Honeywell MK VI - Manual (Page 54)

Honeywell
MK VI MK VIII EGPWS Installation Design Guide
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3.3 Category 1 - Aircraft / Mode Type Select
Category 1 specifies the general aircraft type, warning mode differences, bank angle alert curve, fixed or
retractable gear, and 3500 ft or 2000 ft min runway length (as an option for MK VIII EGPWS only).
Appendix E Tables 5.2 and 5.3.1 include some information required by MK VI/MK VIII EGPWS development
personnel and not pertinent to the installation design process. Only items relevant to the installation design
process are discussed in this document.
3.3.1 Aircraft / M ode Type
The Aircraft Type identifies the aircraft as GA Fast (Turboprop), GA Slow (Turboprop), or Bizjet (Turbofan). The
aircraft category defines configurable airspeed limits for mode expansion and gear and flaps stuck down
conditions (reasonable test) and also define the Mode 1, 2, 3, 4, & Bank Angle warning/alert curve options.
The MK VI EGPWS only supports aircraft types 0,1,2,3,4 that are designed for turboprop aircraft (and emulate
the mode curves of the MK VI GPWS). The MK VIII EGPWS has Aircraft types 254 & 255 that are designed for
turbofan aircraft (and emulate the mode curves of the MK V GPWS), along with aircraft types 0,1,2,3,4. Modes
1,2,3,&4 are different between these aircraft types. For reference compare the mode 1-4 turbofan curves to the
turboprop curves in the MK VI/VIII EGPWS Product Specification 965-1180-601.
Appendix E Table 5.3.1 lists the combinations of Aircraft/Mode Types, identifies the first MK VI/MK VIII EGPWS
version in which the option was available (see the Effectivity entry), and describes the options available with
each Aircraft/Mode type (see Description column).
3.3.2 Mode 1 typ e
Two Mode 1 alert curves are defined, GA (Turboprop) and Bizjet (Turbofan). The lower boundary of the GA
Mode 1 curves is 50 feet, the same lower boundary is extended to 10 feet for Bizjet aircraft.
3.3.3 Mode 2 typ e
Two Mode 2 alert curves are defined, one for GA Fast & Bizjet and one for GA Slow. Mode 2A airspeed
expansion increases the Mode 2 expanded alert area linearly from 1650 feet to 2450 feet for airspeeds of 220
knots to 310 knots in GA Fast and Bizjet defined aircraft (same as MK V and MK VII EGPWS). Mode 2 airspeed
expansion occurs for airspeeds from 190 knots to 280 knots in GA Slow defined aircraft.
MODE 2 AIRSPEED EXPANSION
GA FAST (Turboprop) 220 knots to 310 knots
GA SLOW (Turboprop) 190 knots to 280 knots
BIZJET (Turbofan) 220 knots to 310 knots