Long Range Cruise Critical Fuel Reserves Ground to Air Miles Conversion
AIR DISTANCE (NM)  GROUND  AIR DISTANCE (NM) 
HEADWIND COMPONENT (KTS)  DISTANCE  TAILWIND COMPONENT (KTS) 
100  80  60  40  20  (NM)  20  40  60  80  100 
286 579 873  263 532 800  244 491 739  227 457 686  213 426 640  200 400 600  189 377 565  179 356 533  169 337 505  161 321 480  154 305 457 
1166 1460 1754  1069 1337 1606  986 1233 1480  915 1144 1373  854 1067 1281  800 1000 1200  753 941 1129  711 888 1065  673 841 1009  639 799 958  609 760 912 
2047 2341 2635  1874 2142 2411  1728 1975 2222  1603 1832 2061  1495 1708 1922  1400 1600 1800  1317 1505 1693  1243 1420 1598  1177 1345 1513  1117 1277 1436  1064 1215 1367 

Critical Fuel (1000 KG)
AIR DIST (NM)  WEIGHT AT CRITICAL POINT (1000 KG) 
45  50  55  60  65  70  75  80  85  90 
200 300 400  1.9 2.7 3.5  2.0 2.8 3.6  2.1 2.9 3.7  2.1 3.0 3.8  2.2 3.1 4.0  2.3 3.2 4.1  2.4 3.3 4.2  2.4 3.4 4.4  2.5 3.5 4.5  2.6 3.5 4.5 
500 600 700  4.2 5.0 5.8  4.4 5.2 6.0  4.5 5.4 6.2  4.7 5.5 6.4  4.8 5.7 6.6  5.0 5.9 6.8  5.2 6.1 7.0  5.3 6.3 7.2  5.5 6.5 7.4  5.5 6.5 7.5 
800 900 1000  6.6 7.3 8.1  6.7 7.5 8.3  7.0 7.8 8.6  7.2 8.0 8.8  7.4 8.3 9.1  7.7 8.5 9.4  7.9 8.8 9.7  8.2 9.1 10.0  8.4 9.4 10.3  8.5 9.5 10.5 
1100 1200 1300  8.9 9.7 10.4  9.1 9.8 10.6  9.4 10.2 10.9  9.7 10.5 11.3  10.0 10.8 11.7  10.3 11.2 12.0  10.6 11.5 12.4  10.9 11.9 12.8  11.3 12.2 13.2  11.5 12.5 13.4 
1400 1500 1600  11.2 12.0 12.8  11.4 12.1 12.9  11.7 12.5 13.3  12.1 12.9 13.7  12.5 13.3 14.1  12.9 13.7 14.6  13.3 14.1 15.0  13.7 14.6 15.5  14.1 15.0 15.9  14.4 15.3 16.3 
1700 1800  13.5 14.3  13.7 14.5  14.0 14.8  14.5 15.3  14.9 15.8  15.4 16.2  15.9 16.7  16.4 17.3  16.8 17.8  17.2 18.2 

Based on:  Emergency descent to 10000 ft. Level cruise at 10000 ft.  250 KIAS descent to 1500 ft.  15 minute
hold at 1500 ft.  One missed approach; approach and land.  5% allowance for wind errors.
Increase fuel required by 0.5% per 10°C above ISA.
If icing conditions exist, increase fuel by 14% to account for engine and wing anti-ice on (7%) and ice accu-mulation on unheated surfaces (7%).
Allowance for performance deterioration not included.
Compare the fuel required for all engine and engine inoperative critical fuel reserves and use the higher of
the two.

Copyright . The Boeing Company. See title page for details.
737-900/CFM56-7B26

Performance Dispatch
FAA
Enroute
Category G Brakes
737 Flight Crew Operations Manual

MAX CONTINUOUS THRUST
Long Range Cruise Critical Fuel Reserves Ground to Air Miles Conversion
AIR DISTANCE (NM)  GROUND  AIR DISTANCE (NM) 
HEADWIND COMPONENT (KTS)  DISTANCE  TAILWIND COMPONENT (KTS) 
100  80  60  40  20  (NM)  20  40  60  80  100 
290 588 887  266 538 810  246 495 745  228 459 689  213 427 642  200 400 600  188 376 564  178 355 531  169 336 502  160 318 477  153 303 453 
1186 1484 1783  1081 1353 1625  994 1243 1493  920 1150 1381  856 1070 1284  800 1000 1200  751 939 1126  708 885 1061  669 836 1003  635 793 951  604 754 904 
2081 2380 2679  1897 2169 2440  1742 1992 2241  1611 1841 2072  1498 1712 1926  1400 1600 1800  1314 1502 1689  1238 1415 1591  1170 1337 1504  1109 1268 1426  1055 1205 1355 

Critical Fuel (1000 KG)
AIR DIST (NM)  WEIGHT AT CRITICAL POINT (1000 KG) 
45  50  55  60  65  70  75  80  85  90 
200 300 400  1.7 2.4 3.1  1.8 2.5 3.2  1.9 2.6 3.4  2.0 2.7 3.5  2.0 2.8 3.6  2.1 3.0 3.8  2.2 3.1 3.9  2.3 3.2 4.1  2.3 3.3 4.2  2.4 3.3 4.3 
500 600 700  3.8 4.5 5.1  3.9 4.6 5.4  4.1 4.8 5.6  4.3 5.1 5.8  4.5 5.3 6.1  4.6 5.5 6.3  4.8 5.7 6.5  5.0 5.9 6.8  5.1 6.1 7.0  5.2 6.2 7.1 
800 900 1000  5.8 6.5 7.2  6.1 6.7 7.4  6.3 7.0 7.8  6.6 7.3 8.1  6.9 7.6 8.4  7.1 7.9 8.7  7.4 8.2 9.1  7.6 8.5 9.4  7.9 8.8 9.7  8.0 9.0 9.9 
　
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