737-300 400 500 AMM 飞机维护手册 燃油 FUEL 3(135)

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_______ CRITICAL FOR PROPER OPERATION AND INTRINSIC SAFETY OF THE FQIS. THE SAFE-SIDE HARNESSES ARE TO BE ROUTED WITH A MINIMUM 0.5 INCH (12.7 MILLIMETERS) CLEARANCE FROM OTHER AIRPLANE WIRING IN NON-PRESSURIZED AREAS. A MINIMUM OF A 0.25 INCH (6.35 MILLIMETERS) MUST BE MAINTAINED FROM OTHER AIRPLANE WIRING IN PRESSURIZED AREAS.
 WIRE BUNDLE ROUTING AND INSTALLATION SHALL BE IN ACCORDANCE WITH SWPM 20-10-11 AND 20-10-12.
 ALL WORK SHALL BE IN ACCORDANCE WITH THE SAFETY PRACTICES DESCRIBED IN SWPM 20-00-10.
 (1)  Connect new safe-side harness connector plug to (J2) of the aux tank IFQT connector.
 NOTE: Installation of any new safe-side harness must follow the
____ routing of the old harness that was removed.
 S 424-036
 (2)  Connect the safe-side harness connector plug to the auxiliary tank spar mating connector (bussing plug) (Fig. 403).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ISOLATED FUEL QUANTITY  ú 28-41-45
 TRANSMITTER (IFQT)  ú ú 01 Page 413 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 424-037
 CAUTION: ROUTE THE IFQT (SAFE-SIDE) WIRE HARNESS A WITH A MINIMUM OF 0.5
_______ INCH (12.7 MILLIMETERS) CLEARANCE FROM OTHER AIRPLANE WIRING IN THE NON-PRESSURIZED AREAS. MINIMUM WIRE SEPARATION IS CRITICAL FOR CORRECT OPERATION AND INTRINSIC SAFETY OF THE FQIS.
 (3)  
Route harness through vapor seal at tank (Fig. 403).

 S 424-038

 (4)  
Connect the connector plug to the mating pressure seal assembly connector on the pressure hull.

 S 424-039

 (5)  
Install the harness clamps and tighten to secure the harness.

 NOTE: Make sure harness separation in a minimum of 0.25 inches
____
 (6.35 millimeters) from all other airplane wiring.
 S 914-040
 (6)  
Prepare faying surface of grounding tab on grounding bracket for an electrical bond (SWPM 20-20-00).

 S 424-041

 (7)  
Install ground strap from backshell of new harness to existing grounding bracket near tank wall bussing plug (Fig. 401).

 S 424-042

 (8)  
Tighten the ground tab mounting bolts to 25-35 inch-pounds (2.8-3.9 Newton-meters).

 NOTE: Maximum permissible length of grounding strap from the
____ backshell to the grounding bracket is 6.0 inches (152 millimeters).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITH ISOLATED FUEL QUANTITY  ú 28-41-45
 TRANSMITTER (IFQT)  ú ú 01 Page 414 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 704-043
 (9)  Perform a bonding test from the newly installled safe-side harness as follows:
 (a)  Connect one lead of the bonding test meter to the outer lightning braid near the safe-side harness connector plug.
 NOTE: This will require sliding the probe under the
____ protective expando sleeving to get access to the metallic braid.
 (b)  
Connect the other end of the bonding meter to the grounding bracket.

 (c)  
Make sure that the measured resistance is less than 0.001 ohms.

 S 914-044
 (10) Apply BMS 5-95 sealant on all grounding bracket surface
 (SWPM 20-10-20).

 H.  Right/Left Wing tank to External Pressure Hull IFQT (Safe-Side) Harness Installation
 S 824-047
 CAUTION: THE ROUTING OF THE MULTI-CONDUCTOR SAFE-SIDE WIRE HARNESS IS
_______ CRITICAL FOR PROPER OPERATION AND INTRINSIC SAFETY OF THE FQIS. THE SAFE-SIDE HARNESSES ARE TO BE ROUTED WITH A MINIMUM 0.5 INCH (12.7 MILLIMETERS) CLEARANCE FROM OTHER AIRPLANE WIRING IN NON-PRESSURIZED AREAS. A MINIMUM OF A 0.25 INCH (6.35 MILLIMETERS) MUST BE MAINTAINED FROM OTHER AIRPLANE WIRING IN PRESSURIZED AREAS.
 WIRE BUNDLE ROUTING AND INSTALLATION SHALL BE IN ACCORDANCE WITH SWPM 20-10-11 AND 20-10-12.
 ALL WORK SHALL BE IN ACCORDANCE WITH THE SAFETY PRACTICES DESCRIBED IN SWPM 20-00-10.
 (1) Connect new harness connector plug to applicable tank connector
　
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