Operational Test of the FWD Cargo Compartment Heating System

TASK 21-43-00-710-002-A
Operational Test of the FWD 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 FWD 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 FWD cargo-compartment door.

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 21-43-00-861-062-A ** ON A/C NOT FOR ALL

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

Subtask 21-43-00-865-063-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/FWD CARGO/VENT/CTL & MONG	2HN	C08
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
122VU	FWD CARGO VENT AND HTG/FAN	1HN	T22
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 21-43-00-860-050-B ** ON A/C NOT FOR ALL

C. 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 ECON FLOW pushbutton switch is in the off position (with the ON legend off).
make sure that the HOT AIR pushbutton switch is in the on position (with the FAULT and OFF legend off).

(2) On the CARGO HEAT panel 22VU:

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

(3) Make sure that the FWD 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 21-43-00-710-055-A ** ON A/C NOT FOR ALL

A. Operational Tests
(1) Do the operational test of the Fwd 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 FWD isolation valve symbols are open. the green HOT AIR valve symbol is open. if there is a temperature demand signal, the green trim air valve symbol starts to open until the temperature demand is met, then the trim air valve symbol starts to close.
3.On the panel 22VU: put the FWD cargo TEMP selector in the HOT position.	the green trim air valve symbol opens.
put the FWD cargo TEMP selector in the COLD position.	the green trim air valve symbol closes.

(2) Do the operational test of the FWD 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 21-43-00-860-051-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 FWD ISOL VALVE pushbutton switch is in the OFF position.
make sure that the FWD cargo TEMP selector in the 12 o'clock position.

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

Subtask 21-43-00-862-058-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] 2026.04.01 05:01:58 UTC