Operational Test of the AFT Cargo Compartment Heating System

TASK 21-43-00-710-003-A
Operational Test of the AFT Cargo Compartment Heating System

NOTE: The controlled temperature range for which the system has been designed is between 5 deg.C (41 deg.F) and 26 deg.C (78.8 deg.F). For that reason before proceeding with the operational test and in the case of high outside air temperature, it is recommended to cool the AFT cargo compartment below 26 deg.C (78.8 deg.F).

NOTE: If the APU is not available, connect a ground source supply to the aircraft high pressure connector. The flow rate should not exceed 1.0 Kg/s at a temperature of 200 deg.C.

NOTE: Make sure that you close and lock the AFT cargo-compartment door and the BULK cargo-compartment door (where fitted).

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 12-33-21-618-001-A-02	Pre-conditioning with the APU
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
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 26-16-00-710-003-A	Operational Check of Cargo Compartment Smoke Detection by CFDS to Confirm Isolation Valves Latching Circuit Integrity.
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 21-43-00-861-063-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 21-43-00-865-064-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/FLOW/CTL &/IND1	1HB	D07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT & HTG/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
** ON A/C NOT FOR ALL
122VU	AIR COND/FLOW/MIXER/FLAP	3HB	V22
122VU	AIR COND/FLOW/CTL AND IND/2	2HB	V21
122VU	AIR COND/ZONE TEMP CTL/28VDC/SYS2	4HK	V20
122VU	AIR COND/ZONE TEMP CTL/28VDC/SYS1	3HK	V19
122VU	AIR COND/ZONE TEMP CTL/115VAC/SYS2	2HK	V18
122VU	AIR COND/ZONE TEMP CTL/115VAC/SYS1	1HK	V17
122VU	AIR COND/PACK TEMP/CTL SYS1/2/115VAC	21HH	W22
122VU	AIR COND/PACK TEMP/CTL SYS1/2/28VDC	23HH	W21
122VU	AIR COND/PACK TEMP/CTL SYS1/1/115VAC	1HH	X22
122VU	AIR COND/PACK TEMP/CTL SYS1/1/28VDC	3HH	X21
122VU	AIR COND/PACK TEMP CTL SYS2/2/28VDC	24HH	Y21
122VU	AIR COND/PACK TEMP CTL SYS2/2/115VAC	22HH	Y20
122VU	AIR COND/PACK TEMP CTL SYS2/1/28VDC	4HH	Y19
122VU	AIR COND/PACK TEMP CTL SYS2/1/115VAC	2HH	Y18
** ON A/C NOT FOR ALL
122VU	AIR COND/AFT CARGO VENT/FAN	30HN	S22
** ON A/C NOT FOR ALL
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/28VDC	55HH	W21
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/28VDC	56HH	Y21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/115VAC	54HH	Y20
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18

Subtask 21-43-00-865-093-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/FLOW/CTL &/IND1	1HB	D07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT & HTG/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
** ON A/C NOT FOR ALL
122VU	AIR COND/FLOW/MIXER/FLAP	3HB	V22
122VU	AIR COND/FLOW/CTL AND IND/2	2HB	V21
122VU	AIR COND/ZONE TEMP CTL/28VDC/SYS2	4HK	V20
122VU	AIR COND/ZONE TEMP CTL/28VDC/SYS1	3HK	V19
122VU	AIR COND/ZONE TEMP CTL/115VAC/SYS2	2HK	V18
122VU	AIR COND/ZONE TEMP CTL/115VAC/SYS1	1HK	V17
122VU	AIR COND/PACK TEMP/CTL SYS1/2/115VAC	21HH	W22
122VU	AIR COND/PACK TEMP/CTL SYS1/2/28VDC	23HH	W21
122VU	AIR COND/PACK TEMP/CTL SYS1/1/115VAC	1HH	X22
122VU	AIR COND/PACK TEMP/CTL SYS1/1/28VDC	3HH	X21
122VU	AIR COND/PACK TEMP CTL SYS2/2/28VDC	24HH	Y21
122VU	AIR COND/PACK TEMP CTL SYS2/2/115VAC	22HH	Y20
122VU	AIR COND/PACK TEMP CTL SYS2/1/28VDC	4HH	Y19
122VU	AIR COND/PACK TEMP CTL SYS2/1/115VAC	2HH	Y18
** ON A/C NOT FOR ALL
122VU	AIR COND/AFT CARGO VENT/FAN	30HN	S22
** ON A/C NOT FOR ALL
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/28VDC	55HH	W21
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/28VDC	56HH	Y21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/115VAC	54HH	Y20
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18

Subtask 21-43-00-860-052-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) On the AIR COND panel 30VU:

make sure that the PACK 1 and the PACK 2 pushbutton switches are in the on position (with the FAULT and OFF legend off).
make sure that the X-BLEED selector is in the AUTO position.
make sure that the PACK FLOW selector is in the NORM position.

(2) On the CARGO HEAT panel 22VU:

make sure that the HOT AIR pushbutton switch is in the on position (with the FAULT and OFF legend off).
make sure that the AFT cargo TEMP selector is in the 12 o'clock position.
make sure that the AFT ISOL VALVE pushbutton switch is in the on position (with the FAULT and OFF legend off).

(3) Make sure that the AFT cargo extraction fan operates.
(4) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(5) Do the preconditioning with the APU (Ref. AMM TASK 12-33-21-618-001).

4. Procedure
Subtask 21-43-00-710-056-A ** ON A/C NOT FOR ALL

A. Operational Tests

(1) Do the operational test of the Aft cargo-compartment heating system:

ACTION	RESULT
1.On the panel 30VU: push the APU BLEED pushbutton switch (only if the APU is available).	On the panel 30VU: the blue ON light in the APU BLEED pushbutton switch comes on.
2.On the ECAM control panel 11VU: push the COND pushbutton switch.	On the ECAM lower display unit: the COND page comes on. the two green AFT isolation valve symbols are open. if there is a temperature demand signal, the green trim air valve symbol starts to open until the temperature demand is met.
3.On the panel 22VU: put the AFT cargo TEMP selector in the HOT position.	if there is a temperature demand signal, the green trim air valve symbol opens, the green HOT AIR valve symbol is open.
put the AFT cargo TEMP selector in the COLD position.	the green trim air valve symbol closes.

(2) Do the operational test of the AFT cargo-compartment smoke-detection with the CFDS to confirm isolation valve latching circuit integrity. (Ref. AMM TASK 26-16-00-710-003).

5. Close-up
Subtask 21-43-00-860-053-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Stop the preconditioning with the APU (Ref. AMM TASK 12-33-21-618-001).
(2) On the AIR COND panel 30VU:

make sure that the PACK 1 and the PACK 2 pushbutton switches are in the OFF position.
make sure that the APU BLEED pushbutton switch is in the off position (with the FAULT and ON legend off).

(3) On the CARGO HEAT panel 22VU:

make sure that the AFT ISOL VALVE pushbutton switch is in the OFF position.
make sure that the AFT cargo TEMP selector in the 12 o'clock position.

(4) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).

Subtask 21-43-00-862-059-A ** ON A/C NOT FOR ALL

B. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:05:24 UTC