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EGPWS LINE MAINTENANCE MANUAL
CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO.: 060-4199-180 REV: G SHEET 19 of 68
2.2.21 LAMP FORMAT
The EGPWS contains two different caution/warning lamp illumination formats as described below.
Lamp Format 1 provides EGPWS warning (red) and caution (amber) alert lamp drive logic such that:
• Only a Mode 5 “Glideslope” alert will activate the caution lamp output (amber).
• All other alerts (except “windshear” and Mode 6 callouts) will activate the warning lamp output (red).
Lamp Format 2 provides EGPWS warning (red) and caution (amber) alert lamp drive logic such that:
• Only the warning alerts containing the phrase “Pull Up” will activate the warning lamp output (red).
• All other alerts (except “windshear” and Mode 6 callouts) will activate the caution lamp output (amber).
Note: Actual legends may vary.
EGPWS caution or warning alerts lamp driver outputs are activated for all Mode 1-5 GPWS alerts and Terrain or
Obstacle alerts when enabled. Windshear warning and caution alerts activate separate lamp outputs when
enabled.
Modes 1-4, TA
Mode 5 only
(AMBER)
“SINK RATE, SINK RATE”
“PULL UP”
“TERRAIN, TERRAIN”
“OBSTACLE, OBSTACLE”
“CAUTION TERRAIN”
“CAUTION OBSTACLE”
“TOO LOW TERAIN”
“TOO LOW GEAR”
“TOO LOW FLAPS”
“DON’T SINK”
“
GLIDESLOPE”
All caution and
warning alerts
BELOW
GS
Push to Cancel
(RED)
PULL
UP
Push toTest
All Modes, TA
All warning alerts
All Modes, TA
All caution alerts
GPWS
(AMBER)
“SINK RATE, SINK RATE”
“TERRAIN, TERRAIN”
“OBSTACLE, OBSTACLE”
“CAUTION TERRAIN”
“CAUTION OBSTACLE”
“TOO LOW TERAIN”
“TOO LOW GEAR”
“TOO LOW FLAPS”
“DON’T SINK”
“GLIDESLOPE”
“
PULL UP”
(RED)
PULL
UP
Push to Test
Glideslope
Push to Cancel