Fan Major Module
LEAP-1A Cust omer Connect ion
April 5 t h – 7 t h (Rome)
Vincent BOULAY
© 2016 CFM International. CFM, CFM56, LEAP and t he CFM logo are t rademarks of CFM Int ernat ional, a 50/ 50 joint company bet ween Snecma (Safran group) and GE. The information in this document is CFM Proprietary Information and is disclosed in
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Module Overview
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FAN Module Overview
Cross Sect ion
FAN Cont ainement Case
Fan Frame
Engine Kit
Tit anium
out er shroud
Composite shroud
3 Tit anium
OGV st rut s
41 Aluminum
OGVs
3 st rut s
Tit anum
OGV st rut s
Fan Blade
3D Composit e
18
boost er ant i ice syst em
9 4 62 1 1 2
112
75
72 96
VBV shroud
Segment and
VBV duct
8 VBV doors
3 St ages LPC
Spool
8 St rut s
Carbon
seal
N°1 bearing rollers
wit h squeeze f ilm
N°2 bearing
balls
Forward Sump
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
Spinner cone
• Wit hout balancing scre ws
• Re duce d ae rodynamic impact
Front Plat form Shroud
• 3D Plat form
• Fan rot or balancing
– 72 posit ions : bolt or bolt and weight
– Holes engraved every 5 posit ion
– Improved balancing soft ware
Front plat form Shroud
Bolt
weight
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key differences from CFM56-5 B
Boos t er
st age 1
vanes
Fan Blades
• 3D Wove n Carbon Composit e
• Tit anium Le ading Edge
Fan blade
Fan blade
plat form
• 18 Blade s wit h large chord
– No lubricat ion in service
Front s hroud plat form
• Fan Blade is classifie d in Chap.5 as
a crit ical part by t he aut horit ie s
Spinner cone
– Fleet Leader Program implement ed
– Airwort hiness approval request ed
for in-service Deviat ion Request
– AMM crit eria available at EIS wit h
5 0 cycles overserviceabilit y
(Cont inued In Service)
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
New Fan Blade Technology vs CFM56  Special condit ion
required by t he aut horit ies because of “significant difference
in mat erial propert y”
Fleet Leader Program for Fan blade implement ed by Service
Bullet in
• Similar SB has be e n applie d on pre vious e ngine s wit h composit e fan
blade s
• Inspe ct ion:
– Inspect ion every 3 0 0 0 cycles
– Different environment al exposure
• 6 blade s re move d pe r e ngine (no balancing const raint )
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
AMM FAN Blade Crit eria
CFM56-5B
LEAP-1 A
CFM56-5B
(mm)
Leading
Edge
Trailing
edge
TIP
Airfoil
LEAP-1 A
(mm)
Leading
Edge
Trailing
edge
TIP
Airfoil
Cracks
NS
NS
NS
NS
Cracks
NS
35
5 to 30
NA
Nicks,
Dent ,
Scrat ches
Dist orsion
0 .1 5 t o
0 .7 6
0 .1 5
1 .0 2
0 .0 8
0 .2 t o
1 .0
0 .2
0 .2
0 .2
8 .64
8 .64
NA
NA
Nicks,
Dent ,
Scrat ches*
Dist orsion
NA
See
cracks
1 .2
NA
Tip curl
6.3 5
original
cont our
6.3 5
original
cont our
NA
NA
Tip curl
See
cracks
See
cracks
See
cracks
NA
Missing
Dovetail
Coating
10% to 50% of flacking
NS = Not Serviceable
NA = Not Applicable
Dove t ail
Missing
Dovetail
Wear strip
Any amount if not worn through
* Crit eria on t he base mat erial
Lack of paint is serviceable
 Init ial AMM se rvice abilit y crit e ria available at EIS t o limit re movals
 CFM is working t o improve t he se crit e ria and will use cust ome rs fe e dback
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
New Fan Blade Mat erial 
Creat ion of fan blade visual
inspect ion guideline
• He lp AMM findings ide nt ificat ion
wit h pict ure s and give a share d
vocabulary
• Docume nt available on myCFM
Port al at EIS
• Will be updat e d wit h cust ome rs
dat as and phot os
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
Fan Blade Plat f orm
• Light we ight St ruct ure
– Polymer Composit e Mat rix
• Doe s not e xist on CFM56-5B
whe re Plat form is int e gral wit h
and part of t he Fan Blade
• QPE = 18
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Fan Plat form
Seals Locat ions
LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
Fan Case
