26-18-11
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
B. Access
(1) Location Zones
218 Aft Cargo
303/403 Wing Inboard Leading Edge
C. Procedure
S 424-104
CAUTION: DO NOT TURN, PULL, OR ATTACH THE SENSOR ELEMENT WITH A CLAMP.
_______ DO NOT MAKE SERVICEABLE KINKS, BENDS, OR DENTS STRAIGHT. IF YOU MAKE SERVICEABLE KINKS, BENDS, OR DENTS STRAIGHT, DAMAGE CAN OCCUR.
(1)
Carefully put the sensor element in its position.
S 024-040
(2)
Remove the caps from the end fittings.
S 424-041
(3)
Loosely install one end fitting in the flange fitting.
S 424-042
(4)
Bend the sensor element to the contour of the clamps and loosely install the other end fitting.
S 424-043
(5)
Install the grommets on the sensing element so each is in the center of the mounting clip and the slit of each bushing is on the faces outside of the nearest bend.
S 424-044
(6)
Install the grommets in each mounting clip.
S 024-045
(7)
Mounting clips and grommets must attach to the element tightly in fourteen places.
NOTE: If the used sensor element is in its position as a reference,
____
remove it.
S 424-084
(8)
Tighten the jamnuts on the end fittings from 50 to 60 pound-inches.
S 754-052
(9)
Make sure the electrical bond between the element connector shell and the primary structure is correct. Refer to SWPM 20-20-00. The resistance must be less than 0.005 ohm.
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26-18-11
ALL ú ú 02 Page 416 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 424-085
(10)
Use a lockwire on the jamnut-flange fitting and on the end fittings.
S 754-047
(11)
Make sure the end fitting hex is in the hex retainer on the flange fitting before you tighten the jamnut.
S 014-021
(12)
ON AIRPLANES WITH SL 26-28; do the following:
(a)
Install the silicone tubing with the slit facing away from the detector bend.
(b)
Install the lacing tape.
S 424-087
(13)
Loosen and tighten the sensing element in its position if it is necessary.
S 754-049
(14)
Make sure the minimum clearance between the element and structure is
0.50 inch except at mounting clips.
S 754-089
(15)
AIRPLANES WITH SB 26-1060; keep a minimum clearance of 1.0 inch between the sensor and the APU bleed air ducts.
S 424-088
(16)
Install the electrical connectors on the end fitting.
S 424-089
(17)
Install a lockwire to the flange fitting.
S 414-053
(18)
Close the OVHT WHL WELL WING BDY circuit breaker on the panel P6-2.
S 704-054
(19)
Do a Test of the wing and lower aft body overheat detection system (AMM 26-18-00/501).
S 754-093
(20)
A procedure to clear alarm codes from the Fenwall unit is in the Wing and Lower Aft Body Overheat Detection System - Maintenance Practices (AMM 26-18-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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ALL ú ú 02 Page 417 ú Nov 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
WING AND LOWER AFT BODY OVERHEAT DETECTION SENSING ELEMENT -
____________________________________________________________ ADJUSTMENT/TEST
_______________
1. General_______
A. There is one task in this section:
(1) Test the sensing element.
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