737-300 400 500 AMM 飞机维护手册 LIFTING AND SHORING(13)

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 B. Procedure
 S 972-022
 (1)  Add the moments about the main gear due to these items:
 -Airplane weight (Fig. 204)
 -Tilted airplane (Fig. 205)
 -Fuel shift (Fig. 206), wind (Fig. 207)
 -Tow vehicle acceleration (Fig. 208)
 -Upgrades (Fig. 209)
 S 972-023
 (2)  
Make sure the sum of these moments is more than +1,000,000 inch-pounds.

 S 972-024

 (3)  
Make sure the dolly has the capacity equivalent to or more than the maximum load of the airplane nose (Fig. 212).

 S 972-025

 (4)  
Use Fig. 213 as an example to do a balance check when you tow the airplane.

 TASK 07-13-00-582-043
 4. Tow the Tilt Airplane
_____________________
 A. Procedure
 S 212-027
 (1)  Make sure all landing gear downlocks are installed.
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A
737-300/400/500MAINTENANCE MANUAL
1.
 FIND THE AIRPLANE CG

2.
 GO UP TO THE AIRPLANE WEIGHT LINE

3.
 GO LEFT TO FIND THE MOMENT

NOTE:  USE WEIGHT AND CG FOR AIRPLANE IN THE CONFIGURATION IT WILL BE IN AT TIME OF TILTING. REFER TO THE WEIGHT AND BALANCE MANUAL TO DETERMINE WEIGHT AND CG.
EXAMPLE:
CG = 19%
WEIGHT = 80,000 LB
MOMENT = +3700

5% 10% 20%  30% 40%
AIRPLANE CG
Moment Due to Airplane Weight Figure 204
T97647
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A

737-300/400/500
MAINTENANCE MANUAL

-3,000

140,000 LB 120,000 LB -2,000 100,000 LB 80,000 LB 60,000 LB
-1,000
MOMENT ABOUT MAIN GEAR3
IN-LB x 10
0` 5` 10`
1.
 FIND THE MAXIMUM ANGLE THE
AIRPLANE IS TO BE TILTED

2.
 GO UP TO THE AIRPLANE WEIGHT

3.
 GO LEFT TO FIND THE MOMENT
_______TILT = 8`

 

EXAMPLE:
WEIGHT = 80,000 LB
MOMENT = -1150

Moment Due to Tilting
Figure 205

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F65268
A
737-300/400/500MAINTENANCE MANUAL
~ MOMENT DUE TO FUEL MOVEMENT WHEN TILTING THE AIRPLANE
-500
-400

~ MOMENT ABOUT MAIN GEAR - 1000 IN-LB

-300
-200
-100
0
NOTE:
FUEL WEIGHT - 1000 LB
1.
 THE MOMENT SHOWN FOR THE WING TANKS ARE FOR BOTH WINGS COMBINED

2.
 A NEGATIVE DELTA MOMENT INDICATES AN INCREASED TENDENCY FOR THE AIRPLANE TO TIP ON TO ITS TAIL

3.
 FUEL DENSITY IS 6.5 LB/GAL

Moment Due to Fuel Movement When Tilting the Airplane Figure 206
T97649
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A

737-300/400/500
MAINTENANCE MANUAL

20  40
WIND VELOCITY - KNOTS
1.
 FIND THE MAXIMUM WIND VELOCITY

2.
 GO UP TO THE LINE

3.
 GO LEFT TO FIND THE MOMENT _______WIND = 11 KNOTS

EXAMPLE: MOMENT = -100
_______TOWING THE AIRPLANE TILTED IN
CAUTION:
HIGH WINDS IS NOT RECOMMENDED.
Moment Due to Wind
　
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