THE SHOCK STRUT.
 (a)  
Use the manifold assembly or the strut inflation tool to pressurize the shock struts through the air valves.

 (b)  
Add gas (nitrogen or dry air) until dimension X is approximately 13.00 inches.

 S 613-051
 (10) Adjust each shock strut until each pressure agrees with the servicing chart:
 (a)  
Measure dimension X.

 (b)  
Read the air pressure on the pressure gage.

 (c)  
Add or release gas until dimension X and the pressure are in the band on the servicing chart.

 S 843-052
 (11) Close the air charging valve.
 (a)  
Remove the hoses of the service manifold assembly from the air valves.

 (b)  
Tighten the swivel nut to 60-84 pound-inches.

 S 433-053
 (12)
 Install the pressure caps on the air valves of each main gear.

 S 613-024

 (13)
 After 5-10 landings, measure dimension X and read the pressure on the pressure gage of the body landing gear.

 (a)  Add or release gas until dimension X and the pressure are in the band on the servicing chart.
 NOTE: It is not necessary to adjust the wing landing gear and
____ the nose landing gear.
 S 093-029
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASKS BELOW TO REMOVE
_______ THE DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT INSTALL THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (14) Do this task:  "Removal of the Door Locks from the Wing Landing Gear" (AMM 32-00-30/201).
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 12-15-04
 ALL  ú ú 02 Page 306 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 093-030
 (15) Do this task:  "Removal of the Door Locks from the Body Landing Gear" (AMM 32-00-30/201).
 TASK 12-15-04-603-013
 3.  Shock Strut Servicing Fast Check________________________________
 A. General
 (1)  
This task provides a fast check of the landing gear shock struts. This is an interim check for use between the full Pressure/Extension Checks which are found in other tasks. This check will help you determine if the struts are serviceable for dispatch. It must be completed at or near dispatch weight. It is not accurate at or near empty weight.

 (2)  
This task also provides steps to do the minimum servicing necessary to allow the airplane to dispatch.

 B. Access
 (1)  Location Zone
 715 Nose Landing Gear
 735 Wing Landing Gear, LH
 745 Wing Landing Gear, RH
 755 Body Landing Gear, LH
 765 Body Landing Gear, RH

 C. Procedure (Fig. 301)
 S 223-024
 CAUTION: DO A FULL SERVICING TO THE LANDING GEAR ON ALL AIRPLANES WHICH
_______ DO NOT COMPLETE THIS FAST CHECK PROCEDURE CORRECTLY. DO NOT DO THE SERVICING WITH THE DIMENSIONS OF THE FAST CHECK AS AN ALTERNATIVE FOR A FULL SERVICING. A LANDING GEAR WHICH HAS INCORRECT SERVICING CAN HAVE A FAILURE DURING OPERATION.
 (1)  Do a fast check of the landing gear:
 (a)  
Make sure there is no evidence of major fluid leakage.

 (b)  
Make sure each inner cylinder has a minimum extension of 1 inch (25mm) of chrome for each shock strut (nose and main gears).

 (c)  
Make sure the differences between the extended lengths of each inner cylinder is not more than 2 inches.

 (d)  
Read the pressures from the pressure gages on the shock struts.

 NOTE: The pressure gages on the shock struts can be
____ sufficiently accurate for the strut servicing. But, you can use the gages on the servicing equipment for more accuracy.
 (e)  Calculate the pressure differences for the shock struts on the main landing gear.
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