S 014-004
(3)
Open the door on the FQPU.
S 214-014
(4)
Make sure the LED indicator light on the IFQC card is not on.
S 914-013
CAUTION: DO NOT TOUCH THE IFQC CARD BEFORE YOU DO THE PROCEDURE FOR
_______ DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE IFQC CARD.
(5)
Do the procedure for the devices that are sensitive to an electrostatic discharge (AMM 20-41-02/201).
(6)
Remove the applicable IFQC card from the FQPU (AMM 20-11-22/401).
S 024-015
TASK 28-41-15-404-007
3. IFQC Card Installation (Fig. 401)______________________
A. References
(1)
AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Components
(2)
AMM 20-41-02/201, Electrostatic Discharge Sensitive Devices
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747-400
MAINTENANCE MANUAL
(3)
AMM 28-41-00/501, Fuel Quantity Indicating System
(4)
SSM 28-41-02, 28-41-03, 28-41-04, 28-41-05
(5)
WDM 28-41-12, 28-41-21, 28-41-22, 28-41-23, 28-41-24
(6)
AIPC 28-41-02, Fig. 10
B.
Access
(1)
Location Zone 125 Area Below Forward Cargo Container Compartment, Left
(2)
Access Panel
125B Electronics Access Door
C.
Procedure
S 914-018
CAUTION: DO NOT TOUCH THE IFQC CARD BEFORE YOU DO THE PROCEDURE FOR THE
_______ DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE IFQC CARD.
(1)
Do the procedure for the devices that are sensitive to an
electrostatic discharge (AMM 20-41-02/201).
S 424-017
(2)
Install the IFQC card in the applicable slot in the FQPU M7860 (AMM 20-41-02/201).
S 414-009
(3)
Close the door on the FQPU.
S 864-010
(4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
On the main power distribution panel, P6:
1) 6D5, FUEL QTY 1
2) 6D6, FUEL QTY 2
(b)
On the DC power distribution panel, P180:
1) 180M8, FUELING VALVE 2
2) 180M9, FUELING PWR - HOT BAT
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(c) 3) 180C25, FUELING LTS PANEL 4) 180C26, FUELING LTS RECPOn the left power distribution center, P414: 1) 414F17, FUELING VALVE 2) 414F22, FUELING PWR
(5) S 214-016Make sure the LED indicator light on the IFQC card is on and green.
(6) S 414-012Close the electronics access door, 125B.
(7) S 744-022Do this CMC ground test, <FUEL QUANTITY IND (AMM 28-41-00/501).
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747-400 MAINTENANCE MANUAL
FUEL QUANTITY PROCESSOR INPUT/OUTPUT CARDS - REMOVAL/INSTALLATION
_________________________________________________________________
1. General_______
A. This procedure contains instructions to remove and install the input/output channel (IOC) cards in the fuel quantity processor unit (FQPU), M7860. The two IOC cards are interchangeable.
B. The FQPU is found below the forward cargo container compartment in the center equipment bay, installed on the E6 equipment rack. Access is through the electronics access door, 125B.
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