CFM56-5B包H TRAINING MANUAL
FAN BLADE
SCREWS
REAR CONE
CTC-063-014-01
Page 11
EFFECTIVITY
72-20-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
Fan disk
The fan disk outer rim has 36 dovetail recesses for the installation of the fan blades.
The inner front flange has an imprint to identify an offset hole for rear cone installation.
There are also two identification marks engraved on either side of blade recesses No.1 and 5.
Page 12
EFFECTIVITY
72-20-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B包H TRAINING MANUAL
OFFSET HOLE
FAN DISK FRONT FLANGE
CTC-063-015-01
Page 13
EFFECTIVITY
72-20-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
Fan blades
There are 36 titanium alloy, mid-span shrouded fan blades.
Each blade has a dovetail base that slides into a recess on the fan disk outer rim.
A retainer lug, machined at the rear end of the blade root, engages the forward flange of the booster spool and limits axial movements.
A spacer, installed underneath each blade, limits the radial movement.
Page 14
EFFECTIVITY
72-20-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
CFM56-5B包H TRAINING MANUAL
FAN BLADES
CTC-063-016-01
Page 15
EFFECTIVITY
72-20-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
Fan blades (continued)
Each blade has specific indications engraved on the bottom of the root :
- Part number
- Serial number
- Momentum weight
- Manufacturer code
The fan blade root faces have an anti-friction plasma coating (Cu-Ni-In) and a top coat of cured molybdenum-base film varnsh, which acts as a lubricant.
Lubrication of blade roots is further improved by the application of solid molybdenum-base lubricant before installation on the fan disk.
The mid-span shroud contact surfaces have a tungsten-carbide coating. They are also lubricated with solid molybdenum-base lubricant at blade installation.
Page 16
EFFECTIVITY
72-20-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION
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