(3)  
Remove the smoke detector assembly (Ref 26-14-11/401).

 S 017-002

 (4)  
Move the lock release mechanism to remove the smoke sensor from the smoke detector assembly.

 (5)  
Put a screwdriver in the slot between the sensor cover and the body.

 (6)  
Twist the screwdriver to release the cover lock.

 S 027-003
 S 027-004
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 26-14-11
 SYSTEM  ú
 ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 701Nov 12/01 

A 737-300/400/500MAINTENANCE MANUAL

FACE PLATE
SCREWS
(2 LOCATIONS)

NOTE: FACE PLATE SCREWS SHOULD BE LOOSENED, BUT NOT REMOVED.
Lavatory Smoke Detector Installation
Figure 701

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 26-14-11
 SYSTEM  ú
 ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 702Mar 15/93 

B82095
A

737-300/400/500
MAINTENANCE MANUAL

SENSOR - SMOKE DETECTOR
SEE A
PULL SENSOR - SMOKE DETECTOROUT
POCKET SCALE
LOCK RELEASE LEVER FOR SMOKE SENSOR
PUSH
LAVATORY SMOKE DETECTOR
SCREWDRIVER SENSOR CELL ASSEMBLY
MESH
SENSOR
ASSEMBLY

COVER
SENSOR COVER
SENSOR - SMOKE DETECTOR A
Lavatory Smoke Detector Cleaning
Figure 702

B82109
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 SYSTEM  ú
 ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 703Nov 12/00 

A
737-300/400/500MAINTENANCE MANUAL
 S 017-010
 (7)  Remove the sensor cover.
 S 027-009 CAUTION: DO NOT TOUCH THE ELECTRODE INSIDE OF THE SENSOR BODY ASSEMBLY.
_______ STATIC ELECTRICITY CAN CAUSE DAMAGE TO THE SENSOR ELECTRODES.
 (8)  
Remove the mesh from the smoke sensor. S 967-006

 (9)  
If the mesh is very dirty, replace it with a new mesh. S 177-007

 (10)
 If the mesh is dirty, wash the mesh with a weak synthetic detergent and luke-warm water.

 S 167-008

 (11)
 After you wash the mesh, dry it with compressed air. S 107-008

 CAUTION:_______DO NOT VIOLENTLY BLOW AIR ON THE SENSOR. STATIC ELECTRICITY CAN CAUSE DAMAGE TO THE SENSOR ELECTRODES.

 (12)
 Lightly blow out the unwanted material from the sensor body with compressed air.

 S 427-009

 (13)
 Install the sensor mesh and the sensor cover. NOTE: Align the cover with the applicable hole in the top of the

____
 body assembly.

 S 427-010
 (14)
 Install the lavatory smoke detector (MM 26-14-11/401). S 717-011

 (15)
 Do a Test of the smoke detection system in the lavatory (AMM 26-14-00/501).

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 26-14-11
 SYSTEM  ú
 ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 704Mar 15/96 

 1.

2.

3.

A
737-300/400/500MAINTENANCE MANUAL
 APU FIRE DETECTION SYSTEM - DESCRIPTION AND OPERATION
_____________________________________________________
General (Fig. 1)
　
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