DOC AIRBUS | AMM A320FAnalyze Particles [CFMB]
TASK 79-00-00-281-005-A
Analyze Particles
1. Reason for the Job
This procedure gives instructions to examine the particles from the Electrical Master Chip Detector (EMCD), magnetic bar (OPTIONAL) and scavenge screen to identify the physical properties.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 79-00-00-941-079-A ** ON A/C NOT FOR ALL
Subtask 79-00-00-281-056-A ** ON A/C NOT FOR ALL
Subtask 79-00-00-410-072-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:38:57 UTC
Analyze Particles
1. Reason for the Job
This procedure gives instructions to examine the particles from the Electrical Master Chip Detector (EMCD), magnetic bar (OPTIONAL) and scavenge screen to identify the physical properties.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | WARNING NOTICE(S) |
| 856A2683G01 | 1 | CFMI SOFTWARE FOR MCD IDENTIFICATION |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-000-042-A | Removal of the Power Plant |
| TASK 71-00-00-000-042-A-01 | Removal of the Power Plant with the Engine Positioner TWW 75E (MIAG) |
| TASK 71-00-00-000-042-A-03 | Removal of the Power Plant with Jacxson Tool |
| TASK 71-00-00-400-042-A | Installation of the Power Plant |
| TASK 71-00-00-400-042-A-01 | Installation of the Power Plant with the Engine Positioner TWW 75E (MIAG) |
| TASK 71-00-00-400-042-A-03 | Installation of the Power Plant with Jacxson Tool |
| 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 72-62-00-000-002-A | Removal of the Transfer Gearbox Module |
| TASK 72-62-00-400-002-A | Installation of the Transfer Gearbox Module |
| TASK 72-63-00-000-003-A | Removal of the Accessory Gearbox Assembly |
| TASK 72-63-00-400-003-A | Installation of the Accessory Gearbox Assembly |
| TASK 79-00-00-281-006-A | Ground Run for Additional Particle Collection |
Shapes Particles examplesSubtask 79-00-00-941-079-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 79-00-00-010-084-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 79-00-00-281-056-A ** ON A/C NOT FOR ALL
A. Analyze Particles.
(a) Any quantity of material that is less than or equal to 0.004 in. (0.10 mm) in all dimensions is a serviceable condition.
(b) Refer to CFM NDT manual Part 10 "CFMI-TP.NT.11" or 856A2683G01 CFMI SOFTWARE FOR MCD IDENTIFICATION to identify the possible source or refer to
for examples of shapes that may be seen on a EMCD or on magnetic bar.
(c) Examine the magnetic particles.
1 Use a 10x hand-held magnifying lens and a magnetic bar to examine the magnetic particles for the material which is larger than 0.004 in. (0.10 mm) in any dimension:
2 Compare the magnetic particles found with the descriptions in
to identify the particles, their potential source from within the engine, and the recommendation. To identify the particles, take into consideration the sump from which the particles were found, their size and the physical descriptions in the Tables.
Following the recommendations of the Tables, do this tasks:
(d) Examine the non-magnetic particles.
1 Use a 10x hand-held magnifying lens to examine the non-magnetic particles for the material which is larger than 0.004 in. (0.10 mm) in any dimension:
2 Compare the non-magnetic particles found with the descriptions in
to identify the particles, their potential source from within the engine, and the recommendation. To identify the particles, take into consideration the sump from which the particles were found, their size and the physical descriptions in the Tables. Following the recommendations of the Tables, do this tasks:
(e) Analysis of Particles found following Ground Run for Additional Particle Collection (Ref. AMM TASK 79-00-00-281-006).
1 If no magnetic particles are found from this ground run on either the EMCD or the magnetic bars:
a Check EMCD/magnetic bars after each flight until the laboratory results are known.
b The optional magnetic bars may remain installed for 5-cycles or 25-hours.
c If you find magnetic particles greater than 0.004 in. (0.10 mm) on any check following these flights:
a Engine operation is limited to 5 flights until the laboratory results are known.
b The optional magnetic bars may remain installed for 5-cycles or 25-hours
c Check EMCD/magnetic bars after each flight until the laboratory results are known.
5. Close-upWARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Examine the particles from the EMCD, magnetic bar, if installed, and scavenge screen to identify the physical properties of the material (shape, size, quantity, magnetic properties, color) to be used in the following analysis. (a) Any quantity of material that is less than or equal to 0.004 in. (0.10 mm) in all dimensions is a serviceable condition.
(b) Refer to CFM NDT manual Part 10 "CFMI-TP.NT.11" or 856A2683G01 CFMI SOFTWARE FOR MCD IDENTIFICATION to identify the possible source or refer to
for examples of shapes that may be seen on a EMCD or on magnetic bar.
(c) Examine the magnetic particles.
1 Use a 10x hand-held magnifying lens and a magnetic bar to examine the magnetic particles for the material which is larger than 0.004 in. (0.10 mm) in any dimension:
2 Compare the magnetic particles found with the descriptions in
to identify the particles, their potential source from within the engine, and the recommendation. To identify the particles, take into consideration the sump from which the particles were found, their size and the physical descriptions in the Tables.
Following the recommendations of the Tables, do this tasks:
- Replace the engine (Ref. AMM TASK 71-00-00-000-042) and (Ref. AMM TASK 71-00-00-400-042)
- Replace the TGB (Ref. AMM TASK 72-62-00-000-002) and (Ref. AMM TASK 72-62-00-400-002)
- Replace the AGB (Ref. AMM TASK 72-63-00-000-003) and (Ref. AMM TASK 72-63-00-400-003).
NOTE: If magnetic particles cannot be identified, for further action refer to the Figure
3 The particles can be sent to a laboratory for material identification. After a laboratory has done the material identification, you can also use that information to further confirm the magnetic particles found. (d) Examine the non-magnetic particles.
1 Use a 10x hand-held magnifying lens to examine the non-magnetic particles for the material which is larger than 0.004 in. (0.10 mm) in any dimension:
2 Compare the non-magnetic particles found with the descriptions in
to identify the particles, their potential source from within the engine, and the recommendation. To identify the particles, take into consideration the sump from which the particles were found, their size and the physical descriptions in the Tables. Following the recommendations of the Tables, do this tasks:
- Replace the engine (Ref. AMM TASK 71-00-00-000-042) and (Ref. AMM TASK 71-00-00-400-042)
- Replace the AGB (Ref. AMM TASK 72-63-00-000-003) and (Ref. AMM TASK 72-63-00-400-003).
(e) Analysis of Particles found following Ground Run for Additional Particle Collection (Ref. AMM TASK 79-00-00-281-006).
1 If no magnetic particles are found from this ground run on either the EMCD or the magnetic bars:
a Check EMCD/magnetic bars after each flight until the laboratory results are known.
b The optional magnetic bars may remain installed for 5-cycles or 25-hours.
c If you find magnetic particles greater than 0.004 in. (0.10 mm) on any check following these flights:
- Continued operation is limited to 5-cycles or 25-hours until the laboratory analysis results are known.
a Engine operation is limited to 5 flights until the laboratory results are known.
b The optional magnetic bars may remain installed for 5-cycles or 25-hours
c Check EMCD/magnetic bars after each flight until the laboratory results are known.
Subtask 79-00-00-410-072-A ** ON A/C NOT FOR ALL