C34846
Fuel Flow Transmitter Installation 500
73-31-11Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/93
B. Remove clamp plate and adapter from transmitter and save for installation.
C. Remove bonding jumper between electrical connectors and save for installation.
D. Prior to installing forward adapter, check that forward adapter and clamp plate are compatible per Table 1.
TABLE 1
ADAPTER CLAMP PLATE TORQUE VALUE PWA SB4936
PWA P/N PWA P/N POUND-INCHES STATUS
773086 773085 570 - 630 ACCOMPLISHED
447884 719851 570 - 630 NOT ACCOMPLISHED
E. Using new O-ring lightly lubricated with fuel, install forward adapter, clamp plate and retainer onto outlet end of transmitter.
NOTE: Arrow scribed on transmitter indicates direction of fuel flow.
(1) Prior to attaching forward adapter, lubricate male threads with Molykote Type G-N. Attach forward adapter to transmitter and while gripping the transmitter wrenching flats, tighten adapter torque values in Table 1.
CAUTION: DO NOT ALLOW TORQUE TO BE TRANSMITTED THROUGH TRANSMITTER BODY WHILE ATTACHING FORWARD ADAPTER
F. Using new O-ring lightly lubricated with fuel, install fuel inlet adapter, retainer and locknut onto inlet end of transmitter.
G. Place new ferrule, packing and retainer on fuel inlet line.
H. Place new O-ring, lightly lubricated with fuel, into groove of adapter in outlet end of transmitter.
5. Install Fuel Flow Transmitter
A. Position transmitter against engine and insert fuel inlet line into fuel inlet connection.
B. Insert adapter, on outlet end of transmitter, into fuel outlet adapter.
NOTE: It may be necessary to spring the fuel inlet line slightly, towards the rear of the engine, to perform steps A. and B.
C. Slide transmitter support bracket into position on fuel inlet connection and install three mounting bolts.
D. Install clamp plate-mounting bolts.
E. Connect fuel inlet line to fuel inlet connection.
F. Install bonding jumpers to transmitter.
G. Connect electrical connector to transmitter.
530
Jun 20/92 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 73-31-11 Page 403
6. Restore Airplane to Normal Configuration
A. Push in applicable fire switch to open engine fuel shutoff valve.
B. Push in both FUEL FLOW circuit breakers and applicable ENG SHUTOFF VALVE circuit breaker on circuit breaker panel P6-3.
C. Perform engine leak check run (Ref Chapter 71).
NOTE: When starting engine for engine leak check run after replacing fuel flow transmitter; the fuel flow indicator may not indicate any flow until all air has been purged from transmitter.
500
73-31-11 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 15/78
FUEL FLOW TRANSMITTER - REMOVAL/INSTALLATION
EFFECTIVITY
AP N471GB and N472GB
BU LN-SUA, LN-SUJ, LN-SUQ LN-SUU, LN-SUV, LN-SUZ
GJ B-2509 and B-2510
1. General
A. Removal/Installation procedures for any one of the fuel flow transmitters are basically the same, the only difference being one of location. There is one transmitter mounted on the forward left side of each engine.
2. Prepare to Remove Fuel Flow Transmitter
A. Pull applicable fire switch to close engine fuel shutoff valve. Pull applicable ENG SHUTOFF VALVE circuit breaker on circuit breaker panel P6.
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