Inspection of the Master Magnetic Chip Detector [IAE]

TASK 79-00-00-200-014-A
Inspection of the Master Magnetic Chip Detector

WARNING: DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

CAUTION: DO NOT LET ENGINE FUEL OR OIL FALL ON THE ENGINE. UNWANTED FUEL OR OIL MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

ZONE: 400

1. Reason for the Job
This TASK gives instructions on how to check the master magnetic chip detectors (MCDs) for debris and to check oil condition.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437CL
FOR [1000EM2] (ENGINE-2)
447CL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-13-79-610-010-A	Drain the Engine Oil System
TASK 12-13-79-610-011-A	Check Oil Level and Replenish
TASK 12-13-79-610-012-A	Prime the Engine Oil System
TASK 12-32-79-600-010-A	Sampling of the Engine Oil for Analysis
TASK 29-11-51-000-010-A	Removal of the Engine Pump
TASK 29-11-51-400-010-A	Installation of the Engine Pump
TASK 71-00-00-700-013-A	Procedure to Dry Out the High Pressure Turbine (HPT) after Oil Contamination
TASK 71-00-00-710-043-A	Normal Engine Automatic-Start Procedure
TASK 71-00-00-710-047-A	Normal Engine Manual-Start Procedure
TASK 71-73-49-200-010-A	Inspection of the Oil, Hydraulic and Water Drain Tubes
TASK 72-50-00-200-010-A	Inspection of the Turbine Exhaust Case
TASK 72-50-50-100-010-B	Cleaning of No. 5 Bearing Oil Service Lines, Filter and Oil Jet
TASK 72-60-23-000-010-A	Removal of the Hydraulic Pump Drive Seal Assembly and Mating Ring
TASK 72-60-23-400-010-A	Installation of the Hydraulic Pump Drive Seal Assembly Mating Ring
TASK 75-22-00-200-010-A	General Visual Inspection of the No 4 Bearing Cooling Air Tubes for Damage and Security and of the No 4 Bearing Cooler and Associated Inlet in the Left ...
TASK 79-00-00-200-011-A	Inspection of the Magnetic Chip Detectors for Debris
TASK 79-00-00-200-012-A	Inspection of the Oil Filters
TASK 79-00-00-200-013-A	Check Master Magnetic Chip Detector for Evidence of Metallic Debris
TASK 79-20-00-200-010-A	General Visual Inspection of the Oil Distribution System Components, Tubes and Joints
TASK 79-21-44-000-010-A	Removal of the Pressure Oil Filter Element
TASK 79-21-44-400-010-A	Installation of the Pressure Oil Filter Element
TASK 79-22-44-000-010-A	Removal of the Scavenge Oil Filter Element
TASK 79-22-44-400-010-A	Installation of the Scavenge Oil Filter Element
TASK 79-22-45-000-010-A	Removal of the Magnetic Chip Detector
TASK 79-22-45-400-010-A	Installation of the Magnetic Chip Detector
Master Magnetic Chip Detector
Oil Condition Diagnostics
ACOC Duct Seal Location

3. Job Set-up
Subtask 79-00-00-941-063-A ** ON A/C NOT FOR ALL

A. On the panel 115VU:
(1) Put a WARNING NOTICE(S) to tell persons not to start the engine 1(2).

Subtask 79-00-00-941-064-A ** ON A/C NOT FOR ALL

B. On the panel 50VU:
(1) Make sure that the ON legend of the ENG/FADEC GND PWR pushbutton switch is off.
(a) Install a WARNING NOTICE(S).

