Honeywell

MK XXII EGPWS Installation Manual

aircraft that do not have another compatible source of outside air temperature. Outside Air Temperature is used by the EGPWS along with pressure altitude in computing Geometric Altitude. If Outside Air Temperature is not available, Geometric Altitude is computed using pressure altitude with a corresponding reduction in accuracy.

Geometric Altitude is computed by the EGPWS to reduce or eliminate errors potentially induced in corrected barometric altitude by temperature extremes, non-standard altitude conditions, and altimeter miss-sets. Geometric Altitude also allows continuous EGPWS operation in QFE environments without crew intervention.

1.5.5 Smart Cable (PCMCIA Interface)

The EGPWS Smart Cable (part number 951-0386-001) is a removable PCMCIA card interface. The Smart Card is compatible with any Honeywell supplied EGPWS PCMCIA style cards. The purpose of the Smart Cable in the EGPWS system is for upload of software and databases and also for download of EGPWS Flight History. The Smart Card loading operation will closely emulate that of an ARINC 615 Data Loader.

CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 060-4314-225

REV: C SHEET 20

Page 20
Image 20
Honeywell MKXXII installation manual Smart Cable Pcmcia Interface