DOC AIRBUS | AMM A320FOperational Check of the Master Chip Detector Remote Indication [CFMB]
TASK 79-00-00-200-001-A
Operational Check of the Master Chip Detector Remote Indication
Refer to the MPD TASK: 792000-C9
OPERATIONAL CHECK OF THE MASTER CHIP DETECTOR REMOTE INDICATION
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 79-00-00-941-071-A ** ON A/C NOT FOR ALL
Subtask 79-00-00-020-052-A ** ON A/C NOT FOR ALL
Subtask 79-00-00-410-063-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:38:52 UTC
Operational Check of the Master Chip Detector Remote Indication
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobRefer to the MPD TASK: 792000-C9
OPERATIONAL CHECK OF THE MASTER CHIP DETECTOR REMOTE INDICATION
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | JUMPER-WIRE |
| No specific | AR | MEGOHMMETER 100 MOHMS |
| No specific | AR | WARNING NOTICE(S) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2442) | engine oil |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 10 | O-RING | AIPC 79-21-50-01-090 |
| 10 | O-RING | AIPC 79-21-50-01-140 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 24-41-00-862-002-A | De-energize the Aircraft Electrical Circuits Supplied from the External Power |
| TASK 24-41-00-862-002-A-01 | De-energize the Aircraft Electrical Circuits Supplied from the APU |
| TASK 24-41-00-862-002-A-02 | De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2) |
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
| TASK 79-21-30-000-001-A | Removal of the Visual Indicator |
| TASK 79-21-30-000-002-A | Removal of the DPM Harness |
| TASK 79-21-30-400-001-A | Installation of the Visual Indicator |
| TASK 79-21-30-440-001-A | Resetting of the Visual Indicator |
| TASK 79-21-50-000-001-A | Removal of the Master Magnetic Chip Detector |
| TASK 79-21-50-400-001-A | Installation of the Master Magnetic Chip Detector |
Position of the Electrical Master Magnetic Chip Detector for ParticlesSubtask 79-00-00-941-071-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 79-00-00-010-074-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
B. Open the fan cowls doors (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
4. Procedure(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
Subtask 79-00-00-020-052-A ** ON A/C NOT FOR ALL
A. Remove the Electrical Master Chip Detector (EMCD) as follows:
(1) At the same time, push and turn the EMCD plug one quarter of a turn counterclockwise.
(2) Disengage the EMCD from its housing.
Subtask 79-00-00-280-054-A ** ON A/C NOT FOR ALL (1) At the same time, push and turn the EMCD plug one quarter of a turn counterclockwise.
(2) Disengage the EMCD from its housing.
B. Check of the Chip Detector System
PRE SB CFM 79-0014
(1) Check the functioning of the chip detector including visual indicator pop-out response.
(b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time less than one second).
(2) If the red pop-out indicator is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) No further action is required, do the step H. Install the EMCD.
(3) If the red pop-out is not extended:
(a) Do the EMCD system functional check step.
END OF PRE SB CFM 79-0014
Subtask 79-00-00-280-058-A ** ON A/C NOT FOR ALL PRE SB CFM 79-0014
(1) Check the functioning of the chip detector including visual indicator pop-out response.
NOTE: Visual indicator must be energized by 28 volt aircraft power only (Ref. AMM TASK 24-41-00-861-002).
(a) Bridge the gap between the 2 magnet poles with a metallic JUMPER-WIRE or any metallic piece for a minimum of one second. (b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time less than one second).
(2) If the red pop-out indicator is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) No further action is required, do the step H. Install the EMCD.
(3) If the red pop-out is not extended:
(a) Do the EMCD system functional check step.
END OF PRE SB CFM 79-0014
C. Check of the Chip Detector System
POST SB CFM 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
(1) Check the functioning of the chip detector including visual indicator pop-out response.
(b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time from ten to 45 seconds).
(2) If the red pop-out indicator is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) No further action is required, do the step H. Install the EMCD.
(3) If the red pop-out is not extended:
(a) Do the EMCD system functional check step.
END OF POST SB CFM 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
Subtask 79-00-00-280-055-A ** ON A/C NOT FOR ALL POST SB CFM 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
(1) Check the functioning of the chip detector including visual indicator pop-out response.
