chapter  19
4 FMCS operation
Pages 4

CDU page is an indication of how many sub-

pages are available per selected function.

19.4.1 Identification page (‘IDENT’)

This page is automatically displayed upon power-

up; aside from displaying a familiar page each

time the system is used, this also serves as

confirmation that the FMC has passed a sequence

of built-in test equipment (BITE) self-tests

including: memory device checks, interface

checks, program pin configuration, power

supplies, software configurations and

microprocessor operation. Information displayed

on this page includes aircraft and engine types,

navigation database references and the

operational program number. By reference to the

contained within the company route. All other

entries on the page are optional; entry of data in

these fields will enhance system performance.