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ICAO / Transport Canada Conference Aircraft PanelMontreal, 20-21 September 2006
Engine Deteriorationand Maintenance Actions
Ivan HutterMarketing ManagerGE Aviation
2GE – Aviation; ICAO
20-21 September 2006
• Performance Deterioration
• Maintenance Actions
• Fuel efficient design trends
Measures for fuel and emissions reduction – engines
Engine performance
4GE – Aviation; ICAO
20-21 September 2006
Cruise fuel mileage deteriorates over engine on wing life
• Dirt accumulation
• Mechanical wear & erosion
Cruise fuel mileage deterioration
0 1 2 3 4
Years in service
C
CRZFF
Δ
5GE – Aviation; ICAO
20-21 September 2006
EGT margin (EGTM) to measure engine performance deterioration
Thrust – N1
EGT
EGT to achieve thrustEGT Limit T/O
EGTM
EGTM deterioration
Flight cycles
Goo
d
Cyc
les
SFC
6GE – Aviation; ICAO
20-21 September 2006
What impacts deterioration?
EGTM deterioration
Flight cycles
T/OEGTM
Goo
d
• Flight legs/cycle
• Environmental factors
• Derate
• Overhaul - Workscope planning- Material Quality
• On Wing Maintenance
Maintenance Actions
- Diagnostic trending
- Core wash
8GE – Aviation; ICAO
20-21 September 2006
GE provides diagnostic support for 60% of its operating engines
OperatorAction
TrendingTrending
AlertingAlerting
Fault IsolationFault Isolation
Engine DataEngine Data
GE Product Support
Diagnostic Analysis
9GE – Aviation; ICAO
20-21 September 2006
-3
-2
-1
0
1
2
3
4
5
6
7
24-Jan-2002 13-Feb-2002 05-Mar-2002 25-Mar-2002 14-Apr-2002 04-May-2002 24-May-2002 13-Jun-2002 03-Jul-2002 23-Jul-2002
FLIGHT DATETIME
DEL
TA F
UEL
FLO
W A
T C
RU
ISE
GWFM
TRENDDATA
• Performance shift detected
• Operating limits not approached
• Maintenance actionrecovered 1.3% fuel flow on wingFlight dates
Cru
ise
Fuel
Flo
wIn-flight diagnostic trending to recover fuel efficiency on wing
10GE – Aviation; ICAO
20-21 September 2006
Takeoff EGT Hot Day Margin Vs Flight Date Time
0
10
20
30
40
50
60
5/24/2002 0:00 12/10/20020:00
6/28/2003 0:00 1/14/2004 0:00 8/1/2004 0:00 2/17/2005 0:00 9/5/2005 0:00 3/24/2006 0:00
Flight Date Time
Take
off E
GT
Hot
Day
Mar
gin
(°C
)
Flight cycles
EG
TM
EGTM recovery 5-15οC
Cor
e w
ash
Cor
e w
ash
Keeping the gas path clean improves fuel economy and on wing lifeEngine core wash
11GE – Aviation; ICAO
20-21 September 2006
In-flight diagnostic data show regular core wash delivers fuel economy
Cycles
Cru
ise
Fuel
Flo
w
Det
erio
ratio
n
No core wash
Regular core wash
Goo
d
Aircraft fuel savings~1.3% ~ $200k*
*$2/gallon
TM
12GE – Aviation; ICAO
20-21 September 2006
GE Customer & Product Support assist to optimize fuel efficiency
AMM Core wash updates
• Reduced dry out run
• Idle wash – no dry out- no effluent
• VSV/VBV driver
• Procedural simplification
Program optimization
• Diagnostic solutions
• CRZ FF/TOW benefit
• Environmental impact
• Select procedure
• Determine frequency
CF6
TM
Fuel efficient design trends
14GE – Aviation; ICAO
20-21 September 2006
New generation engines offer big fuel efficiency gains and lower emissions
-15%
Installed thrust
Spe
cific
Fue
l Con
sum
ptio
n
CF6
15GE – Aviation; ICAO
20-21 September 2006
Fuel efficient, balanced design
Hardware • Swept fan aerodynamics• 3D aero HPC airfoils• Advanced alloys,
coatings
Configuration• 80% increase in BPR• 30% increase in OPR • Counter rotating spools
16GE – Aviation; ICAO
20-21 September 2006
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