4. Procedure
Subtask 79-00-00-010-062-A ** ON A/C NOT FOR ALL

A. Get access to the Master Magnetic Chip Detector (MCD)
(1) To get access to the master MCD, open the inspection door on the left fan cowl

Master Magnetic Chip Detector ** ON A/C NOT FOR ALL

(a) FOR [1000EM1] (ENGINE-1)
437CL
(b) FOR [1000EM2] (ENGINE-2)
447CL

Subtask 79-00-00-010-063-A ** ON A/C NOT FOR ALL

B. Remove the Master MCD

Master Magnetic Chip Detector ** ON A/C NOT FOR ALL

(1) Remove the MCD (Ref. AMM TASK 79-22-45-000-010)

Subtask 79-00-00-210-073-A ** ON A/C NOT FOR ALL

C. Inspect the MCD for metallic debris.
(1) Metallic debris not found, return engine to service.
(2) Metallic debris found, inspect all MCD's (Ref. AMM TASK 79-00-00-200-011) and Oil Filter (Ref. AMM TASK 79-00-00-200-012).

Subtask 79-00-00-420-054-A ** ON A/C NOT FOR ALL

D. Install the Master MCD
(1) Install clean MCDs (Ref. AMM TASK 79-22-45-400-010).

Subtask 79-00-00-210-074-A ** ON A/C NOT FOR ALL

E. Examine the Condition of the Engine Oil
(1) Visual inspection of oil:

NOTE: The color of new oil can be different between oil brands. Some oil brands are dark when delivered as new. In general, the oil color will get darker with engine operation. If oil appears opaque (non-transparent), it may be a sign that suspended carbon particles are present in the oil. This is not cause for rejection.

(a) Does oil appear to be thicker or thinner (viscosity) than new oil (of same brand or type)? This could be a sign of oil contamination by hydraulic fluid or fuel or excessive heat causing physical property changes in the oil.
(b) Check oil filters and MCDs for contamination (Ref. AMM TASK 79-00-00-200-012), (Ref. AMM TASK 79-00-00-200-011) and (Ref. AMM TASK 79-00-00-200-013) (if not previously done in subtask 79-00-00-210-073). If any metallic debris is found in the filters, perform fault isolation (follow AMM task instructions).
(c)

Oil Condition Diagnostics ** ON A/C NOT FOR ALL

(2) Chemical and physical testing of the oil
(a) TAN - TAN is an acronym for "total acid number" and gives an indication if oil has been exposed to elevated temperature.
(b) Kinematic Viscosity - A measure of oil resistance to flow. Oil must be within a certain range to do its job properly.
(c) Hydraulic fluid - Whether introduced accidentally into the oil system or by way of a hydraulic pump leak, it can have a significant negative impact on viscosity.
(d) Water contamination - Elevated water contamination in the oil can result in corrosion of certain alloys leading to harmful deposits.

WARNING: DO NOT REMOVE THE FILLER CAP OF THE OIL TANK IMMEDIATELY AFTER ENGINE OPERATION. LET THE OIL PRESSURE DECREASE FOR A MINIMUM OF 5 MINUTES AFTER THE ENGINE SHUTDOWN. IF YOU OPEN THE FILLER CAP WHEN THERE IS PRESSURE IN THE TANK, THE OIL CAN BURN YOU DANGEROUSLY.

(3) Taking an oil sample
(a) Obtain an oil sample for analysis (Ref. AMM TASK 12-32-79-600-010). A sample of 8 oz (0.23 kg) should be sufficient.

NOTE: Oil sample should be taken within 12 flight hours of initial observation of unusual oil condition, provided no oil system fault indications (Electronic Centralized Aircraft Monitoring-ECAM) are displayed. If oil system-related ECAM message is displayed, follow related AMM/TSM instructions before proceeding with this task.

NOTE: It is recommended that an equal quantity of new (unused) oil of same brand or type also be submitted to allow for direct comparison to aid with interpretation of results.

