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MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 266
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31 - INDICATING/RECORDING SYSTEMS
31-32-00 CFDS: FAILURE CLASSIFICATION
CONTENTS:
Class 1
Class 2
Class 3
Synthesis
Self Examination
TMUCFDQ01 LEVEL 1
EFFECTIVITY 31-32-00 Page 1
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 267
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CFDS: FAILURE CLASSIFICATION
CLASS 1
Class 1 failures have an operational consequence on
the flight.
You can display the class 1 failures on the
Multipurpose Control and Display Unit (MCDU):
- in the LAST (or CURRENT) LEG REPORT.
- in the LAST (or CURRENT) LEG ECAM REPORT.
Refer to the Minimum Equipment List (MEL):
"GO", "GO IF" or "NO GO".
TMUCFDQ01-T01 LEVEL 1
EFFECTIVITY 31-32-00 Page 2
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 268
ALL
CFDS: FAILURE CLASSIFICATION - CLASS 1
TMUCFDQ01-P01 LEVEL 1
EFFECTIVITY 31-32-00 Page 3
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 269
ALL
CFDS: FAILURE CLASSIFICATION
CLASS 2
Class 2 failures have no immediate operational
consequence and can be displayed on request on the
ECAM STATUS page, under the MAINTENANCE title.
You can display the class 2 failures on the MCDU:
- in the LAST (or CURRENT) LEG REPORT.
- in the LAST (or CURRENT) LEG ECAM REPORT.
A class 2 failure has to be repaired within 10 days.
Refer to the MEL: "GO" without condition.
The example given here concerns a single smoke detector
fault in the Smoke Detection Control Unit (SDCU).
TMUCFDQ01-T02 LEVEL 1
EFFECTIVITY 31-32-00 Page 4
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 270
ALL
TMUCFDQ01-P02 LEVEL 1
CFDS: FAILURE CLASSIFICATION - CLASS 2
EFFECTIVITY 31-32-00 Page 5
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 271
ALL
CFDS: FAILURE CLASSIFICATION
CLASS 3
Class 3 failures have no operational consequence. All
aircraft systems remain available.
You can display the name of the systems affected by
at least a class 3 failure in the AVIONICS STATUS.
Do not refer to the MEL.
Class 3 failures have no fixed time for correction.
However, correction is recommended to improve the
dispatch reliability.
TMUCFDQ01-T03 LEVEL 1
EFFECTIVITY 31-32-00 Page 6
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 272
ALL
CFDS: FAILURE CLASSIFICATION - CLASS 3
TMUCFDQ01-P03 LEVEL 1
EFFECTIVITY 31-32-00 Page 7
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 273
ALL
CFDS: FAILURE CLASSIFICATION
SYNTHESIS
Class 1 and 2 failures are displayed in the LAST (or
CURRENT) LEG REPORT and in the LAST (or CURRENT) LEG
ECAM REPORT.
AVIONICS STATUS displays, on ground, the title of the
systems currently affected by any failure class.
TMUCFDQ01-T04 LEVEL 1
EFFECTIVITY 31-32-00 Page 8
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 274
ALL
CFDS: FAILURE CLASSIFICATION - SYNTHESIS
TMUCFDQ01-P04 LEVEL 1
EFFECTIVITY 31-32-00 Page 9
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 275
ALL
SELF EXAMINATION
Which action must be taken by maintenance personnel
when a class 1 failure affects an aircraft system?
A - Refer to the MEL to know if the failure
is a GO, NO GO or GO IF item.
B - Do not refer to the MEL.
C - Nothing as the failure can be left
uncorrected until the next scheduled
maintenance check.
When does a class 3 failure have to be corrected?
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