Operational Test of the Emergency Ram-Air Inlet System

TASK 21-55-00-040-001-A
Operational Test of the Emergency Ram-Air Inlet System

Task Summary

Access	Test	Specific Tools	Mhr	E/T	Nb Men
NO	NO	NO	0.4	0.4	1

1. Reason for the Job
MMEL 21-07-01-06A
EMERGENCY RAM AIR INLET INDICATION ON THE BLEED SD PAGE (FAA ONLY)
2. Job Set-up Information
A. 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 21-55-00-861-052-A

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

Subtask 21-55-00-865-052-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 21-55-00-860-051-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 PRESS page shows on the ECAM lower display unit.
(3) On the AIR COND panel 30VU:

make sure that the PACK 1 and the PACK 2 pushbutton switches are in the off position (the OFF legends are on).

(4) Do the start procedure of the ADIRS (Ref. AMM TASK 34-10-00-860-002).

4. Procedure
Subtask 21-55-00-040-050-A

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.

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.

A. Operational Test

ACTION	RESULT
1.On the AIR COND panel 30VU: lift the black guard and push the RAM AIR pushbutton-switch to the on position.	On the AIR COND panel 30VU: in the RAM AIR pushbutton-switch the ON legend comes on.
	On the ECAM upper display unit: the green RAM AIR ON message comes on.
	On the ECAM lower display unit: the outflow valve symbol shows approx. 50 DEG. open when the differential pressure in the fuselage is less than 1 psi.
2.On the AIR COND panel 30VU: lift the black guard and push the RAM AIR pushbutton-switch to the off position.	On the AIR COND panel 30VU: on the RAM AIR pushbutton-switch the ON legend goes off.
	On the ECAM lower display unit: the outflow valve symbol moves to the fully open position.
	On the ECAM upper display unit: the green RAM AIR ON message goes off.

5. Close-up
Subtask 21-55-00-860-052-A

A. Put the aircraft back to 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).

Subtask 21-55-00-941-050-A

B. Remove the WARNING NOTICE(S).

Subtask 21-55-00-862-052-A

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

[Rev.10 from 2021] 2026.04.02 06:48:45 UTC