General - Inspection/Check of the Electrical Circuits and Equipment

TASK 24-00-00-200-003-A
General - Inspection/Check of the Electrical Circuits and Equipment

WARNING: MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT ELECTRICAL CIRCUITS. THERE IS A RISK OF ELECTROCUTION IF THE AC OR DC POWER STAYS CONNECTED.

1. Reason for the Job
The inspection/check procedure of electrical circuit includes two different operations:

A fast inspection, which includes a visual examination of all visible components without component removal.
A detailed inspection during which components are removed. Thus you can see the other components which are behind and do a detailed visual inspection of all components of the system.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
121AL, 811, 812, 822
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors

3. Job Set-up
Subtask 24-00-00-860-055-A

A. Aircraft Maintenance Configuration
(1) In the cockpit, put a WARNING NOTICE(S) in position to tell persons not to operate the pushbutton switches on the panels 35VU, 211VU and 115VU.
(2) Put a WARNING NOTICE(S) on the door 121AL to tell persons not to connect the external power receptacle.

Subtask 24-00-00-941-057-A

B. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at the doors 811, 812 and 822 of the electronics compartment and at the door 121AL which gives access to the external power receptacle.

Subtask 24-00-00-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 24-00-00-010-051-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 24-00-00-010-051-C ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

4. Procedure
Subtask 24-00-00-210-065-A

A. Fast Inspection
(1) Do a check of the general outer condition and attachment of these components:

Panels and their equipment
Electrical connectors
Rack-mounted system components
Indicators
Electrical bonding leads.

(2) Check the condition of all wiring (for signs of ageing, alteration, overheating, scaling and deformation which can cause a decrease of wiring performance).
(3) Replace defective components.

Subtask 24-00-00-210-066-A

B. Detailed Inspection
(1) Open ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE and casings, remove or open panels and shields and, if necessary, remove components which are in front of other components, to gain access to wiring, plugs, electrical connections and the different system components.
(2) Components
(a) Remove dust with a vacuum cleaner and clean other dirt if necessary.
(b) Do a check of labels and their identification.
(c) Do a check of attachment and general condition of components.
(3) Wiring
(a) Do a check of identification sleeves or labels protective coatings, insulation and protective fittings for correct condition.
(b) Do a check of the condition of wiring (for signs of ageing, alteration, overheating, scaling and deformation which can cause a decrease of wiring performance).
(4) Electrical connectors
(a) Disconnect plugs, do a check of their physical and electrical condition. Make sure that there are no signs of oxidation or corrosion, replace defective components (seals, gaskets, grommets, ferrules etc...).
(b) Do a check of the tightness of connections to all electrical accessories, ground bonding leads, ground leads, busbars and terminal bars.
(c) Do a check of tightness of non-safetied connectors.
(d) Do a check of the condition of electrical connector protections in the hydraulics compartment.

Subtask 24-00-00-020-053-A

C. Replacement of the Defective Components
(1) Replace defective components.

Subtask 24-00-00-420-053-A

D. Installation of the Removed Components
(1) Install removed components and put back all equipment in operating condition.

5. Close-up
Subtask 24-00-00-410-057-A

A. Close the access doors 811 812 822 121AL.

Subtask 24-00-00-410-058-A ** ON A/C NOT FOR ALL

B. Close Access
(1) 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

Subtask 24-00-00-410-058-B ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 24-00-00-410-058-C ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 24-00-00-942-054-A

C. Put the aircraft back to its initial configuration.
(1) Remove the WARNING NOTICE(S).
(2) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:19:21 UTC