FAN Case
• Carbon Composit e
FAN Abradable
Fwd acoust ic
shroud
• “Minne sot a” – dark gre y color
Forward Acoust ic Shroud
• One pie ce barre l in Carbon Fibe r
– More resist ant t han fiber glass
panels
– On wing repair wit h mat erial filler
in progress
• Fit t e d axially on Fan Case by 1 3
bracke t s
– Fixing at t achment improved versus
CFM56
– Axial fixat ion (screw head not
loaded)
– No conical screws
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Axial fixat ion
LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
Boost er wit h ant i ice syst em
• Pre ve nt ice accre t ion on LPC St age 1,
Vane
• Hot air blown t hrough Flow split t e r
and LPCV1 hole s
– Hot air from HPC St age 7
Hot air
188 not ches
Flow Split t er
Hot air
188 LPTV1
Holes
LPC st age 1
vane
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
FAN Module Overview
Key dif f erences f rom CFM56-5B
Engine Kit
• Support VBV out le t s at t he re ar
of t he fan frame
• Int e rface wit h t he nace lle
• Inward ope ning VBV doors in t he
primary airflow
– Ext ract LPC air inside t he
primary airflow t o cont rol engine
operabilit y
– Reduce FOD in t he HPC
LPC St g4, Vane
VBV Scoop
opened
Flowpat h int o HPC
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
Tes t Experience
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Tes t Experience
Fan Blade
Tip Rub
Leading Edge FOD Impact
Paint Peeling
Wear Strip marks
Block
t est
 All t he findings are wit hin AMM limit s or re pairable on wing
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
Test Experience
Fan Blade
Paint improvement s t o address peeling issues
Development and Compliance Test Design
Paint Peeling
Top coat
Primer
MLE
Sanding
EIS Design : Improve Top Coat adherence
Top coat
Primer
Sanding
AMM Crit eria on EIS Design :
- Missing Black Top Coat = any
amount
MLE
 Improve d de sign and AMM crit e ria available at EIS
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
Test Experience
Fan Blade Plat f orm
Disassembly damage :
Seal damage due t o Erosion observed on Hailst orm Test :
 All f indings wit hin AMM limit s
 Re de sign planne d t o addre ss se al issue s
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
Test Experience
Fan cont ainment case
Erosion
Fan abradable e rosion in icing condit ion can
occur in t he aft part of t he st rip
Good adhesive behavior on composite fan
case proved during cumulated icing test
campaigns
- Wear up to the parent composit
- No large piece of abradable unbonded
Cumulat ed icing t est campaigns up t o
Parent composit
Ext ended crit eria st udies on-going
Part ially repairable on wing or fully in Shop Visit
 Good adhe sion of t he abradable on t re nch fille r : seve re t e st condit ion
(icing, hailst orm, …) didn’t re sult in abradable disbonding
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
Test Experience
Out let Guide Vane
Paint Erosion at LE/TE
platform seal torn
 St ronger
Polyurét hane Seal
implement ed at EIS
 Paint t ouch up
repair available at
EIS
 All t he f indings are wit hin AMM limit s or repairable
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LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
Pos t EIS Improvement
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Post EIS Improvement s
EGT Enhancement
Ident if ied opport unit y t o enhance
EGT margins during development
t est s
EIS Boost er
112
94
75
62
112
72
96
80
106
Modif y Boost er design f or EGT margin
ext ension
• Re blading of Boost e r (Blade s & Vane s)
• Se aling improve ment (Int roduct ion of a
Rot at ing Space r and O-Rings)
• No Change t o Fan De sign or Se condary
Flowpat h
New Boost er availabilit y t arget ed for
mid-2 0 1 7
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New Boost er
126
82
67
85
126
O-ring
Rot at ing spacer
LEAP-1A Cust omer Connect ion Meet ing, Rome, April 5 t h -7 t h 2016
Ques t ions
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