Honeywell MKXXII installation manual Category 4 Altitude Callouts, Instructions

Honeywell

MK XXII EGPWS Installation Manual

3.3.4 Category 4 – Altitude Callouts

Category 4 defines the Altitude Callout menu choices and Smart ‘500’ Callout selection along with Autorotation callout enablement.

Appendix E Table E 3.1.4 defines the Altitude Callout Menu options and identifies the first MK XXII EGPWS version in which the option was available (see the Effectivity entry).

The Altitude callout menus have selected combinations of “Minimums-Minimums”, Smart “500”,

“200”, “100”, “50”, “40”, “30”, “20”, and “10”. Autorotation mode, and no altitude callouts may also be selected. Recommended selections are ID 133, 135 or 136.

NOTE: For applications that use Category 1 (Aircraft Type) ID 146, 147, 148 or 149, where autorotation will not be detected, it is strongly recommended that a callout menu be selected that provides, as a minimum, 200 and 100 feet such as ID 132 or 136.

The Altitude Callout menu provides altitude annunciation for descent below predefined altitudes (example: “One Hundred” is annunciated when descending through 100 feet radio altitude).

A Smart “500” foot callout is available that will issue a “500” callout when the aircraft is 500’ AGL. This callout is active only during non-precision approaches or when the Glideslope or Localizer deviation is greater than 2 dots.

“Minimums-Minimums” callout can be selected or deselected from these combinations by connecting or not connecting the Decision Height (DH) discrete (J1-33) of Category 8.

3.3.4.1 Instructions

1.Using Appendix E Table E 3.1.4 , select the preferred Altitude Callout Menu Type (ID) that matches the feature preferences and version (part number) being installed. Using table E 3.1.4 select ID number for your Altitude callouts and record that number on Table E 3 under Ident No. for step 4. This number will be used during programming of the configuration module.

2.If the “Minimums-Minimums” callout will be used, use the electrical interfaces (pin-outs) for Radio Altitude Input Select Type (Category 8) shown in Appendix E Table E 3.1.8-xto generate the installation wiring diagrams.

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