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- Aircraft in dangerous configuration or limit
flight conditions (STALL, OVERSPEED).
- System failure altering flight safety (ENGINE
FIRE, EXCESS CABIN ALT)
- Serious system failure (DUAL HYDRAULIC
FAILURE).
LEVEL 2
Level 2 corresponds to an abnormal configuration.
Immediate crew awareness is required, but not immediate
corrective action. The crew must decide when to take
the corrective action.
These warnings are associated with:
- Single chime,
- Master Caution light amber,
- Warning messages on CRT.
The level 2 system failure has no direct consequence
on flight safety.
TMUEISR01-T01 LEVEL 3
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ALERT CLASSIFICATION (CONTINUED)
LEVEL 1
Level 1 corresponds to a configuration requiring crew
monitoring, mainly failures leading to a loss of
redundancy or degradation of a system.
The attention getters (lights and sounds) are not
activated by a level 1 alert.
STATUS
Some defects which do not trigger warnings or cautions,
but which require further maintenance actions, will
be indicated to the crew by means of a status
indication, pulsing after engine shutdown.
It is necessary to call the status page manually to
see the title of the affected system.
TMUEISR01-T02 LEVEL 3
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TYPE OF FAILURE
GENERAL
The failures may be of three different types,
independently of their classification.
There are 3 separate types of warnings or cautions:
- those associated with an independent failure,
- those associated with a primary failure,
- those associated with a secondary failure.
INDEPENDANT FAILURE
An independent failure is a failure which affects an
isolated item of equipment or system without affecting
another one.
Example : Flight Warning Computer 1 failure.
Note: an independent failure is displayed with the
title underlined.
PRIMARY FAILURE
A primary failure is a failure of an item of equipment
or system causing the loss of other equipment.
Example: Green Hydraulic System failure may lead to
the loss of a pair of spoilers.
Note: a primary failure is displayed with a box around
the failure
SECONDARY FAILURE
A secondary failure is a loss of an item of equipment
or system resulting from a primary failure.
Example: loss of a pair of spoilers after an hydraulic
system failure.
The titles of the system pages corresponding to the
secondary failures are indicated on the lower right
part of the E/WD by an asterisk.
Note: this part can be used if necessary to display
heading titles of warnings if the left part of
the E/WD is full.
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ADVISORY
The value of some critical system parameters is
monitored by an advisory mode.
When the value drifts from its normal range, the
corresponding SYSTEM page is displayed automatically
and the affected parameter pulses.The corresponding
key light on the ECAM Control Panel is on.
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