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SUBJECT: CENTRALIZED FAULT DISPLAY SYSTEM (CFDS) ANOMALIES
ATA CHAPTER: 00
AIRCRAFT TYPE: A318, A319, A320, A321
APPLICABILITY: All A318, A319, A320, A321
REFERENCES: Not applicable
1. PURPOSE
The present SIL identifies all the known CFDS anomalies/BITE deviations. It is intended to be used by
maintenance engineering as a synthetic document, providing a short description of each deviation, as well
as the affected part and the corrective action, with a cross-reference to the relevant TFU/TSM procedure.
The fault messages/warnings or behaviors that should be known by line maintenance teams are covered
by the Trouble Shooting Manual.
More precisely, the messages/behaviors described in this SIL are those for which the conditions of
occurrence are precise/known and reproducible. In addition are mentioned messages/behaviors for which
a statistical survey revealed a too high number of occurrences (more than 1 every 5 flights per aircraft
without any logbook complaint).
The last part of this SIL (Appendix E) gives the filter content.
Each operator is responsible for uploading and updating the filter database, according to the part numbers
of equipment fitted on their aircraft.
This revision introduces updated data with the appendixes. Changes in subject SIL are highlighted by a
vertical revision bar in the left of the respective page.
2. DESCRIPTION
This part of the SIL describes the appendix included in the present SIL.
Airbus has updated the CFDS BITE anomalies according the below layout.
The appendix is divided into five parts, which are:
A. The list of PFR failure messages (internal and external) which request specific maintenance action.
B. The list of ECAM WARNINGS and MAINTENANCE STATUS shown on the PFR, which request
specific maintenance action.
C. The list of CLASS 3 failure messages which request specific maintenance action.
D. The anomalies related to the general use of the CFDS.
E. The list of messages/warnings which AIRBUS recommends to filter.
Note 1: The classification criteria of data recorded in parts A, B, C, D, E of this document is the ATA
chapter associated to the message/anomaly.
Each page of parts A, B, C, D indicates:
1. The ATA chapter of the message or anomaly.
2. The description of the message which is considered as non justified under some conditions.
3. Specific maintenance action to be performed or some remarks about the anomaly.
4. The computer affected by the anomaly.
5. The Part Number (PN) of the affected computer.
6. The corrective PN.
7. The reference of the TFU/TSM to obtain more details about the anomaly.
8. The indication whether Airbus recommends (Y) or not (N) to filter a message/warning.
Note 2: New/revised items are highlighted by a vertical adjacent “NEW” or “R” in the margin (except for
Part E: refer to Part A and B).
Note 3: Lower-case letters such as “i” or ”j” represent a variable integer (usually 1, 2, or 1 to 3).
“i” and “j” are used in the messages.
“X” represents any alphanumeric character in the part numbers
Note 4: For each item, carefully check that the part number fitted on your aircraft corresponds to the affected
PN mentioned in the SIL. Otherwise, the remark is not applicable to your A/C.
Each page of part E indicates:
1. The ATA chapter of the message or warning to be filtered if applicable.
2. The first line of the message or warning to be filtered if applicable.
3. The second line of the message or warning to be filtered if applicable.
4. The Flight phase criteria if applicable.
5. The source criteria if applicable.
6. The PN which is concerned by the anomaly.
7. The name of the part which is concerned by the anomaly.
Note 5: A character “_” means that a space has to be entered by the operator when creating a filter item
manually through MFT.
Note 6: CFDIU specificity:
To prevent duplication of messages in the filter content, a character “$” is used instead of the position
number where the computer is installed i.e. VHF $ instead of VHF 1, VHF 2, VHF 3. This character must
not be used for the ATA digits neither for the Source name.
Note 7: Anytime the PN of a computer is changed on the A/C, it is recommended to update the filter content,
using information which are in Part E of this SIL. |
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