EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
 71-00-58
 ALL  ú ú C01 Page 111 ú Jul 15/98 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL //////////////////////// 
SEE  A  
ACOUSTICAL  
PANELS  
FAN OUTLET  
GUIDE VANES  
PRECOOLER  
FAN AIR INLET  
FAN  
BLADES  
CONICAL  
SPINNER  
REAR CONE  1ST-STAGE  
(REF)  STATOR VANES  
SPLITTER  
FAIRING  
CONICAL  FAN FRAME  
SPINNER  STRUT  
FRONT CONE  
(REF)  
ACOUSTICAL  
PANELS  
ABRADABLE  
SHROUD  
A  
S-M56-PC-0487-(01)-00-B  
Engine Inlet Check  
Figure 108 (Sheet 2) 
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
 71-00-58
 ALL  ú ú C01 Page 112 ú Jul 15/98 
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
EDGE 
FAN BLADE
FWD 
PLATFORM S-M56-MM-0905-(1)-00-B
FAN BLADE CHECK 
1. EQUIPMENT AND MATERIALS
A. PROTECTIVE MAT (2) - RUBBER MANUFACTURER'S ASSOC., GRADE SC43, NEOPRENE SPONGE, 1 INCH THICK, APPROX 3 X 4 FEET WITH WARNING STREAMERS ATTACHED 
2. CHECK FAN BLADES FOR DAMAGE 
A. CHECK THAT START LEVERS ARE IN CUTOFF POSITION. INSTALL DO-NOT-OPERATE IDENTIFIERS.
CAUTION FAILURE TO PROVIDE ADEQUATE PROTECTON MAY ALLOW DAMAGE TO INNER SURFACE OF
_______: 
INLET COWL.
B. INSTALL PROTECTIVE MATS IN LOWER HALF OF INLET COWL. 
C. CHECK FAN BLADES FOR THE FOLLOWING: 
(1) 
FAN TIP SEIZURE IN ABRADABLE SHROUD
(2) 
MID-SPAN SHROUD SHINGLING
_______TO AVOID POSSIBLE INJURY TO HANDS, GLOVES SHOULD BE WORN WHEN ROTATING FAN ROTOR
WARNING: 
BY HAND.
____ SHINGLING IS DIFFICULT TO DETECT BY VIEWING FAN DIRECTLY FROM FRONT. TO PROPERLYNOTE:CHECK FOR SHINGLING, MID-SPAN SHROUD INTERFACES MUST BE VIEWED WHILE FAN ROTOR IS 
ROTATED SLOWLY BY HAND IN NORMAL DIRECTION OF ROTATION. 
(3) 
CRACKS OR TEARS IN ANY SURFACE
(4) 
LEADING EDGE DISTORTION
(5) 
NICKS, DENTS, SCRATCHES AND PITS ON ANY SURFACE
(6) 
TIP CURL
 
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