General Visual Inspection of Exposed EWIS Within the Vent Surge Tank (EWIS)

TASK 24-92-00-210-802-A
General Visual Inspection of Exposed EWIS Within the Vent Surge Tank (EWIS)

ZONE: 550
ZONE: 650

1. Reason for the Job
Refer to the MPD TASK: 200550-01
GENERAL VISUAL INSPECTION OF EXPOSED EWIS WITHIN THE VENT SURGE TANK (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 5M (16 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
98D27803500001	1	LOCKING TOOL ZERO POS

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
550	VENT SURGE TANK
650	VENT SURGE TANK
550AB, 550BB, 550CB, 550DB, 650AB, 650BB, 650CB, 650DB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
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 28-10-00-910-001-A	Safety Procedures When You Do Work in a Fuel Tank
TASK 28-10-00-910-002-A	Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-25-00-650-003-A	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01	To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-869-001-A	Fuel Transfer
TASK 57-27-11-000-002-A	Removal of the Access Panel
TASK 57-27-11-400-002-A	Installation of the Access Panel
ESPM 2052110
Vent Surge Tank - Access Panels - Zones 550-650 ** ON A/C NOT FOR ALL
Vent Surge Tank - Inspection Area - Zones 550-650 ** ON A/C NOT FOR ALL
Vent Surge Tank - Access Panels - Zones 550-650 ** ON A/C NOT FOR ALL
Vent Surge Tank - Inspection Area - Zones 550-650 ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 24-92-00-941-061-A

A. Safety Precautions

WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

NOTE: You must obey the fuel safety procedures when you do work in a fuel tank (Ref. AMM TASK 28-10-00-910-001) and (Ref. AMM TASK 28-10-00-910-002).

(2) Install the 98D27803500001 LOCKING TOOL ZERO POS on the flap/slat control lever.
(3) Put WARNING NOTICE(S) in the cockpit to tell persons not to operate the flaps or slats.

Subtask 24-92-00-650-056-A

B. Fuel Configuration
(1) Drain the remaining fuel from the applicable surge tank (Ref. AMM TASK 28-25-00-650-003).

Subtask 24-92-00-010-138-A

C. Get Access
(1) Put an ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position at the zones 550 and 650.
(2) Remove the access panels between RIB22 to RIB26 (Ref. AMM TASK 57-27-11-000-002):
(a) For the left wing:

550AB 550BB 550CB 550DB.

(b) For the right wing:

650AB 650BB 650CB 650DB.

Subtask 24-92-00-862-126-A

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

4. Procedure
Subtask 24-92-00-210-102-A

A. General Visual Inspection of All Exposed Wiring Within the Vent Surge Tank
(1) Do a visual inspection of the wiring to make sure that there is no signs of ageing, alteration, overheating, scaling and deformation ESPM 2052110:
(a) On sensitive routes: 1S and 2S, surge tank overflow-sensor and electrical harness.

5. Close-up
Subtask 24-92-00-410-136-A

A. Close Access
(1) Install the access panels between RIB22 to RIB26 (Ref. AMM TASK 57-27-11-400-002):
(a) For the left wing:

550AB 550BB 550CB 550DB.

(b) For the right wing:

650AB 650BB 650CB 650DB.

Subtask 24-92-00-650-057-A

B. Fuel Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 12-11-28-650-003), (Ref. AMM TASK 28-25-00-650-001), (Ref. AMM TASK 28-25-00-869-001).

Subtask 24-92-00-942-059-A

C. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the 98D27803500001 LOCKING TOOL ZERO POS from the flap/slat control lever.
(3) Remove the safety barriers.
(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:26:37 UTC