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(4)
On the skin-exchanger outlet bypass-valve (23HQ) :
(a)
Disconnect the connector 23HQ-A from the valve 23HQ.
(b)
Put blanking caps on the disconnected electrical connectors.
(c)
Keep the electrical cable with its connector near the valve and attach them with an adhesive tape.
(d)
Fully close the valve (23HQ) with the manual mechanism (F position).
(5)
On the skin-exchanger inlet bypass-valve (16HQ) :
(a)
Disconnect the connector 16HQ-A from the valve 16HQ.
(b)
Put blanking caps on the disconnected electrical connectors.
(c)
Keep the electrical cable with its connector near the valve and attach them with an adhesive tape.
(d)
Fully close the valve (16HQ) with the manual mechanism (F position).
NOTE : Because the horn is not serviceable in flight, BLOWER and
____ EXTRACT pushbutton switches must be in AUTO configuration (pushed, with the FAULT and the OVRD legends off). Ignore the warnings not related to the system.
Subtask 21-26-00-440-057
B. Reactivation of the Valves When the aircraft is in the ground configuration, do these operations :
(1) On the skin-exchanger isolation valve (24HQ) and skin-exchanger inlet and outlet bypass-valves (16HQ and 23HQ) :
(a) Connect the connectors 16HQ-A, 23 HQ-A and 24HQ-A to the valves 16HQ, 23HQ and 24HQ.
WARNING : DO NOT USE YOUR FINGERS TO SET THE SWITCHES TO THE "ON"
_______ POSITION. USE A STICK, AND BE VERY CAREFUL. THE AVIONICS EQUIPMENT VENTILATION COMPUTER (AEVC) WILL POSSIBLY PUT THE VALVES 22HQ AND 15HQ DIRECTLY IN THE CLOSED POSITION AND THEY WILL CUT YOUR FINGERS.
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(2) On the skin air-inlet and air-outlet valves (15HQ, 22HQ) :
(a)
Push the PUSH latch to release the handle.
(b)
Pull the handle.
(c)
Fold out the handle.
(d)
Set the deactivation switch to ON.
(e)
Close and latch the handle.
NOTE : The closing of the avionics ventilation system has these
____
time limits :
-
when the OAT is less than or equal to 49 deg.C (120.20 deg.F) : no limit,
-
when the OAT is between 49 deg.C (120.20 deg.F) and 55 deg.C (131 deg.F) : 2 hours,
-
when the OAT is between 55 deg.C (131 deg.F) and 60 deg.C (140 deg.F) : 1 hour,
-
when the OAT is equal to or more than 60 deg.C (140 deg.F) : 30 minutes. On the AIR COND panel 30VU, make sure that the FAULT and OFF legends of the PACK 1(2) pushbutton switch are off. On the VENTILATION section of the overhead panel 22VU, make sure that the EXTRACT pushbutton switch is in the OVRD configuration (released, with the OVRD legend on).
R **ON A/C 059-099, 102-149, 151-199, 201-299, 301-399, 401-499,
Subtask 21-26-00-040-057-A
A. Deactivation of the Valves
WARNING : DO NOT USE YOUR FINGERS TO SET THE SWITCHES TO THE "ON"
_______ POSITION. USE A STICK, AND BE VERY CAREFUL. THE AVIONICS EQUIPMENT VENTILATION COMPUTER (AEVC) WILL POSSIBLY PUT THE VALVES 22HQ AND 15HQ DIRECTLY IN THE CLOSED POSITION AND THEY WILL CUT YOUR FINGERS.
CAUTION : DO NOT USE FORCE TO TURN THE HANDLE. THERE ARE SHEAR PINS IN
_______ THE HANDLE. IF YOU APPLY FORCE TO THE HANDLE WHEN THE FLAP IS IN THE FULLY OPEN OR CLOSED POSITION, THE SHEAR PINS WILL BREAK.
NOTE : It is possible that the measurement of the skin temperature is
____ different from the Outside Air Temperature (OAT). Thus, it is possible that the skin air outlet-valves are in the open position and the OAT is lower than 12 deg.C (53.60 deg.F) (at the same time). In this condition, the valves can stay in the open position.
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