NOTE: Visual indicator must be energized by 28 volt aircraft power only (Ref. AMM TASK 24-41-00-861-002).
(a) Bridge the gap between the two magnet poles with a metallic JUMPER-WIRE or any metallic piece for a minimum of 45 seconds. (b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time from ten to 45 seconds).
(2) If the red pop-out indicator is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) No further action is required, do the step H. Install the EMCD.
(3) If the red pop-out is not extended:
(a) Do the EMCD system functional check step.
END OF POST SB CFM 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
D. EMCD System Functional Check
(1) Disconnect the EMCD connector from the interface connector.
(2) Do the EMCD functional check as follows:
(a) Set MEGOHMMETER 100 MOHMS to the ohm scale.
(b) Bridge the gap between the 2 magnet poles with a JUMPER-WIRE or any metallic piece.
(c) Do a check of continuity check between pins 1 and 2 of the EMCD connector.
(3) If there is not continuity:
(a) Replace EMCD (Ref. AMM TASK 79-21-50-000-001) (Ref. AMM TASK 79-21-50-400-001).
(4) If there is continuity:
(a) Re-install EMCD into its housing located on the lubrication unit (see step H. Install the EMCD).
(b) Do the visual indicator functional check step.
Subtask 79-00-00-280-056-A ** ON A/C NOT FOR ALL (1) Disconnect the EMCD connector from the interface connector.
(2) Do the EMCD functional check as follows:
(a) Set MEGOHMMETER 100 MOHMS to the ohm scale.
(b) Bridge the gap between the 2 magnet poles with a JUMPER-WIRE or any metallic piece.
(c) Do a check of continuity check between pins 1 and 2 of the EMCD connector.
(3) If there is not continuity:
(a) Replace EMCD (Ref. AMM TASK 79-21-50-000-001) (Ref. AMM TASK 79-21-50-400-001).
(4) If there is continuity:
(a) Re-install EMCD into its housing located on the lubrication unit (see step H. Install the EMCD).
(b) Do the visual indicator functional check step.
E. Visual indicator functional check
PRE SB CFM 79-0014
(2) Do a functional check of the visual indicator as follows:
(a) Close the circuit between pins 2 and 3 of the connector B receptacle with a JUMPER-WIRE for a minimum of one second.
(b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time less than one second).
(3) If the red pop-out is not extended:
(a) Replace the visual indicator (Ref. AMM TASK 79-21-30-000-001) (Ref. AMM TASK 79-21-30-400-001).
(4) If the red pop-out is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) Do the DPM electrical harness check step.
END OF PRE SB CFM 79-0014
Subtask 79-00-00-280-059-A ** ON A/C NOT FOR ALL PRE SB CFM 79-0014
NOTE: Visual indicator must be energized by 28 volt aircraft power only (Ref. AMM TASK 24-41-00-861-002).
(1) DPM electrical harness from the connector B receptacle on the visual indicator. (2) Do a functional check of the visual indicator as follows:
(a) Close the circuit between pins 2 and 3 of the connector B receptacle with a JUMPER-WIRE for a minimum of one second.
(b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time less than one second).
(3) If the red pop-out is not extended:
(a) Replace the visual indicator (Ref. AMM TASK 79-21-30-000-001) (Ref. AMM TASK 79-21-30-400-001).
(4) If the red pop-out is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) Do the DPM electrical harness check step.
END OF PRE SB CFM 79-0014
F. Visual Indicator Functional Check
POST SB 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
(2) Do a functional check of the visual indicator as follows:
(a) Close the circuit between pins 2 and 3 of the connector B receptacle with a JUMPER-WIRE for a minimum of 45 seconds.
(b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time from 10 to 45 seconds).
(3) If the red pop-out is not extended:
(a) Replace the visual indicator (Ref. AMM TASK 79-21-30-000-001) (Ref. AMM TASK 79-21-30-400-001).
(4) If the red pop-out is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) Do the DPM electrical harness check step.
END OF POST SB CFM 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
Subtask 79-00-00-280-057-A ** ON A/C NOT FOR ALL POST SB 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
NOTE: Visual indicator must be energized by 28 volt aircraft power only (Ref. AMM TASK 24-41-00-861-002).
