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-1000 8000
ENGINE BLEED
TO PACKS OFF 1.0 1.0
June 3, 2005
737 Flight Crew Operations Manual
Performance Inflight -
General
737-300/CFM56-3_22K
Copyright © The Boeing Company. See title page for details.
PI.20.23
Assumed Temperature Reduced Thrust (20K Derate)
Maximum Assumed Temperature (Table 1)
Based on 25% Takeoff Thrust Reduction
OAT
(°C)
PRESS ALT (1000 FT) OAT
(°F)
PRESS ALT (1000 FT)
-1 0 1 2 3 4 5 6 7 8 -1 0 1 2 3 4 5 6 7 8
55 74 73 73 130 164 162 162
50 71 71 69 68 66 65 120 159 158 155 153 149 147
45 69 68 67 66 63 62 62 63 65 110 154 153 151 149 144 142 142 143 145
40 66 66 65 64 61 60 60 60 60 62 100 150 148 146 145 140 138 138 137 139 141
35 64 63 62 62 59 58 58 57 59 60 90 146 143 142 141 137 134 133 132 136 137
30 63 61 61 60 58 56 55 55 56 58 80 146 141 140 137 135 131 129 128 131 132
25 63 61 60 58 57 55 54 53 54 55 70 146 141 140 136 134 131 129 127 127 126
20 & 63 61 60 58 57 55 54 53 53 52 60 & 146 141 140 136 134 131 129 127 127 126
BELOW BELOW
June 3, 2005
737 Flight Crew Operations Manual
Performance Inflight -
General
737-300/CFM56-3_22K
Copyright © The Boeing Company. See title page for details.
PI.20.24
Assumed Temperature Reduced Thrust (20K Derate)
Maximum Takeoff %N1 (Table 2)
Based on engine bleed to packs on (Auto) and engine anti-ice on or off
%N1 Adjustment For Temperature Difference (Table 3)
ASSUMED TEMP AIRPORT PRESSURE ALTITUDE (FT)
°C °F -1000 0 1000 2000 3000 4000 5000 6000 7000 8000
75 167 83.0 83.9 83.8 83.5
70 158 84.7 85.6 85.6 85.4 84.9 84.7
65 149 86.6 87.3 87.3 87.2 87.0 87.0 87.1 87.2 87.6 87.9
60 140 88.3 88.9 89.0 89.0 89.1 89.1 89.1 89.0 89.1 89.3
55 131 89.7 90.5 90.6 90.7 91.1 91.3 91.0 90.8 90.7 90.6
50 122 90.4 91.1 91.6 92.3 93.1 93.4 92.9 92.5 92.2 91.9
45 113 91.0 91.6 92.1 92.7 93.9 94.9 94.8 94.2 93.7 93.1
40 104 91.6 92.1 92.6 93.0 94.3 95.3 95.3 95.3 95.0 94.3
35 95 92.0 92.5 93.0 93.4 94.8 95.9 95.9 95.8 95.1 94.5
30 86 91.7 92.8 93.2 93.6 95.0 96.5 96.4 96.4 95.7 95.0
25 77 90.9 92.9 93.7 94.5 95.9 96.5 96.7 96.2 95.6
20 68 90.2 93.8 95.9 95.9
15 59 89.4 95.4
MINIMUM
ASSUMED TEMP
°C (°F)
32(90) 30(86) 28(82) 26(79) 24(75) 29(85) 27(81) 25(77) 20(68) 15(59)
With engine bleed to packs off, increase %N1 by 1.0.
ASSUMED TEMP
MINUS OAT OUTSIDE AIR TEMPERATURE
°C °F °C -40 -20 0 5 10 15 20 25 30 35 40 45 50 55
°F -40 -4 32 41 50 59 68 77 86 95 104 113 122 131
10 18 1.6 1.6 1.6 1.5 1.5 1.5 1.4 1.4 1.4 1.3
20 36 3.3 3.3 3.1 3.1 3.0 3.0 2.9 2.8 2.7 2.6 2.5 2.3
30 54 4.8 4.7 4.6 4.5 4.4 4.3 4.1 3.9 3.7 3.5 3.4 3.3
40 72 6.8 6.1 6.0 5.9 5.7 5.5 5.3 5.1 4.9
50 90 8.1 7.4 7.2 6.9 6.7 6.3
60 108 10.4 9.3 8.4 8.1 7.7
70 126 11.5 10.5 9.0
80 144 12.7 11.4 9.8
90 162 13.8 11.9
100 180 14.5 12.6
110 198 14.9
1. Determine Maximum Assumed Temperature allowed from Table 1.
2. Find Maximum %N1 from Table 2 using the desired assumed temperature (no greater than temperature
from Table 1).
3. Use the difference between assumed temperature and OAT to determine the %N1 adjustment from
Table 3.
4. Subtract %N1 adjustment from Maximum %N1 in Table 2.
June 3, 2005
737 Flight Crew Operations Manual
Performance Inflight -
General
737-300/CFM56-3_22K
Copyright © The Boeing Company. See title page for details.
PI.20.25
Max Climb %N1
Based on engine bleed to packs on (Auto) and anti-ice off
%N1 Adjustments for Engine Bleeds
Go-around %N1
Based on engine bleed to packs on (Auto), engine anti-ice on or off, and wing
anti-ice off
%N1 Adjustments for Engine Bleeds
TAT
(°C)
PRESSURE ALTITUDE (1000 FT)/SPEED (KIAS OR MACH)
0 5 10 15 20 25 30 35 37
250 250 250 280 280 280 .74 .74 .74
50 90.9 91.1 92.5
40 92.0 92.2 93.6 93.3 93.6
30 92.2 93.2 93.5 94.2 94.6 94.7
20 90.6 92.8 94.3 95.0 95.4 95.6 95.7
10 89.1 91.2 93.1 95.1 96.1 96.4 96.6 96.6 96.6
0 87.5 89.6 91.5 93.4 95.5 97.2 97.5 97.5 97.5
-10 85.9 87.9 89.8 91.7 93.7 95.9 97.9 98.4 98.4
-20 84.2 86.3 88.1 90.0 91.9 94.0 96.0 99.0 99.3
-30 82.5 84.5 86.3 88.2 90.1 92.1 94.1 97.0 97.6
-40 80.8 82.8 84.5 86.3 88.2 90.2 92.2 95.0 95.6
-50 79.1 81.0 82.7 84.5 86.3 88.3 90.2 92.9 93.5
BLEED
CONFIGURATION
PRESSURE ALTITUDE (1000 FT)
0 5 10 15 20 25 30 35 37
ENGINE BLEED TO PACKS OFF 0.5 0.5 0.6 0.7 0.8 0.8 0.9 0.9 0.9
PACKS HIGH -0.3 -0.3 -0.4 -0.4 -0.4 -0.4 -0.5 -0.6 -0.6
ENGINE ANTI-ICE ON -0.7 -0.8 -0.9 -1.0 -1.0 -1.0 -1.0 -1.0 -1.0
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