Detailed Inspection of EWIS Installed in the Upper Forward Pylon (EWIS)

TASK 24-92-00-220-001-A
Detailed Inspection of EWIS Installed in the Upper Forward Pylon (EWIS)

ZONE: 413
ZONE: 414
ZONE: 423
ZONE: 424

1. Reason for the Job
Refer to the MPD TASK: 200413-01
DETAILED INSPECTION OF EWIS INSTALLED IN THE UPPER FORWARD PYLON (EWIS)
Refer to the MPD TASK: 200413-03
DETAILED INSPECTION OF EWIS INSTALLED IN THE UPPER FORWARD PYLON (EWIS)

NOTE: This is an EWIS (Electrical Wiring Interconnection System) procedure. EWIS is defined in ESPM 20-33-11.

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	FLASHLIGHT
No specific	AR	MIRROR - INSPECTION, FLEXIBLE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
413	UPPER FWD PYLON
414	UPPER FWD PYLON
423	UPPER FWD PYLON
424	UPPER FWD PYLON
FOR [1000EM1] (ENGINE-1)
413AL, 413BL, 413CL, 414AZ
413DL, 413EL, 414AR, 414BR, 414CR, 414FR
413AR, 413BR, 413CR, 413DT, 471AL, 471AR
FOR [1000EM2] (ENGINE-2)
423AL, 423AZ, 423BL, 423CL
423DL, 423FL, 424AR, 424BR, 424CR, 424ER
423AR, 423BR, 423CR, 423DT, 481AL, 481AR

C. Referenced Information

REFERENCE	DESIGNATION
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 54-52-11-000-001-A	Removal of the Pressure Relief Doors
TASK 54-52-11-000-002-A	Removal of the Access Panels
TASK 54-52-11-000-002-B	Removal of the Access Panels
TASK 54-52-11-400-001-A	Installation of the Pressure Relief Doors
TASK 54-52-11-400-002-A	Installation of the Access Panels
TASK 54-52-11-400-002-B	Installation of the Access Panels
TASK 54-53-11-000-002-A	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-A	Installation of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
ESPM 2052120
AWM 940801
AWM 940802
Upper Forward Pylon - Access Panels ** ON A/C NOT FOR ALL
Upper Forward Pylon - Inspection Area - Zones 413-414-423-424
Upper Forward Pylon - Access Panels ** ON A/C NOT FOR ALL
Upper Forward Pylon - Access Panels ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 24-92-00-941-054-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:

Put a WARNING NOTICE(S) in position 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:

Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

(4) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).

Subtask 24-92-00-862-070-A ** ON A/C NOT FOR ALL

B. Make sure that the aircraft electrical circuits are de-energized
(Ref. AMM TASK 24-41-00-862-002).

Subtask 24-92-00-010-080-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the upper forward pylon.
(2) Remove these access panels (Ref. AMM TASK 54-52-11-000-001), (Ref. AMM TASK 54-52-11-000-002) and (Ref. AMM TASK 54-53-11-000-002):
(a) FOR [1000EM1] (ENGINE-1)

413AL 413BL 413CL 413DL 413EL 414AR 414AZ 414BR 414CR 414FR.

(b) FOR [1000EM2] (ENGINE-2)

423AL 423AZ 423BL 423CL 423DL 423FL 424AR 424BR 424CR 424ER.

Subtask 24-92-00-010-080-C ** ON A/C NOT FOR ALL

413AL 413AR 413BL 413BR 413CL 413CR 413DT 414AZ 471AL 471AR.

(b) FOR [1000EM2] (ENGINE-2)

423AL 423AR 423AZ 423BL 423CL 423DT 423BR 423CR 481AL 481AR.

4. Procedure
Subtask 24-92-00-220-051-A ** ON A/C NOT FOR ALL

A. Detailed Inspection of All the Wiring Installed in the Upper Forward Pylon
(1) Make sure that there is no hydraulic or fuel contamination.

NOTE: This inspection is necessary to prevent contamination of the wiring routes immediately adjacent to the fuel and hydraulic areas.

(2) Do a detailed inspection of the wiring to make sure that there are no signs of ageing, deterioration, overheating, scaling and deformation ESPM 2052120.

NOTE: For information:

On the AC/DC feeder routes 1G and 2G, you can refer to the AWM 940801 and AWM 940802.
On the engine control routes 1S and 2S, you can refer to the AWM 940801 and AWM 940802.
On the other routes 1M and 2M, you can refer to the AWM 940801 and AWM 940802.
On the generator excitation routes 1E and 2E, you can refer to the AWM 940801 and AWM 940802.

NOTE: Use a FLASHLIGHT or a MIRROR - INSPECTION, FLEXIBLE if necessary.

5. Close-up
Subtask 24-92-00-410-080-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) Install these access panels (Ref. AMM TASK 54-52-11-400-001), (Ref. AMM TASK 54-52-11-400-002) and (Ref. AMM TASK 54-53-11-400-002):
(a) FOR [1000EM1] (ENGINE-1)

413AL 413BL 413CL 413DL 413EL 414AR 414AZ 414BR 414CR 414FR.

(b) FOR [1000EM2] (ENGINE-2)

423AL 423AZ 423BL 423CL 423DL 423FL 424AR 424BR 424CR 424ER.

(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 24-92-00-410-080-C ** ON A/C NOT FOR ALL

413AL 413AR 413BL 413BR 413CL 413CR 413DT 414AZ 471AL 471AR.

(b) FOR [1000EM2] (ENGINE-2)

423AL 423AR 423AZ 423BL 423CL 423DT 423BR 423CR 481AL 481AR.

(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:26:01 UTC