(3)  
Tighten the jamnuts 50 to 60 pound-inches. S 425-025

 (4)  
Attach lockwire to the element connectors.

 (1)  Disconnect the connectors from the loop.
 (2)  S 755-003Connect the multimeter to the center of the conductor at each end of the loop. This procedure does a test of center conductor continuity. (a) Measure center conductor resistance. Ref. Fig. 501.
 (3)  S 865-005Connect the connectors to the sensor elements.
 (4)  S 875-006Tighten the jamnuts from 50 to 60 pound-inches.
 S 865-007

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737-300/400/500MAINTENANCE MANUAL
 WING AND LOWER AFT BODY OVERHEAT DETECTION SENSING ELEMENT
__________________________________________________________ INSPECTION/CHECK
_________________
 1.  General________
 A. There is one task in this section:
 (1)  Make a check of the wing, lower aft body, and APU compartment overheat detection sensing-element.
 TASK 26-18-11-216-001
 2.  Wing and Lower Aft Body Overheat Detection Inspection_____________________________________________________
 A. Access
 (1)  Location Zones
 210 Air Conditioning Distribution Bay
 212 Left Air Conditioning Equipment Bay
 214 Right Air Conditioning Equipment Bay
 215 Keel Beam
 218 Aft Cargo Compartment
 220 Aft Cargo Compartment Equipment Bay
 303 Left Wing Inboard Leading Edge
 403 Right Wing Inboard Leading Edge
 507 Area 7 Strut
 607 Area 7 Strut
 703 APU Compartment

 B. Procedure
 S 226-007
 (1)  Examine the sensing element.
 (a)  
Examine the detector elements for all bends less than the minimum bend radius of 1 inch.

 (b)  
Examine the elements for no bends nearer than 1 inch of the clamps and flange assemblies.

 (c)  
Examine the detector elements for worn areas and cuts.

 NOTE:____Permit lightly worn areas on the finish. Reject detectors with badly worn areas or cuts.
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737-300/400/500MAINTENANCE MANUAL
 (d)  Make sure that there is no unwanted material on the seal face of the end connectors.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 EXTINGUISHING - DESCRIPTION AND OPERATION
_________________________________________
 1.  General_______
 A.  Fire extinguishing consists of engine fire extinguishing, APU fire extinguishing, portable fire extinguishing, and lavatory fire extinguishing.
 B.  Engine Fire Extinguishing (26-21-00)
 (1)  Two fire extinguishing bottles distribute extinguishing agent to either engine. Both bottles are in the main wheel well.
 C.  APU Fire Extinguishing (26-22-00)
 (1)  One fire extinguishing bottle distributes extinguishing agent to the APU. The bottle is on the lower right side of the empennage section.
 D.  Portable Fire Extinguishing (26-23-00)
 (1)  Portable fire extinguishers are located throughout the flight and passenger compartment areas.
 E.  Lavatory Fire Extinguishing (26-24-00)
 (1)  The lavatory fire extinguishing system consists of a heat-activated fire extinguisher bottle in each lavatory to extinguish fires under the sink counter and in the towel chute.
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