CFM56-7 Performance

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CFM56-7
Performance
CFM56 Operators Conference – May 21 - 22, 2002 CFM Proprietary Data Unauthorized Disclosure Prohibited 2
• CFM56-7B fleet performance retention similar to -3C1 operation
- Initial on-wing margins significantly higher for similar
ratings providing longer on-wing life
• Thrust operation impacts on performance retention
- Slightly lower deterioration rates with 22k and 24k versus 27k rating
• CFM has noted high deterioration rates on –7B fleets that
have not incorporated periodic core wash procedures
- Typical EGT improvement of 10 -15 °c for effective core wash procedures
CFM56-7 Performance Retention
CFM56 Operators Conference – May 21 - 22, 2002 CFM Proprietary Data Unauthorized Disclosure Prohibited 3
CFM56-7B Takeoff EGT Performance Retention Characteristics
0
10
20
30
40
50
60
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Cycles Since Installation
Takeoff EGT - °C
-3C1 Average
24K -7B (A)
26K-7B (A)
26K-7B (B)
22K-7B (C)
22K-7B (D)
27K (E)
27K (F)
27K (G)
27K (H)
CFM56 Operators Conference – May 21 - 22, 2002 CFM Proprietary Data Unauthorized Disclosure Prohibited 4
CFM56-7B Takeoff EGT Performance Retention Characteristics
0
10
20
30
40
50
60
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Cycles Since Installation
Takeoff EGT - °C
-3C1 Average
27K_avg
24k & 26K_avg
22k_avg
Series5
Series13
Transavia 875.201
SW 874.120
Deterioration 2 Sigma Band +/-15 deg c for each rating
CFM56 Operators Conference – May 21 - 22, 2002 CFM Proprietary Data Unauthorized Disclosure Prohibited 5
2001 Year Production EGT Margin
(Both SAC/DAC Models)
Sea Level Corner Point Day Margins
Rating EGT Margin (deg c)
7B27 56
7B26 75
7B24 100
7B22 103
7B20 130
7B18 124

979199501

CFM56-7 Performance

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CFM56-7 Performance