FSIM Troubleshooting Chart 
Figure 102 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
 27-88-00
 ALL  ú ú 01 Page 115 ú Jul 12/99 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
H85938
A 737-300/400/500MAINTENANCE MANUAL 
FAULT  MESSAGE #  PROBABLE CAUSE OF FAULT  FSIM CORRECTIVE ACTION  
SL 2 PROX EXTEND 204  PROXIMITY SENSOR INPUT FAILURE EXTERNAL SLAT 2 EXTEND  2. IF THE PROBLEM CONTINUES, REPLACE THE SLAT PROXIMITY SENSOR (AMM 27-88-11/401). AND PIN 24, OF THE CONNECTOR D728B, AT THE 1. EXAMINE THE CIRCUIT FROM THE RED AND BLUE THE WIRING AS NECESSARY. FSIM (WDM 27-81-12). REPAIR OR REPLACE TERMINALS AT THE PROXIMITY SENSOR, TO PIN 4  
SL 2 PROX FULL EXTEND  205  EXTERNAL SLAT 2 FULL EXTEND PROXIMITY SENSOR INPUT FAILURE  PROXIMITY SENSOR (AMM 27-88-11/401). 2. IF THE PROBLEM CONTINUES, REPLACE THE SLAT 1. EXAMINE THE CIRCUIT FROM THE RED AND BLUE PIN 3 AND PIN 23, OF THE CONNECTOR D728B, REPLACE THE WIRING AS NECESSARY. AT THE FSIM (WDM 27-81-12). REPAIR OR TERMINALS AT THE PROXIMITY SENSOR, TO  
SL 3 PROX EXTEND  206  PROXIMITY SENSOR INPUT FAILURE EXTERNAL SLAT 3 EXTEND  2. IF THE PROBLEM CONTINUES, REPLACE THE SLAT PROXIMITY SENSOR (AMM 27-88-11/401). EXAMINE THE CIRCUIT FROM THE RED AND BLUE AT THE FSIM (WDM 27-81-12). REPAIR OR PIN 6 AND PIN 26, OF THE CONNECTOR D728B, TERMINALS AT THE PROXIMITY SENSOR, TO 1. REPLACE THE WIRING AS NECESSARY.  
SL 3 PROX FULL EXTEND  207  EXTERNAL SLAT 3 FULL EXTEND PROXIMITY SENSOR INPUT FAILURE  IF THE PROBLEM CONTINUES, REPLACE THE SLAT PROXIMITY SENSOR (AMM 27-88-11/401). 2. EXAMINE THE CIRCUIT FROM THE RED AND BLUE PIN 5 AND PIN 25, OF THE CONNECTOR D728B, AT THE FSIM (WDM 27-81-12). REPAIR OR TERMINALS AT THE PROXIMITY SENSOR, TO REPLACE THE WIRING AS NECESSARY. 1.  
SL 4 PROX EXTEND  208  EXTERNAL SLAT 4 EXTEND PROXIMITY SENSOR INPUT FAILURE  2. IF THE PROBLEM CONTINUES, REPLACE THE SLAT PROXIMITY SENSOR (AMM 27-88-11/401). PIN 16 AND PIN 36, OF THE CONNECTOR D728B, EXAMINE THE CIRCUIT FROM THE RED AND BLUE AT THE FSIM (WDM 27-81-12). REPAIR OR TERMINALS AT THE PROXIMITY SENSOR, TO REPLACE THE WIRING AS NECESSARY. 1.  
SL 4 PROX FULL EXTEND  209  EXTEND PROXIMITY SENSOR EXTERNAL SLAT 4 FULL INPUT FAILURE  1. 2. IF THE PROBLEM CONTINUES, REPLACE THE SLAT PIN 15 AND PIN 35, OF THE CONNECTOR D728B, EXAMINE THE CIRCUIT FROM THE RED AND BLUE PROXIMITY SENSOR (AMM 27-88-11/401). AT THE FSIM (WDM 27-81-12). REPAIR OR TERMINALS AT THE PROXIMITY SENSOR, TO OR REPLACE THE WIRING AS NECESSARY.  
SL 5 PROX EXTEND  210  EXTERNAL SLAT 5 EXTEND PROXIMITY SENSOR INPUT FAILURE  IF THE PROBLEM CONTINUES, REPLACE THE SLAT PIN 18 AND PIN 38, OF THE CONNECTOR D728B, 2. 1. PROXIMITY SENSOR (AMM 27-88-11/401). EXAMINE THE CIRCUIT FROM THE RED AND BLUE AT THE FSIM (WDM 27-81-12). REPAIR OR TERMINALS AT THE PROXIMITY SENSOR, TO REPLACE THE WIRING AS NECESSARY. 
FSIM Troubleshooting Chart 
Figure 102 (Sheet 3)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
 27-88-00
 ALL  ú ú 01 Page 116 ú Jul 12/99 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
H86022
A 737-300/400/500MAINTENANCE MANUAL 
FAULT  MESSAGE #  OF FAULT PROBABLE CAUSE  FSIM CORRECTIVE ACTION 
 
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