(b) When the oil sample is taken, also perform the following:
1 Examine No.4 bearing air cooler (ACAC) and tubes for blockage/damage (Ref. AMM TASK 75-22-00-200-010).
2 Examine the Air Cooled Oil Cooler (ACOC) for cracks, leaks, duct blockage or loose connections (Ref. AMM TASK 79-20-00-200-010).
3

ACOC Duct Seal Location ** ON A/C NOT FOR ALL

4 Check No.4 bearing compartment scavenge valve (Ref. AMM TASK 79-20-00-200-010), including HPC stage 10 make-up air connections at scavenge valve.
5 Examine Fuel Cooled Oil Cooler (FCOC) for leaks (Ref. AMM TASK 79-20-00-200-010).
6 After oil sample is taken, double flush oil system per step B.(5).
(4) Submit oil sample for the following testing:
(a) Total Acidity Number (TAN) given as mg KOH /g. TAN limit is no more than 2.0 mg KOH/g.
(b) Kinematic viscosity. Limits are +25 percent/-10 percent compared to new oil of same brand, type and weight. See inspection method at 104 deg.F (40.00 deg.C), ASTM D445/MIL PRF-23669.
(c) Hydraulic fluid contamination. Limit contamination is less than or equal to 0.1 percent (Ref. ASTM- D1091).
(d) Water contamination. Limit contamination is less than 1000 ppm water (Ref. Karl Fisher test, ASTMD-6304-04ae1).
(5) Double flush the oil system as follows:
(a) Completely drain the oil system (Ref. AMM TASK 12-13-79-610-010).
(b) Check oil filters for contamination (Ref. AMM TASK 79-00-00-200-012) and disposition any findings (follow task AMM instructions).
(c) Clean or replace the pressure filter (Ref. AMM TASK 79-21-44-000-010), (Ref. AMM TASK 79-21-44-400-010) and (Ref. AMM TASK 79-00-00-200-012).
(d) Replace the scavenge filter (Ref. AMM TASK 79-22-44-000-010) and (Ref. AMM TASK 79-22-44-400-010).
(e) Clean any viscous deposits from the filter housing and ports.
(f) Examine the MCDs ( (Ref. AMM TASK 79-00-00-200-013) and (Ref. AMM TASK 79-00-00-200-011)) and disposition any findings (follow task AMM instructions). Clean off the MCDs and re-install.
(g) Fill the oil system with the new engine oil (Ref. AMM TASK 12-13-79-610-010), (Ref. AMM TASK 12-13-79-610-011) and (Ref. AMM TASK 12-13-79-610-012).

NOTE: A half-full tank is sufficient enough to flush the oil system, use approximately 20 US quarts of oil.

(h) Operate the engine at ground idle for 10 minutes (Ref. AMM TASK 71-00-00-710-043), (Ref. AMM TASK 71-00-00-710-047).
(i) Completely drain the oil system (Ref. AMM TASK 12-13-79-610-010).
(j) Inspect the MCDs and disposition any findings (Ref. AMM TASK 79-00-00-200-013) and (Ref. AMM TASK 79-00-00-200-011). Clean the MCDs and re-install.
1 Inspect the pressure filter and disposition any findings (Ref. AMM TASK 79-00-00-200-012).
2 Inspect the scavenge filter and disposition any findings (Ref. AMM TASK 79-00-00-200-012).

NOTE: If any metallic debris is found on the MCDs or oil filters, perform fault isolation (follow task AMM instructions).

(k) Fill the oil system with new engine oil (Ref. AMM TASK 12-13-79-610-010), (Ref. AMM TASK 12-13-79-610-011) and (Ref. AMM TASK 12-13-79-610-012).

CAUTION: DO NOT DRY-MOTOR THE ENGINE. RUN THE ENGINE TO GET CORRECT OIL LEVEL INDICATIONS. IF YOU DO NOT OBEY THESE INSTRUCTIONS, OVER-SERVICING CAN OCCUR.

