R 3. Job Set-up__________
R Subtask 21-26-00-861-081
R A. Aircraft Maintenance Configuration
R (1) Energize the aircraft electrical circuits
R (Ref. TASK 24-41-00-861-002).
R (2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
R (Ref. TASK 31-60-00-860-001)
R Subtask 21-26-00-865-095
R B. Open, safety and tag this(these) circuit breaker(s):
R -------------------------------------------------------------------------------
R PANEL DESIGNATION IDENT. LOCATION
R -------------------------------------------------------------------------------
R 49VU AIR COND/AVNCS VENT/CTL 5HQ D05
R Subtask 21-26-00-010-086
R C. Get Access
R (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the
R access door 824.
R (2) Open the access door 824.
R 4. Procedure_________
R (Ref. Fig. 406/TASK 21-26-00-991-011)
R Subtask 21-26-00-040-062
R A. Opening Procedure of the Conditioned-Air Inlet Valve
R (1) On the VENTILATION section of the overhead panel 22VU:
R - release the BLOWER pushbutton switch (the OVRD legend comes on).
R (2) On the conditioned-air inlet valve 21HQ:
R (a) Disconnect the connector 21HQ-A from the valve 21HQ.
R (b) Put CAP - BLANKING on the disconnected electrical connectors.
R (c) Keep the electrical cable and its connector near the valve.
R (d) Fully open the valve 21HQ with the manual mechanism.
R (3) On the bottom part of the upper ECAM display unit:
R - the VENT AVNCS SYS FAULT warning comes into view.
R Ignore this warning.
R On the ECAM control panel:
R - push the CLR key.
R (4) Remove the safety clip(s) and the tag(s) and close this(these)
R circuit breaker(s):
R 5HQ.
R (5) Do an operational test of the avionics equipment ventilation from the
R MCDU (Ref. TASK 21-26-00-710-001).
R 5. Close-up________
R Subtask 21-26-00-410-083
R A. Close Access
R (1) Make sure that the work area is clean and clear of tool(s) and other
R items.
R (2) Close the access door 824 (Ref. TASK 52-41-00-410-002).
R (3) Remove the access platform(s).
R Subtask 21-26-00-942-082
R B. Safety Precautions
R (1) Put WARNING NOTICE in position in the cockpit to tell the crew that
R the blower fan and the conditioned-air inlet valve are deactivated.
R (2) Make an entry in the log book.
R Subtask 21-26-00-862-083
R C. Aircraft Maintenance Configuration
R (1) Do the EIS stop procedure
R (Ref. TASK 31-60-00-860-002).
R (2) De-energize the aircraft electrical circuits
R (Ref. TASK 24-41-00-862-002).
TASK 21-26-00-440-006 Reactivation of the Blower Fan
1. Reason for the Job
__________________
Refer to the MMEL TASK: 21-26-01 b)
Avionics Equipment Ventilation
Blower Fan
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