Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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1.9.4 Annunciator s & Switch/Annunciators
The devices shown below are West Coast Specialties and Staco switch/annunciators and are representative of
those used in some installations. However, there are other comparable devices on the market that may be
substituted at the installer/customers choice. The installer/customer is cautioned to verify regulatory
approval of the annunciation devices installed. See Appendix D for Vendors.
A. GPWS (P/TEST); BELOW G/S (P/CANCEL) switch/annunciator assemblies
The ‘GPWS’ annunciator provides visual indication of an EGPWS warning or alert. The GPWS annunciator
also has a momentary switch that is used to manually initiate EGPWS Self Test. Two GPWS annunciators
are required for each aircraft, one in the direct view of each pilot. If the Lamp Format 2 option is selected
(see 3.15.2.1), this switch/annunciator will be labeled ‘PULL UP’ and annunciated in red.
The ‘BELOW G/S’ annunciator provides visual indication of an EGPWS glideslope caution. The BELOW
G/S annunciator also has a momentary switch that is used to manually inhibit EGPWS Mode 5 glideslope
alerts. Two BELOW G/S annunciators are required for each aircraft, one in the direct view of each pilot. If
the Lamp Format 2 option is selected (see 3.15.2.1), this switch/annunciator will be labeled ‘GPWS’ and
annunciated in amber.
Vendor Name Vendor P/N Description QTY UM
West Coast Spec. 90-81401-001 GPWS BELOW G/S 2 EA
West Coast Spec. 90-81401-003 GPWS BELOW G/S ALT EA
West Coast Spec. 90-81401-008 GPWS BELOW G/S (1) ALT EA
West Coast Spec. 90-81401-009 GPWS BELOW G/S (1) ALT EA
STACO 61406-003 GPWS G/S CANCEL ALT EA
STACO 61406-004 PULL UP GPWS TEST ALT EA
STACO 61406-005 GPWS GPWS TEST ALT EA
STACO 61406-006 BELOW G/S G/S CANCEL ALT EA
(1) GPWS – BELOW G/S – GPWS FLAP OVRD – G/S CANCLD
B. GPWS FLAP OVRD; GPWS INOP; G/S CANCLD switch/annunciator assemblies
The ‘GPWS FLAP OVRD’ annunciator provides visual indication that the EGPWS Flap Override function is
activated. The GPWS FLAP OVRD annunciator also has a momentary switch that is used to manually activate
the Flap Override function.
The ‘GPWS INOP’ annunciator provides visual indication that the EGPWS’ GPWS modes have been disabled
or do not function because of an external or internal fault.
The ‘G/S CANCLD’ annunciator provides visual indication that the EGPWS Mode 5 function is inhibited.
Vendor Name Vendor P/N Description QTY UM
West Coast Spec. 90-81401-008 (1) 1 EA
West Coast Spec. 90-81401-009 (2) 1 EA
West Coast Spec. 90-81401-010 (3) 1 EA