Operational Check of the Emergency Ram-Air Inlet System

TASK 21-55-00-710-001-A
Operational Check of the Emergency Ram-Air Inlet System

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 215500-01
OPERATIONAL CHECK OF EMERGENCY RAM AIR INLET SYSTEM

2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. Referenced Information

REFERENCE	DESIGNATION
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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 34-10-00-860-002-A	ADIRS Start Procedure
TASK 34-10-00-860-005-A	ADIRS Stop Procedure

3. Job Set-up
Subtask 21-55-00-861-050-A

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

Subtask 21-55-00-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/RAM/AIR/INLET	1HZ	D10
49VU	AIR COND/CAB/PRESS/CTL1	1HL	D09
122VU	AIR COND/CAB PRESS/CTL/2	2HL	Y22

Subtask 21-55-00-869-050-A

C. Aircraft Maintenance Configuration
(1) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(2) Make sure that the BLEED page shows on the ECAM lower display unit.
(3) Make sure that the PACK 1 and the PACK 2 pushbutton switches on the AIR COND panel 30VU are in the OFF position.
(4) Do the start procedure of the ADIRS (Ref. AMM TASK 34-10-00-860-002).

4. Procedure
Subtask 21-55-00-710-050-A

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE OUTFLOW VALVES ARE CLEAR. MOVEMENT OF THE OUTFLOW VALVES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: MAKE SURE THAT THERE ARE NO PERSONS OR EQUIPMENT NEAR THE RAM AIR INLET FLAPS. THE MOVEMENT OF THE RAM AIR INLET FLAPS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

A. Operational Test

NOTE: Make sure that the area around the emergency ram air-flap is free from ground equipment and personnel.

(1) Do this test

ACTION	RESULT
1.On the AIR COND panel 30VU: lift the black guard and push the RAM AIR pushbutton switch.	On the AIR COND panel 30VU: the white ON pushbutton switch light comes on.
	On the ECAM lower display unit: the ram air inlet symbol opens (the maximum operation time 20 s).
	On the ECAM upper display unit: the green RAM AIR ON memo message comes on.
2.On the ECAM control panel 11VU: push the PRESS pushbutton switch.	On the ECAM lower display unit: the CAB PRESS page comes on. the outflow valve symbol shows approx. 50 DEG. open when the differential pressure in the fuselage is less than 1 psi.
3.On the AIR COND panel 30VU: lift the black guard and push the RAM AIR pushbutton switch.	On the AIR COND panel 30VU: the white ON pushbutton switch light goes off.
	On the ECAM lower display unit: the outflow valve symbol shows fully open.
	On the ECAM upper display unit: the green RAM AIR ON memo message goes off.
4.On the ECAM control panel 11VU: push the BLEED pushbutton switch.	On the ECAM lower display unit: the BLEED page comes on. the ram air inlet symbol is closed.

5. Close-up
Subtask 21-55-00-860-050-A

A. Put the Aircraft back in its initial Configuration
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:07:35 UTC