(2)
If inked stamp data is missing or adjustment values are not the same, indicator must be either bench adjusted to the removed indicator settings or the indicator must be adjusted after installation on the airplane.
B. Remove the tag and reconnect the electrical connector to the correct installation location as identified by the tag, of the indicator being removed.
C. Install indicator in panel and tighten clamp screw. Leave clamp screw loose if indicator must be adjusted.
D. Perform fuel quantity indicator adjustment on non-precalibrated indicators (Ref 28-41-0).
3. Check Fuel Quantity Connectors
A. The following steps must be performed to assure the fuel quantity connectors are connected to the correct indicator.
(1)
Disconnect the connector D884 or D901 at the bussing plug for the No. 1 main tank on the front spar.
(2)
Make sure the indicator for the No. 1 tank shows zero fuel quantity.
(3)
Reconnect connector D884 or D902.
(4)
Disconnect the connector D888 or D906 at the bussing plug for the No. 2 main tank on the front spar.
(5)
Make sure the indicator for the No. 2 tank shows zero fuel quantity.
(6)
Reconnect connector D888 or D906.
(7)
A check of the center tank indicator is not necessary, as the indicator cannot be cross-connected with tank No. 1 or tank No. 2 indicators.
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FUELING QUANTITY INDICATOR - REMOVAL/INSTALLATION
1. Remove the Fueling Quantity Indicator
A. Procedure
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) On the circuit breaker panel, P6:
1) QTY
2) EP GND FUELING
(2)
Open the access door for the refueling control panel (P15).
(3)
Loosen the clamp screw of the applicable fueling quantity indicator.
(4)
Remove the indicator from the panel.
(5)
Disconnect the electrical connector at the indicator and attach a tag to identify the correct electrical connector installation location to the indicator being in removed.
WARNING: MAKE SURE EACH ELECTRICAL CONNECTOR HAS A TAG TO IDENTIFY THE CORRECT ELECTRICAL CONNECTOR INSTALLATION LOCATION TO THE INDICATOR BEING REMOVED. CROSS CONNECTION OF THE ELECTRICAL CONNECTORS CAN CAUSE THE AIRPLANE SYSTEM TO MALFUNCTION AND THE LOSS OF SAFE FLIGHT.
2. Install the Fueling Quantity Indicator
A. Inspection (Per SB 28-1193)
(1)
Open the access door for the fueling control panel (P15) if it is not open.
(a) Remove the pins that attach the linkage assemblies to the access door.
(2)
Remove the screws that attach the fueling control panel to the wing structure.
(3)
Disconnect the bonding jumpers from the fueling control panel.
(4)
Remove the fueling control panel.
NOTE: You can also attach the panel to the support member for the leading edge to keep it safe during this procedure.
(5)
Visually examine the wires in the wire bundle to the connector plug on the back of the fueling control panel.
(a) Look for indications of these types of problems: 1) Chafed wires 2) Damaged wires 3) Arcing 4) Loose wires with too much wire slack 5) Damage to the contact pins on the panel connector plug or to the sockets on the
mating connector.
(6) Behind the fueling control panel and inside the wing structure, do a check for any marks or indications where wire chafing occurred.
(a) Examine these types of surfaces: 1) Flat edges on the back of the fueling control panel. 2) Round edges on the backshells of the fueling quantity indicators. 3) Any sharp edges or objects inside the wing structure behind the fueling control
panel.
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(7) If you find wires with problems or damage, then repair or replace those wires:
(a)
If there is any damage to the contact pins in the connector plug or to the sockets in the mating connector, replace those pins and sockets (SWPM 20-10-13).
(b)
Move loose and untied wires away from sharp edges and objects behind the fueling control panel and inside the wing structure (SWPM 28-10-11). 1) Tie these wires to the main wire bundle. 2) Make sure the wire bundle service loops have sufficient length and slack to
permit the fueling control panel to be pulled out and lowered from the wing structure for servicing of the fueling quantity indicators without complete removal of the panel. 中國航空網 www.k6050.com 航空翻譯 www.aviation.cn 本文鏈接地址：737 AMM 飛機維護手冊 燃油 FUEL(177)