(1) DPM electrical harness from the connector B receptacle on the visual indicator. (2) Do a functional check of the visual indicator as follows:
(a) Close the circuit between pins 2 and 3 of the connector B receptacle with a JUMPER-WIRE for a minimum of 45 seconds.
(b) Do a visual inspection of the visual indicator red pop-out, it must extend (extension time from 10 to 45 seconds).
(3) If the red pop-out is not extended:
(a) Replace the visual indicator (Ref. AMM TASK 79-21-30-000-001) (Ref. AMM TASK 79-21-30-400-001).
(4) If the red pop-out is extended:
(a) Do the resetting of the visual indicator (Ref. AMM TASK 79-21-30-440-001).
(b) Do the DPM electrical harness check step.
END OF POST SB CFM 79-0014 or POST SB CFM 79-0023 or POST SB CFM 79-0036
G. DPM electrical harness check
(1) Do a check of continuity of the DPM electrical harness as follows:
(a) Set a megohmmeter to the ohm scale.
(b) Do a continuity check between:
. pin 1 of DPM connector and pin 3 of INDCT-VIS connector
. pin 2 of DPM connector and pin 2 of INDCT-VIS connector
1 If there is not continuity:
a Replace the DPM electrical harness (Ref. AMM TASK 79-21-30-000-002) (Ref. AMM TASK 79-21-30-000-002).
2 If there is continuity:
a Reconnect the DPM electrical harness connectors on the visual indicator and the EMCD.
Subtask 79-00-00-420-055-A ** ON A/C NOT FOR ALL (1) Do a check of continuity of the DPM electrical harness as follows:
(a) Set a megohmmeter to the ohm scale.
(b) Do a continuity check between:
. pin 1 of DPM connector and pin 3 of INDCT-VIS connector
. pin 2 of DPM connector and pin 2 of INDCT-VIS connector
1 If there is not continuity:
a Replace the DPM electrical harness (Ref. AMM TASK 79-21-30-000-002) (Ref. AMM TASK 79-21-30-000-002).
2 If there is continuity:
a Reconnect the DPM electrical harness connectors on the visual indicator and the EMCD.
H. Install the Electrical Master Chip Detector as follows:
PRE CFM SB 72-0222
(2) Lubricate a new AIPC 79-21-50-01-090 O-RING (10) with engine oil (Material No.CP2442) .
END OF PRE CFM SB 72-0222
POST SB CFM 72-0222
(3) Lubricate a new AIPC 79-21-50-01-140 O-RING (10) with engine oil (Material No.CP2442) .
END OF POST CFM SB 72-0222
(4) Install the new O-ring (10) on the chip detector.
(5) Do a visual inspection of the back-up seal (20).
5. Close-upCAUTION:
THERE ARE 2 SOURCES OF EMCD INSTALLED ON CFM56-5B, PRE AND POST SB 72-0222. MAKE SURE THAT YOU INSTALL A NEW O-RING RELATED TO THE CORRECT SB.
(1) Remove and discard the O-ring (10). PRE CFM SB 72-0222
(2) Lubricate a new AIPC 79-21-50-01-090 O-RING (10) with engine oil (Material No.CP2442) .
END OF PRE CFM SB 72-0222
POST SB CFM 72-0222
(3) Lubricate a new AIPC 79-21-50-01-140 O-RING (10) with engine oil (Material No.CP2442) .
END OF POST CFM SB 72-0222
(4) Install the new O-ring (10) on the chip detector.
(5) Do a visual inspection of the back-up seal (20).
NOTE: The back-up seal is not an expendable part. It must not be removed unless damage is noticed. If damaged, replace the EMCD plug.
(a) Engage the electrical master chip detector in its housing and at the same time, push and turn one quarter of a turn clockwise to lock it in its housing. NOTE: Check that the red marks are aligned.
Subtask 79-00-00-410-063-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).
(4) De-Energize the Aircraft Electrical Circuits from the External Power (Ref. AMM TASK 24-41-00-862-002).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the WARNING NOTICE(S).
(4) De-Energize the Aircraft Electrical Circuits from the External Power (Ref. AMM TASK 24-41-00-862-002).