> ‘Terrain Ahead; Terrain Ahead’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>Red text message that is obvious, concise and must be consistent with the Aural message</p><p>Aural Alert</p><p>Minimum selectable Voice Alerts:</p><p> ‘Caution, Terrain; Terrain; Pull-Up, Pull-Up’ and ‘Terrain Ahead, Pull-Up; Terrain Ahead, Pull-Up’</p></td></tr><tr><td valign="top" width="167"><p>Premature Descent Alert (PDA)</p><p>Class A &amp; Class B equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘Too Low Terrain’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>None Required</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Envelope 1, 2 or 3</p><p>Excessive Descent Rate</p><p>Class A &amp; Class B equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘Sink Rate’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>Red text message that is obvious, concise and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘ Pull-Up’</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Excessive Closure Rate (Flaps not in Landing Configuration)</p><p>Class A equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘Terrain- Terrain’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>Red text message that is obvious, concise and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘ Pull-Up’</p></td></tr><tr><td valign="top" width="167"><p>Ground Proximity Excessive Closure Rate (Landing Configuration)</p><p>Class A equipment</p></td><td valign="top" width="235"><p>Visual Alert</p><p>Amber text message that is obvious, concise, and must be consistent with the Aural message</p><p>Aural Alert</p><p>‘Terrain- Terrain’</p></td><td valign="top" width="202"><p>Visual Alert</p><p>None required</p><p>Aural Alert</p><p>‘ Pull-Up’ - for gear up</p><p>None required - for gear down</p></td></tr></table> **TABLE 1: Visual and aural alerts** (b) If a two tone sweep (‘Whoop Whoop’) is used then the complete cycle of the two tone sweeps plus annunciation may be extended from ‘1.4’ to ‘2’ seconds. (c) Note: GPWS alerting thresholds may be adjusted or modified to be more compatible with the FLTA alerting functions and to minimize GPWS nuisance alerts. (d) Parameters such as airspeed, groundspeed barometric altitude rate should be included in the logic that determines basic GPWS alerting time. (e) GPWS alerting thresholds may be adjusted or modified to be more compatible with the FLTA alerting functions and to minimize GPWS nuisance alerts. (f) Consideration should be given to presenting voice announcements at a pre-set level via headsets when they are in use. [Issue: CS-ACNS/2]