757
MAINTENANCE MANUAL

 D. References
 (1)  
AMM 12-15-01/301, Main Gear Shock Strut

 (2)  
AMM 12-15-02/301, Nose Gear Shock Strut

 (3)  
AMM 32-00-20/201, Landing Gear Downlocks

 (4)  
AMM 32-09-02/201, Air/Ground Relays

 (5)  
1-00-041, Weight and Balance Manual, Mean Aerodynamic Cord (4 exit doors with 1 aft cargo door).

 (6)  
1-00-042, Weight and Balance Manual, Mean Aerodynamic Cord (3 exit doors, overwing exits, and 1 aft cargo door).

 (7)  
1-00-043, Weight and Balance Manual, Mean Aerodynamic Cord (4 exit doors with 2 aft cargo doors ).

 E. Procedure
 S 492-002
 (1)  
Make sure that the landing gear downlocks are installed
 (AMM 32-00-20/201).

 S 042-004

 (2)  
If electrical power is supplied to the airplane while it is on jacks, do the step that follows:

 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE FLIGHT MODE
_______ SIMULATION BEFORE YOU LIFT THE AIRPLANE. IN THE FLIGHT MODE, MANY OF THE AIRPLANE SYSTEMS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (a)  Do the deactivation procedure for flight mode simulation (AMM 32-09-02/201).
 S 972-005
 (3)  757-200 AIRPLANES; Make sure that the airplane gross weight and center of gravity (CG) are at the approved limits. The approved limits to lift the airplane are shown in Figure 203.
 NOTE: The airplanes mean aerodynamic cord and center of
____ gravity (CG) can be calculated using the Weight and Balance Manual: Use 1-00-041 for 757 airplanes with 4 exit doors and 1 aft cargo door. Use 1-00-042 for 757 airplanes with 3 exit doors, overwing exits, and 1 aft cargo door. Use 1-00-043 for 757 airplanes with 4 exit doors and 2 aft cargo doors.
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 07-11-01
 ALL  ú ú 01 Page 203 ú Sep 28/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757
MAINTENANCE MANUAL

 S 582-006
 CAUTION: DO NOT LIFT THE AIRPLANE ON JACKS IN WINDS MORE THAN 35 KNOTS.
_______ IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE AIRPLANE CAN OCCUR.
 (4)  Make sure the airplane is turned into the wind if it is possible, when jacking is necessary out of the hangar.
 S 612-007
 CAUTION: DO NOT DEFLATE THE SHOCK STRUTS IF YOU DO A GEAR RETRACTION
_______ TEST. THE SHOCK STRUTS MUST BE FILLED CORRECTLY AND NOT INFLATED ABOVE THE CORRECT PRESSURE. DAMAGE TO THE WHEEL WELL AND SHOCK STRUT WILL OCCUR.
 (5)  If you lift the airplane on jacks for a gear retraction test, do the steps that follow:
 (a)  
Make sure that the nose landing gear shock strut is fully extended and filled to the correct pressure before a gear retraction test (AMM 12-15-02/301).

 (b)  
Make sure that the shock struts of main landing gear is fully extended and filled to the correct pressure before a gear retraction test (AMM 12-15-01/301).

 (c)  
Make sure you have a minimum of 4 inches (102 mm)of tire clearance between the tire and ground surface.

 S 612-008
 CAUTION: MAKE SURE THE AREA BELOW THE AIRPLANE IS CLEAR OF ALL EQUIPMENT
_______ BEFORE YOU DEFLATE THE SHOCK STRUTS. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE AIRPLANE CAN OCCUR.
 (6)  When you lift the airplane on jacks to level or weigh the airplane, or for general maintenance (without the gear retraction test), do the steps that follow.
 NOTE: When you deflate the shock struts, the height that the
____
 airplane has to be lifted, is decreased.

 (a)  
Deflate the shock strut of the nose landing gear
 (AMM 12-15-02/301).

 (b)  
Deflate the shock struts of the main landing gear
 (AMM 12-15-02/301).

 (c)  
Remove the air valve cap from the shock strut.

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