12-21-20
 ALL  ú ú 05 Page 307 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 823-035
 (8) Adjust the inboard flap, ring spring assemblies one at a time:
 NOTE: Adjust the ring springs after you have lubricated and
____
 installed all four.

 (a)  
Loosen the nut until you can easily turn the ring spring on the bolt.

 (b)  
Tighten the nut sufficiently so that you cannot turn the ring spring by hand, to remove end play.

 (c)  
Tighten the nut one more turn.

 NOTE: The spring will be compressed and additional 0.05-0.06
____ inch from the initial position. The full chamfer of the bolt must extend through the nut.
 The ring spring compression is the difference in the dimension between the retainer and the retaining ring before and after the last adjustment of the nut.
 Do not tighten the nut more to make sure the preload is correct.
 S 413-036
 (9)  Do this task: "Inboard Flap Track Fairing Installation" (AMM 27-51-26/401).
 E. Put the Airplane Back to Its Initial Condition
 S 863-037
 (1)  
Do this task to pressurize hydraulic systems No. 1 and 4: "Hydraulic System Pressurization" (AMM 29-11-00/201).

 S 863-038

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

 S 863-039

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

 TASK 12-21-20-643-040
 5. Trailing Edge Flap Drive System Lubrication
___________________________________________
 A. Consumable Materials
 (1)  
D00633 Grease - BMS 3-33 (recommended)

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

 B. References
 (1)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (2)  
AMM 32-00-30/201, Landing Gear Door Locks

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-21-20
 ALL  ú ú 03 Page 308 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 C. Access
 (1)  Location Zone 135 Wing Landing Gear Wheel Well, LH 136 Wing Landing Gear Wheel Well, RH 572 Landing Gear Support Beam and Rear Spar to Trailing Edge,
 LH 576 Inboard Flap Foreflap, LH 586 Outboard Flap Foreflap, LH 672 Landing Gear Support Beam and Rear Spar to Trailing Edge,
 RH
 676 Inboard Flap Forflap, RH
 686 Outboard Flap Foreflap, RH

 (2)  Access Panel
 572BB Trailing Edge Lwr, LH
 572EB Trailing Edge Lwr, LH
 573AB Inboard Aileron Actuator, LH
 581AB Flap Drive, LH
 581EB Flap Drive, LH
 581HB Flap Drive, LH
 581JB Flap Drive, LH
 672BB Trailing Edge Lwr, RH
 672EB Trailing Edge Lwr, RH
 673AB Inboard Aileron Actuator, RH
 681AB Flap Drive, RH
 681EB Flap Drive, RH
 681HB Flap Drive, RH
 681JB Flap Drive, RH

 D. Procedure
 S 863-041
 (1)  
Do this task to pressurize hydraulic systems No. 1 and 4:
 "Hydraulic System Pressurization" (AMM 29-11-00/201).

 S 863-042

 (2)  
Put the flap control lever in the 30-unit detent to extend the trailing edge flaps.

 S 863-043

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

 S 493-056
 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.
 (4)  Do this task: "Body Landing Gear Door Lock Installation"
 (AMM 32-00-30/201).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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