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F65272
A 737-300/400/500MAINTENANCE MANUAL
WEIGHT AIRPLANE  60,000  70,000  80,000  90,000  100,000 THAN MORE 
3IN-LB x 10 MAIN GEAR MOMENT ABOUT  -160  -190  -220  -250  -280 

Moment Due to Tow Vehicle Acceleration
Figure 208

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A 737-300/400/500MAINTENANCE MANUAL

1% 2% 3%
% GRADE
1.
 FIND THE % GRADE (1% GRADE  EQUALS 1-FOOT RISE PER 100 FEET)

2.
 GO UP TO THE AIRPLANE WEIGHT

3.
 GO LEFT TO FIND THE MOMENT _______GRADE = 2%

EXAMPLE: WEIGHT = 80,000 LB MOMENT = -160
Moment Due to Towing Upgrade
Figure 209

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F65277
A

737-300/400/500
MAINTENANCE MANUAL

MOMENT ABOUT MAIN GEAR3
IN-LB x 10
+4000
+2000

2000 4000 6000 8000
POUNDS
1.
 FIND THE MAXIMUM DOWN LOAD THAT THE  DOLLY CAN SAFELY APPLY ON THE NOSE GEAR

2.
 GO UP TO THE LINE

3.
 GO LEFT TO FIND THE MOMENT _______MAX RESTRAINT LOAD = 4150 LB

EXAMPLE: MOMENT = 2030
Moment Due to Dolly Restraint
Figure 210

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A 737-300/400/500MAINTENANCE MANUAL
MOMENT ABOUT MAIN GEAR3
IN-LB x 10
+2000
+1500
+1000
+500

2000 4000 6000
BALLAST WEIGHT - LBS
1. IF BALLAST IS NECESSARY, READ THE MOMENT EFFECT FROM FIGURE 213
EXAMPLE: 1. +MOMENT REQUIRED FROM FIGURE 213 = +200
2. +200 = 600 LB BALLAST AT OR 550 LB BALLAST AT

BALLAST LOCATED ON UPPER DECK FLOOR IMMEDIATELY AFT OF FORWARD ENTRY DOOR
BALLAST LOCATED IN FORWARD CARGO COMPARTMENT FORWARD OF DOOR
Moment Due to Ballast Figure 211
F65278
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A

737-300/400/500
MAINTENANCE MANUAL

NOSE GEAR LOAD - POUNDS

20,000
10,000 140,000 LB 120,000 LB 100,000 LB 80,000 LB 0510 20 30 38

60,000 LB 40
AIRPLANE CG

% MAC
EXAMPLE:  AIRPLANE TOTAL WEIGHT = 80,000 LB % MAC = 19% MAXIMUM NOSE GEAR LOAD = 7700 LB

AIRPLANE WEIGHT AND CG INCLUDE BALLAST (IF USED)
Maximum Nose Gear Load
Figure 212

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A

737-300/400/500
　
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