**ON A/C 301-399,
(Ref. Fig. 003A)
**ON A/C ALL
R R R R R R R (Ref. Fig. 004) You must only operate the emergency ram-air inlet if: - there is a failure in the two air conditioning packs 10HM and 11HM, - the altitude of the aircraft is less than 10000 ft. (3050 m) (to prevent passenger discomfort), - the difference between the pressure in the fuselage and the external pressure is less than 70mbar (1.0 psi). If the difference in pressure is more, the check valve 4022HM cannot open, no emergency ram air flows in.
A. Opening of the Emergency Ram-Air Inlet To open the emergency ram-air inlet you must lift the guard and push the RAM AIR pushbutton switch 4HZ. When you push it: - a signal is sent to the cabin pressure controllers 11HL (12HL) and the outflow valve 10HL partially opens, - a signal is sent to extend the emergency ram-air-inlet actuator 7HZ and the emergency ram-air inlet flap moves into the external airflow, - the ON legend in the RAM AIR pushbutton switch 4HZ comes on, - actuator position data is sent to the SDACs, - on the lower ECAM display unit, the BLEED page shows the RAM AIR symbol open.
B. Closing of the Emergency Ram-Air Inlet To close the emergency ram-air inlet, you must lift the guard and push the RAM AIR pushbutton switch 4HZ. When you push it: - a signal is sent to the cabin pressure controllers 11HL (12HL) and the outflow valve 10HL closes as necessary, - a signal is sent to the emergency ram-air-inlet actuator 7HZ and the emergency ram-air inlet closes, - the ON legend in the RAM AIR pushbutton switch 4HZ goes off, - actuator position data is sent to the SDACs, - on the lower ECAM display unit, the BLEED page shows the RAM AIR symbol closed.
The emergency ram-air inlet closes automatically if you push the DITCHING pushbutton switch 13HL (Ref. 21-31-00).
C. LP Ground Connections If you connect a ground air cart to the LP ground connection, the air flows into the mixer unit (Ref. 21-21-00). It is not necessary to operate the air conditioning packs to ventilate the aircraft.
EMERGENCY RAM AIR INLET - DEACTIVATION/REACTIVATION
___________________________________________________
TASK 21-55-00-040-001
Operational Test of the Emergency Ram-Air Inlet System
1. Reason for the Job
__________________
Refer to the MMEL TASK: 21-55-02
AIR CONDITIONING
ECAM Emergency RAM Air Inlet Indication
(FAA only) (ECAM Bleed Page)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure 34-10-00-860-002 ADIRS Start Procedure 34-10-00-860-005 ADIRS Stop Procedure
3. Job Set-up
__________
Subtask 21-55-00-861-052
A. Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
Subtask 21-55-00-865-052
B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------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
C. Aircraft Maintenance Configuration
(1)
Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. 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 off).
(4)
Do the start procedure of the ADIRS (Ref. TASK 34-10-00-860-002).
4. Procedure
_________
Subtask 21-55-00-040-050
A. Operational Test
WARNING : MAKE SURE THAT THERE ARE NO PERSONS OR EQUIPMENT NEAR THE
_______ EMERGENCY RAM AIR INLET FLAP. THE MOVEMENT OF THE EMERGENCY RAM AIR INLET FLAP 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.
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
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