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Old 16th Apr 2017, 16:54
  #1081 (permalink)  
Join Date: May 2002
Location: Wanaka, NZ
Posts: 2,077
Originally Posted by [email protected] View Post
So, one question is - even if Blackrock had been in the database, would the EGPWS have alerted with the gear down at a speed of less than 80kts?.
From the manual:

"When the landing gear lowers, Mode 4B becomes active and the boundary decreases to 100 ft when
above 120 Kts (100 Kts on fixed gear aircraft). As airspeed decreases below 120 Kts, the warning boundary
decreases to 10 ft at 80 Kts. The voice message is “TOO LOW TERRAIN”."

I don't know how the boundary changes given the LOW ALT mode was engaged, I can't see anything on that other than "significantly reduces mode 4 boundaries".

Last edited by gulliBell; 16th Apr 2017 at 17:10.
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