757 Airplane Recovery Document 飞机恢复文件(71)

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B.  You can use a jack at the forward (auxiliary) jack point to lift the nose of the airplane. If you use this point, the jack load must not be more than 26,900 pounds (12200 kg).
C.  Pneumatic bags are an alternative to jacks. After you have a sufficient height with the bags, you must put the airplane on jacks (or cribs). Remove the bags after the airplane is on the jacks (or cribs). Bag locations and limits (allowable surface bearing loads) are shown in Figure 3-49.
4.  When You Lift the Airplane with Two Main Gear Folded
(see Figure 3-20 or Figure 3-25)

A.  Pneumatic bags are your first alternative when you have this condition. It is necessary to have sufficient clearance and a level surface below the airplane. Remove material if it is necessary to get this clearance. Use supports (or cribbing) as a safety precaution. Use
tethers carefully.
B.  Cranes and slings are also an alternative when you have this condition. In this alternative, you lift the airplane using the main landing gear trunnion and hoist equipment B07009.
C.  Remove the top panel on the wing to access the main landing gear trunnion from above.
D.  You must use hoist equipment B07009 to lift from the trunnion. This tool is designed to prevent damage to the main landing gear trunnion and to distribute the lifting loads properly. Use of alternative lifting equipment may result in damage to the trunnion surface and will not provide for safe distribution of the lifting load.
E.  After you install the B07009 hoist equipment use cranes to lift the airplane. Use one crane for each side of the airplane. Also, use a third crane to attach lifting sling F70244 (or equivalent) to provide the necessary fore and aft stability to the airplane during the lift (see SUBJECT 3-30-13 for additional details on lifting the airplane with cranes).
3-30-3

WHEN YOU LIFT THE AIRPLANE FROM VARIOUS POSITIONS Page 3-41 Jul 01/2005
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5.  When You Lift the Airplane with a Folded Main Gear on One Side (see Figure 3-20 or Figure 3-26)
A.  Remove the fuel from the wing tanks on the side of the airplane that has the folded gear. This removes a large quantity of weight from that side. You can also move the fuel on this side to the tanks on the opposite side of the airplane. This moves the CG of the airplane in the direction of the opposite wing. This permits you to lift the airplane with a smaller force.
6.  When You Lift the Airplane with a Folded Nose Gear and a Folded Main Gear on One Side (see Figure 3-22 or Figure 3-27)
A.  Remove the fuel from the wing tanks on the side of the airplane that has the folded main gear. You can also move the fuel on this side to the tanks on the opposite side of the airplane. Each of these two procedures help you lift the airplane.
7.  When You Lift the Airplane with All Gears Folded (see Figure 3-23 or Figure 3-28)
A.  This condition is usually the hardest because your available clearance is at a minimum.
　
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