Clean "Chilled Air In" and "Chilled Air Out" Grilles/Filters in Galley Cabinet

TASK 25-34-00-100-001-A
Clean "Chilled Air In" and "Chilled Air Out" Grilles/Filters in Galley Cabinet

1. Reason for the Job
Refer to the MPD TASK: 253400-01.
CLEAN "CHILLED AIR IN" AND "CHILLED AIR OUT" GRILLES/ FILTERS IN GALLEY CABINET
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	VACUUM CLEANER
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
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
TASK 25-34-51-000-001-A	Removal of the Air Chiller Unit - Forward Galley
TASK 25-34-51-000-002-A	Removal of the Air Chiller Unit - Aft Galley
TASK 25-34-51-400-001-A	Installation of the Air Chiller Unit - Forward Galley
TASK 25-34-51-400-002-A	Installation of the Air Chiller Unit - Aft Galley
Air Chiller Filter

3. Job Set-up
Subtask 25-34-00-861-051-A ** ON A/C NOT FOR ALL

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

Subtask 25-34-00-941-051-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the overhead panel, on AIR COND panel 30VU:
(a) Make sure that these pushbutton switches are released:

APU BLEED pushbutton switch (the ON legend is off)
All the ENG BLEED pushbutton switches (the OFF legends are on)
PACK 1 and PACK 2 pushbutton switches (the OFF legends are on).

(b) Put the WARNING NOTICE(S) in position to tell persons not to operate these pushbutton switches.
(2) On the High Pressure (HP) and Low Pressure (LP) ground-air connectors:
(a) Put the WARNING NOTICE(S) in position to tell persons not to connect the ground air supply.

Subtask 25-34-00-010-051-B ** ON A/C NOT FOR ALL

C. Get Access
(1) If you must clean the air chiller filter of the Galley 1, remove the air chiller of the Galley 1 (Ref. AMM TASK 25-34-51-000-001).

NOTE: It is not necessary to fully remove the air chiller unit to clean the filter.

(2) If you must clean the air chiller filter of the Galley 5, remove the air chiller of the Galley 5 (Ref. AMM TASK 25-34-51-000-002).

NOTE: It is not necessary to fully remove the air chiller unit to clean the filter.

4. Procedure
Subtask 25-34-00-160-050-A ** ON A/C NOT FOR ALL

A. Cleaning of the Air Chiller Filter

Air Chiller Filter ** ON A/C NOT FOR ALL

CAUTION: DO NOT USE THE CLEANING AGENTS TO DO THIS PROCEDURE. THE CLEANING AGENTS WILL CAUSE DAMAGE TO AND POSSIBLE BLOCKAGE OF THE FILTER PADS.

(1) Use a VACUUM CLEANER to clean the air filter (1) of the air chiller unit.
(2) Examine the air filter (1) for damage. If necessary, replace the air filter (1) (Ref. AMM D/O 25-34-00-96).

5. Close-up
Subtask 25-34-00-410-051-B ** ON A/C NOT FOR ALL

A. Close Access
(1) If you cleaned the air chiller filter of the Galley 1, install the air chiller of the Galley 1 (Ref. AMM TASK 25-34-51-400-001).
(2) If you cleaned the air chiller filter of the Galley 5, install the air chiller of the Galley 5 (Ref. AMM TASK 25-34-51-400-002).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 25-34-00-942-051-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Remove the WARNING NOTICE(S) from:

The HP and LP ground-air connectors
AIR COND panel 30VU.

Subtask 25-34-00-862-051-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.03.31 23:33:56 UTC