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3. System Description
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A. Reporting Function Each ADIRS BITE message is described in the following pages, with the corresponding fault description and the consequences on the system and in the cockpit.
(1)
General
-IR and ADR faults are classified as follows: . class 1: faults with cockpit effect . class 2: non-critical faults . class 3: minor faults without cockpit effects.
-use of indexes in BITE messages: ADIRUi stands for ADIRU 1, ADIRU 2 or ADIRU 3.
-ECAM messages: . xxx stands for CAPT or F/O, depending on the ADIRU side (1 or 2) . the letter in parentheses indicates the color used to display the text: (A) Amber, (C) Cyan and (W) White.
-IR FAULT: the FAULT legend of the IR pushbutton switch flashes in NAV mode and is steady in ATT mode.
(2)
Inertial reference faults
(Ref. Fig. 002, 003, 004, 005, 006, 007, 008)
**ON A/C 204-228,
R
(Ref. Fig. 008A)
R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,
(Ref. Fig. 009)
Some IR faults resulting in warnings (fault annunciation, invalid
outputs) are due to an incorrect operational use of the system and
not to a system fault.
These tests are:
-align in air
-position-entry (comparison with the last stored position and computed latitude).
-Test on motion.
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ADIRS BITE - Inertial Reference System - Class 1 Internal Faults 1/5
Figure 002
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ADIRS BITE - Inertial Reference System - Class 1 Internal Faults 2/5
Figure 003
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ADIRS BITE - Inertial Reference System - Class 1 Internal Faults 3/5
Figure 004
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ADIRS BITE - Inertial Reference System - Class 1 Internal Faults 4/5
Figure 005
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ADIRS BITE - Inertial Reference System - Class 1 Internal Faults 5/5
Figure 006
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ADIRS BITE - Inertial Reference System - Class 1 External Faults
Figure 007
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ADIRS BITE - Inertial Reference System - Class 3 Faults
Figure 008
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