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Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11B15, CABIN ALTITUDE CONTROL SELECT
(b)
11N15, CABIN ALTITUDE CONTROL AUTO 1
(c)
11N24, CABIN ALTITUDE CONTROL AUTO 2
S 014-003
(2)
Open the forward (No. 1) cargo door, 821, (AMM 06-41-00/201) and find the automatic pressure controller on the E5 rack.
(3)
Remove the automatic pressure controller (AMM 20-10-01/401).
S 024-004
TASK 21-31-02-404-005
3. Install the Automatic Pressure Controller (Fig. 401)_________________________________________
A. References
(1) AMM 06-41-00/201, Fuselage Access Doors and Panels
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BITE INSTRUCTIONS PRESS TEST COMPONENT CONTROLLER AC MOTOR SELECTOR LDG GEAR SW STATUS NO FAULT AC POWER OFF LOW INFLOW VERIFY RESET CABIN PRESSURE VERIFY MODE BIT
A
Automatic Pressure Controller Installation
Figure 401
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(2)
AMM 20-10-01/401, E/E Rack Mounted Components
(3)
AMM 24-22-00/201, Electrical Power Control
B.
Access
(1)
Location Zones
211/212 Control Cabin - Section 41
821 Forward Cargo Door
C.
Procedure
S 424-006
(1)
Install the automatic pressure controller (AMM 20-10-01/401).
S 864-007
(2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers on the P11 panel:
(a)
11B15, CABIN ALTITUDE CONTROL SELECT
(b)
11N15, CABIN ALTITUDE CONTROL AUTO 1
(c)
11N24, CABIN ALTITUDE CONTROL AUTO 2
S 704-008
(3)
Do a test of the automatic pressure controller.
(a)
Supply electrical power (AMM 24-22-00/201).
(b)
Set the MODE SELECT switch on the pilot's overhead panel, P5, to AUTO 1 or AUTO 2.
(c)
Wait approximately two minutes.
(d)
Push the PRESS/TEST button on the installed automatic pressure controller. 1) Make sure all eight lights (seven red and one green) come
on.
NOTE: Lights will stay on while you push the button.
____
(e)
Push the VERIFY switch. 1) Make sure the VERIFY MODE lamp comes on and then goes out.
(f)
Push the VERIFY switch again. 1) Push the RESET button while the VERIFY MODE lamp is on.
(4)
Close the forward (No. 1) cargo door, 821 (AMM 06-41-00/201).
S 414-009
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S 864-010
(5) Remove electrical power, if it is not necessary.
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CABIN PRESSURE OUTFLOW VALVE - MAINTENANCE PRACTICES
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