737 AMM 飞机维护手册 LIFTING AND SHORING(7)

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A.  Check that all landing gear downlocks are installed.
B.  Ensure that the dolly caster is fully retracted.
C.  Remove main gear chocks and tow airplane to desired location.
D.  Check airplane main gear wheels if tilted airplane is to remain at location for a period of time.
7.  Lower Airplane Nose
A.  Check that all landing gear downlocks are installed.
B.  Release airplane brakes, if applied.
C.  Remove main gear wheel chocks, if installed.
D.  Raise scoop to clear dolly uplocks. Release uplocks.
E.  Lower dolly smoothly and slowly.
F.  Chock airplane main gear wheels.
G.  Remove lock bar from behind tire and remove dolly.
H.  Connect nose gear torque links.
May 01/76 7-13-0 Page 205 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

Moment Due to Airplane Weight  501 
7-13-0  Figure 204  Nov 01/74 
Page 206 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

501  Moment Due to Tilting 
Nov 01/74  Figure 205  7-13-0 
Page 207 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Moment Due to Fuel Movement  501 
7-13-0Page 208   Figure 206 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 15/71 

501  Moment Due to Tow Vehicle Acceleration 
May 15/71  Figure 208 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  7-13-0 Page 209 

Moment Due to Towing Upgrade  501 
7-13-0  Figure 209  Nov 01/74 
Page 210 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

501  Moment Due to Dolly Restraint 
May 15/71  Figure 210  7-13-0 
Page 211 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

Moment Due to Ballast  501 
7-13-0Page 212   Figure 211 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  May 15/71 

501  Maximum Nose Gear Load 
Nov 01/74  Figure 212 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  7-13-0 Page 213 

AIRPLANE WEIGHT AND LB CG AT TIME OF TILTING *[1] % MAC TOTAL FUEL ON BOARD LB ANGLE OF TILT *[2] ° MAXIMUM GRADE AIRPLANE IS TO BE TOWED UP % MAXIMUM DOWN RESTRAINT DOLLY IS CAPABLE OF LB
MOMENT IN-LB X 10
1.
MOMENT DUE TO AIRPLANE WEIGHT (FROM FIGURE 204) +

2.
MOMENT DUE TO TILTING AIRPLANE (FROM FIGURE 205) -

3.
MOMENT DUE TO FUEL MOVEMENT (FROM FIGURE 206) -

4.
MOMENT DUE TO TOW VEHICLE ACCELERATION (FIGURE 208) -

5.
MOMENT DUE TOWING UPGRADE (FROM FIGURE 209) -

6.
MOMENT DUE TO TOW DOLLY RESTRAINT (FROM FIGURE 210) +

7.
MOMENT DUE TO WIND (FROM FIGURE 207)

TOTAL ITEMS 1 THROUGH 7 + IF TOTAL IS LESS THAN +900 BALLAST MUST BE ADDED

8.
MOMENT DUE TO BALLAST (FROM FIGURE 211) +

TOTAL ITEMS 1 THROUGH 8 + MUST BE GREATER THAN +900
*[1] SEE WEIGHT AND BALANCE MANUAL FOR WEIGHT AND CG INFORMATION. *[2] SEE FIGURE 214 FOR TILT AND CLEARANCE DATA.
Balance Check For Towing Airplane  501 
7-13-0  Figure 213  May 15/71 
Page 214 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

502  Tilting 737-200 for Hangar Door Clearance 
Feb 15/73  Figure 214  7-13-0 
Page 215 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

SHORING
1.  General
A.  Shoring can be accomplished by using contour boards that conform to the lower wing and body surfaces. Contour boards should be made from four thicknesses of 1-inch plywood, laminated together and secured by bolts. The contour surfaces should be padded with 1/2-inch gray felt and covered with 10-ounce canvas duck.
B.  Wing and aft body jacks should be used with wing and/or body shoring. All landing gear downlocks should be installed prior to shoring. The body should be supported at aft body jacking point during shoring of wing or body. Maximum loads at jacking points are tabulated below.
JACKING POINT  MAXIMUM LOAD LBS. 
97,800 GW TO 108,000  108,000 GW OR HIGHER 
RIGHT WING LEFT WING AFT BODY  35,250 35,250 13,700  43,900 43,900 15,950 

GW is gross weight of airplane.
　
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