757 Airplane Recovery Document 飞机恢复文件(81)

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CHECK THE FUSE PINS ON THE GEAR, SEE SECTION 2-10.
I. Jack Procedures, Airplane With a Folded Nose Gear
(1)  
Use a jack at each of the primary jack pads on the wing and at the forward body jack point. See Figure 3-42 and Figure 3-43 for examples of jacking when minimum jack clearance is available and using the forward body jack point. See the data for an airplane that does not have a level attitude or that has a level attitude (SUBJECT 3-30-4).

(2)  
Continue to put supports (cribbing) below the forward fuselage while you lift the airplane or you can use pneumatic elevators.

NOTE:  YOU CAN ALSO MAKE A SUPPORT CRADLE THAT HAS PADS. THIS CRADLE MUST CONFORM TO THE LOWER CONTOUR OF THE FUSELAGE AT EACH FRAME STATION. THIS CRADLE HOLDS THE NOSE OF THE AIRPLANE WHILE YOU ALIGN THE JACKS OR WHILE YOU INSTALL MORE SUPPORTS (CRIBBING) AT THE NOSE PAD.

(3)  
While you lift the nose of the airplane, you must make the aft fuselage stable with a tail jack. Then decrease the height of the tail jack while you lift the nose of the airplane above a level attitude. This keeps the airplane stable and prevents a movement to a tail-down position.

J.
Jack Procedures, Airplane With a Folded Main Gear

(1)  
Use a jack at the main jack point on the low wing. Do this while the airplane is held by the main gear on the opposite wing (see SUBJECT 3-30-4). If it is possible, remove the fuel from the low wing to decrease the load.

(2)  
Lift the airplane to the height that is necessary to extend and lock the gear or to replace the gear. Possibly, you must put a truck (or some other equipment) below the airplane to move it. See Section 4-00 for more data on the movement of the airplane.

3-30-5

IMPORTANT DATA ABOUT THE JACKS
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AIRPLANE RECOVERY DOCUMENT
Figure 3-38 STANDARD AIRPLANE MAINTENANCE JACKS

3-30-5

IMPORTANT DATA ABOUT THE JACKS
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AIRPLANE RECOVERY DOCUMENT
Figure 3-39 LOW-PROFILE RECOVERY JACKS

3-30-5

IMPORTANT DATA ABOUT THE JACKS
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AIRPLANE RECOVERY DOCUMENT
Figure 3-40 LOW PROFILE RECOVERY JACKS, STRUT-TYPE

MODEL  CAPACITY  JACK DIMENSIONS, INCH (MM)  MAX RAM ANGLE DEG [3]  JACK WEIGHT LB (KG) [4]  POWER CART WEIGHT LB (KG) [5] 
NUMBER [7]  Tons  Metric Tons  A [1]  B [2]  C  D  E  F 
8207  80  (72.6)  30  76  12  118  24  42  10  2,200  310 
Standard  (762)  (1930)  (305)  (2997)  (610)  (1067)  (998)  (141) 
Base 
8207  80  (72.6)  30  76  12  118  44  45  10  2,350  310 
　
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