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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 013-011
 (5)  
Open these access panels on the bottom surface of the wings: 572BB, 572EB, 573AB, 581AB, 581EB, 581HB, 581JB, 672BB, 672EB, 673AB, 681AB, 681EB, 681HB, and 681JB.

 S 643-058

 (6)  
Lubricate the flap drive system (Fig. 309).

 S 413-013

 (7)  
Close these access panels on the bottom surface of the wings: 572BB, 572EB, 573AB, 581AB, 581EB, 581HB, 581JB, 672BB, 672EB, 673AB, 681AB, 681EB, 681HB, and 681JB.

 E. Put the Airplane Back to Its Initial Condition
 S 863-044
 (1)  
Do this task to pressurize hydraulic systems No. 1 and 4: "Hydraulic System Pressurization" (AMM 29-11-00/201).

 S 863-045

 (2)  
Put the flap control lever in the UP detent to retract the trailing edge flaps.

 S 863-046

 (3)
Do this task to depressurize hydraulic systems No. 1 and 4: "Hydraulic System Depressurization" (AMM 29-11-00/201).

 S 093-047
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (4)  Do this task: "Body Landing Gear Door Lock Removal" (AMM 32-00-30/201).
 TASK 12-21-20-643-048
 6.  Trailing Edge Flap Power Drive Unit Lubrication_______________________________________________
 A. Consumable Materials
 (1)  
D00633 Grease - BMS 3-33 (recommended)

 (2)  
D00013 Grease - MIL-G-23827 (alternative)

 B. References
 (1)  AMM 32-00-30/201, Landing Gear Door Locks
 C. Access
 (1)  Location Zone
 135 Wing Landing Gear Wheel Well, LH
 136 Wing Landing Gear, RH

 D. Procedure
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 493-055
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL
_______ 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.
 (1)  
Do this task: "Body Landing Gear Door Lock Installation"
 (AMM 32-00-30/201).

 S 643-057

 (2)  
Lubricate the flap drive power drive unit (Fig. 309).

 E. Put the Airplane Back to Its Initial Condition
 S 093-049
 WARNING: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO REMOVE THE
_______ DOOR LOCKS ON THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF YOU DO NOT REMOVE THE DOOR LOCKS CORRECTLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  Do this task: "Body Landing Gear Door Lock Removal"
 (AMM 32-00-30/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-21-20
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

CARRIAGE ATTACHMENT LINK

REMOVE ACCESS PANELS 577BT AND 577ET ON TOP SURFACE OF THE MIDFLAP FOR ACCESS (REF 06-09-08/201)
Inboard Trailing Edge Flap Foreflap, Midflap, and Aftflap
Servicing (Lubrication)
Figure 301 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-21-20
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