(l) Do an engine ground idle oil system leak check (Ref. AMM TASK 71-00-00-710-043) and (Ref. AMM TASK 71-00-00-710-047).
(m) Inspect the scavenge and pressure filter and disposition any findings (Ref. AMM TASK 79-00-00-200-012). If actionable findings are present, repeat double flush per 4.B.(5)(a) to 4.B.(5)(m). If no actionable findings, reinstall filters and continue to 4.B.(5)(n).
(n) Inspect the (MCDs) and dispositon any findings (Ref. AMM TASK 79-00-00-200-013), (Ref. AMM TASK 79-00-00-200-011). If actionable findings are present, repeat double flush per step 4.B.(5)(b) to 4.B.(5)(m). If no actionable findings, re-install MCDs and continue to step 4.B.(5)(o).
(o) Fill the oil system to a maximum level within 30 minutes of engine shutdown.
(6) Oil sample laboratory results

NOTE: It is recommended that a maximum fly-on of 24 flight hours be observed while waiting for oil sample results, provided no oil system fault indications (ECAM) are displayed. If oil system-related ECAM message is displayed follow related AMM/TSM instructions before proceeding with this task.

(a) If the results from all 4 of the oil tests are within limits, the engine may continue in service with re-oil sample per step 4.B.(3)(a) and analysis per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.
(b) If TAN exceeds limit:
1 Examine No.5 bearing compartment and oil service tubes (Ref. AMM TASK 72-50-50-100-010).
2 Repeat oil sample per step 4.B.(3)(a) and tests per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.
a If all results are within limits, perform sample per step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.
b If results are not within limits, double flush per step 4.B.(5) and repeat sample per step 4.B.(3)(a) and analysis per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.

If repeat analysis still shows TAN above limit, remove engine for shop visit.
If all results are within limits, perform sample per step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.

(c) If kinematic viscosity is not within limits:
1 Repeat oil sample per step 4.B.(3)(a) and tests per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.
a If all results are within limits, perform sample per step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.
b If results are not within limits double flush per step 4.B.(5) and repeat sample per step 4.B.(3)(a) and analysis per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.

If repeat analysis still shows viscosity out of limits, remove engine for shop visit.
If all results are within limits, perform sample per step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.

(d) If hydraulic fluid contamination exceeds limit:
1 Examine the hydraulic pump drain pad line for blockage and clean if necessary (Ref. AMM TASK 71-73-49-200-010). Check for hydraulic fluid leakage. If not present, continue to 4.B.(6)(d).3_.
2 Remove/Replace the hydraulic pump (Ref. AMM TASK 29-11-51-000-010) and (Ref. AMM TASK 29-11-51-400-010) and hydraulic pump drive gear shaft seal (Ref. AMM TASK 72-60-23-000-010) and (Ref. AMM TASK 72-60-23-400-010), NMSB 72-0288.
3 Repeat oil sample per step 4.B.(3)(a) and tests per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.
a If all results are within limits, perform sample per step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.
b If results are not within limits, double flush per step 4.B.(5) and repeat sample per step 4.B.(3)(a) and analysis per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.

If repeat analysis still shows hydraulic fluid contamination above limit, remove engine for shop visit.
If all results are within limits, perform sample per step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.

(e) If water contamination exceeds limit:
1 Repeat oil sample per step 4.B.(3)(a) and tests per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.
a If all results are within limits, perform sample per step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.
b If results are not within limits, double flush per step 4.B.(5) and repeat sample per step 4.B.(3)(a) and analysis per step 4.B.(4) and step 4.B.(6) within 50-75 hours flight time.

If repeat analysis still shows water contamination above limit, remove engine for shop visit.
If all results are within limits, perform sample step 4.B.(3)(a) and analysis again per step 4.B.(4) and step 4.B.(6) after 600 flight hour interval.

NOTE:

Oil Condition Diagnostics ** ON A/C NOT FOR ALL

Subtask 79-00-00-210-093-A ** ON A/C NOT FOR ALL

F. Inspection of the Turbine Exhaust Case for Oil
(1) Visually inspect the TEC for oil that came out of the No. 4 bearing weep tube port (Ref. AMM TASK 72-50-00-200-010).
(2) If there is oil, do the Procedure to Dry Out the High Pressure Turbine After Oil Contamination (Ref. AMM TASK 71-00-00-700-013).

[Rev.10 from 2021] 2026.04.02 07:44:49 UTC