Removal of batteries vent duct

TASK 21-26-42-000-803-A
Removal of batteries vent duct

ZONE: 126

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	SCRAPER - NON METALLIC
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
126	LATERAL AVIONIC COMPARTMENT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-13-000-001-A	Removal of the Avionics-Compartment Lateral-Right Door
SRM 517211911001
VENTILATION DUCTS

3. Job Set-up
Subtask 21-26-42-860-061-A

A. Aircraft Maintenance Configuration.
(1) Energize the ground service network . (Ref. AMM TASK 24-42-00-861-001).
(2) In the cockpit, on overhead panel 35VU:
(a) Release these pushbutton switches BAT1 and BAT2 (the OFF legends come on).
(b) Make sure that the WARNING NOTICE(S) in position to tell the persons not to operate the batteries.

Subtask 21-26-42-010-067-A

B. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
in position at the avionic compartment doors 812 and 822..
(2) Open access door 812 (Ref. AMM TASK 52-41-00-010-002).
(3) Open the access panel of AC/DC emergency power centre 106VU and BATTERY power centre 105VU.
(4) Remove the door 822 (Ref. AMM TASK 52-41-13-000-001).

Subtask 21-26-42-865-068-A

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/HOT BUS/702PP SPLY	5PB2	D02
105VU	ELEC/HOT BUS/701PP SPLY	5PB1	D01
105VU	ELEC/HOT BUS/702PP SPLY	12PB2	E02
105VU	ELEC/HOT BUS/701PP SPLY	12PB1	E01
106VU	CSM/G /EV/MAN/SPLY	6XE	B04

4. Procedure
Subtask 21-26-42-020-061-A

A. Removal of the Battery Ventilation Ducts.
(1) Removal of the hoses (2):
(a) Remove the clamps (1) from the batteries.
(b) Remove the clamps (5) and remove the hoses (2).
(c) Put the PLUG-BLANKING in each disconnected line end.
.
(2) Removal of the hose (3):
(a) Remove the two screws (7), the two washers (8) and the two clamps (9).
(b) Remove the clamp (5) on the sleeve (6).
(c) Remove the hose (3).
(d) Put the PLUG-BLANKING in each disconnected line end.
.
(3) Removal of the hose (4):
(a) Remove the screw (7), the washer (8) and the clamp (9).
(b) Remove the clamps (5) and (10) on the sleeves (11) and (6).
(c) Remove the sleeve (6).
(d) Remove the hose (4).
(e) Put the PLUG-BLANKING in each disconnected line end.
.
(4) Removal of the venturi (12):
(a) Remove the clamps (10) and the sleeve (11).
(b) Remove and discard the rivets (13) on the structure SRM 517211911001.
(c) Remove the plate (14).
(d) Use a SCRAPER - NON METALLIC to remove the sealant and clean the area.
(e) Remove the venturi (12).
(f) Put the PLUG-BLANKING in each disconnected line end.
.

Subtask 21-26-42-869-062-A

B. Make sure that there is no electrolyte leakage in the ventilation duct.

NOTE: If there is an electrolyte leakage, remove the duct, clean it and rinse it with water.

[Rev.10 from 2021] 2026.04.02 06:11:03 UTC