Cleaning of the Transformer Rectifier (TR)

TASK 24-32-00-100-801-A
Cleaning of the Transformer Rectifier (TR)

ZONE: 126
FIN: 1PU1
FIN: 1PU2

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	1	AIR SOURCE FILTERED, DRY
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	VACUUM CLEANER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
126	LATERAL AVIONIC COMPARTMENT
822

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-32-00-710-001-A	Operational Test of the DC Generation Switching
TASK 24-32-51-000-001-A	Removal of the Transformer Rectifier
TASK 24-32-51-400-001-A	Installation of the Transformer Rectifier
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
Transformer Rectifier

3. Job Set-up
Subtask 24-32-00-861-054-A

A. Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).

Subtask 24-32-00-010-056-A

B. Get access to the avionics compartment.
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at access door 822.
(2) Open access door 822.

Subtask 24-32-00-865-058-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 1PU1 (TR1)
123VU	TR1/SPLY	2PU1	AB10
FOR FIN: 1PU2 (TR2)
123VU	TR2/SVCE/BUS 2/SPLY	1XX	AB08
123VU	TR2/214XP/SPLY	2PU2	AB04

4. Procedure
Subtask 24-32-00-210-050-A

A. Cleaning of the TR

WARNING: WHEN YOU USE COMPRESSED AIR:

USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.

LOOSE PARTICLES AND/OR HIGH PRESSURE AIR CAN CAUSE INJURY.

CAUTION: IF THERE IS DRY SAND/DUST, DO NOT USE FLUIDS TO REMOVE THE SAND/DUST. IF THERE IS LAYER OF SAND/DUST ON THE AIRCRAFT SURFACES, REMOVE THE SAND/DUST WITH A VACUUM CLEANER (OR, IF YOU CANNOT USE A VACUUM CLEANER, USE AN AIR BLOWER, A SOFT CLOTH OR A HAND BRUSH). FLUIDS CAN MIX WITH THE SAND/DUST AND MAKE A PASTE THAT CAN CAUSE EROSION/ABRASION. THIS PASTE CAN GO INTO AREAS THAT ARE NOT EASY TO CLEAN.

CAUTION: MAKE SURE THAT THE VACUUM CLEANER IS CLEAN. IF YOU USE A VACUUM CLEANER THAT IS NOT CLEAN, THERE IS A RISK OF DUST CONTAMINATION IN THE AVIONICS COMPARTMENT.

(1) Remove the TR (1) (Ref. AMM TASK 24-32-51-000-001).
(2) Use the VACUUM CLEANER to remove the dust from the TR (1) and the adjacent area.
(3) Adjust the air pressure to less than 5 bar (72.5 psi).
(4) Use the low pressure AIR SOURCE FILTERED, DRY to remove the dust collected in the TR (1).
(5) If necessary, use a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) to clean the external surfaces of the TR (1).
(6) Use the VACUUM CLEANER to clean the hot-air exhaust duct (2) and the ventilation grid of the TR (1).
(7) Install the TR (1) (Ref. AMM TASK 24-32-51-400-001).

Subtask 24-32-00-865-059-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 1PU1 (TR1)
123VU	TR1/SPLY	2PU1	AB10
FOR FIN: 1PU2 (TR2)
123VU	TR2/SVCE/BUS 2/SPLY	1XX	AB08
123VU	TR2/214XP/SPLY	2PU2	AB04

Subtask 24-32-00-710-056-A

C. Do the operational test of the DC main-generation switching (Ref. AMM TASK 24-32-00-710-001).

NOTE: Before you start the operational test, you must reset the TR from the Centralized Fault Display System (CFDS).

5. Close-up
Subtask 24-32-00-410-055-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 822.
(3) Remove the access platform(s).

Subtask 24-32-00-862-054-A

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 05:49:26 UTC