737 Flight Crew Operations Manual
Performance Inflight
General
737-8/LEAP-1B27
FAA
CATB
MN-FLT-OH-201
PI.10.19
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Assumed Temperature Reduced Thrust
%N1 Adjustment for Temperature Difference (Table 3 of 3)
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.
ASSUMED
TEMP MINUS
OAT (°C)
OUTSIDE AIR TEMPERATURE (°C)
-40
-20
0
5
10
15
20
25
30
35
40
45
50
55
115
8.5
110
8.5
105
8.5
100
7.4
95
5.6
8.9
90
4.2
8.9
85
2.8
8.9
80
1.4
7.6
75
0.1
5.9
9.2
70
0.0
4.4
9.2
9.2
65
0.0
2.9
8.6
8.6
8.5
60
0.0
1.4
8.0
8.0
8.0
7.9
55
0.0
0.0
6.1
7.4
7.4
7.3
7.2
50
0.0
0.0
4.5
6.2
6.8
6.8
6.6
6.4
45
0.0
0.0
3.0
4.6
6.2
6.1
6.0
5.8
5.7
40
0.0
0.0
1.5
3.1
4.7
5.5
5.4
5.2
5.1
4.9
35
0.0
0.0
1.6
3.1
4.8
4.8
4.6
4.5
4.4
4.2
30
0.0
0.0
0.1
1.6
3.2
4.1
4.0
3.9
3.8
3.7
3.6
25
0.0
0.0
0.0
0.1
1.6
3.3
3.4
3.3
3.2
3.1
3.0
2.9
20
0.0
0.0
0.0
0.0
0.1
1.7
2.7
2.7
2.6
2.5
2.4
2.4
2.3
15
0.0
0.0
0.0
0.0
0.2
1.8
2.0
2.0
1.9
1.8
1.8
1.7
10
0.0
0.0
0.0
0.0
0.0
0.2
1.4
1.3
1.3
1.2
1.2
1.2
5
0.0
0.0
0.0
0.0
0.0
0.0
0.3
0.7
0.6
0.6
0.6
0.6
0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
October 26, 2021
