a)  Apply sealant to fill the cracks or replace sealant removed for check (no more steps are necessary).
 3)  If there are cracks that go to the lug surface, do these steps: a) Look for corrosion on the lug surface adjacent to the
 bushing flange.
 NOTE: You can clean the lug surface (in the area
____ of the cracks) with a cloth that is moist with solvent.
 b)  Remove sealant until you can see all of the corrosion.
 c)  If you see corrosion on the lug surface adjacent to the bushing flange, you must replace the bushing and repair the lug surface at or before a subsequent maintenance interval.
 d)  Apply a red witness line or an equivalent identification mark.
 NOTE: This will help you find bushings that will need
____ the compound applied at a subsequent maintenance interval
 e)  Remove 0.10-0.20 inch of sealant at two or more locations (for example, the bottom or outboard side of the bushing) to let the moisture out of the joint when you apply the compound.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-21-01
 ALL  ú ú 02 Page 363 ú Oct 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 f) Apply a spray of compound between the bushing flange and the lug surface. g) Lubricate the joint again to remove all compound from the joint.
 4)  JOINTS THAT HAVE WITNESS LINES (OR AN EQUIVALENT IDENTIFICATION MARK); Do the steps that follow: a) If you see corrosion on the lug surface adjacent to the
 bushing flange, you must replace the bushing and repair the lug surface at or before a subsequent maintenance interval.
 b) Apply a spray of compound between the bushing flange and the lug surface. c) Lubricate the joint again to remove all compound from the joint.
 S 033-081
 WARNING:_______OBEY THE REMOVAL PROCEDURE FOR THE DOOR LOCKS. THE DOORS CAN OPEN AND CLOSE QUICKLY. THE MOVEMENT OF THE DOORS CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (5)  Remove the door locks (AMM 32-00-30/201).
 TASK 12-21-01-613-059
 12. Wing Gear And Doors Lubrication (Fig. 301, 311 through 315)_______________________________
 A.  General
 (1)  This is a Scheduled Maintenance task.
 B.  Standard Tools and Equipment
 (1)  
ZERK gun (grease gun)

 (2)  
Flush gun (grease gun)

 (3)  
Oil Spray Can

 C.  Consumable Materials
 (1)  
B00184 Solvent - BMS 11-7

 (2)  
B01000 Solvent - General Cleaning of Metal (Series 80) (AMM 20-30-80/201)

 (3)  
D00633 Grease - BMS 3-33 (preferred)

 (4)  
D00013 Grease - MIL-G-23827 (optional)

 (5)  
D00165 Grease - Aeroshell 22 (preferred)

 (6)  
D00378 Grease - Mobil 28 (optioanl)

 (7)  
D50005 Grease - Mobil Aviation Grease SHC 100 (optional)

 (8)  
G00009 Compound - Corrosion Inhibiting, LPS-3 per BMS 3-23 (Optional)

 (9)  
C00755 Compound - Corrosion Inhibiting, AV-25 per BMS 3-26 (Optional)

 (10)
 A00359 Sealant - BMS 5-95

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 12-21-01
 ALL  ú ú 02 Page 364 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 D. Access
 (1)  
Location Zone 135 Wing Landing Gear Wheel Well, LH 136 Wing Landing Gear Wheel Well, RH 731 Wing Landing Gear Door, Center Section, Inboard, LH 732 Wing Landing Gear Door, Center Section, Outboard, LH 733 Wing Landing Gear Door, Inboard, LH 734 Wing Landing Gear Door, Outboard, LH 735 Wing Landing Gear, LH 741 Wing Landing Gear Door, Center Section, Inboard, RH 742 Wing Landing Gear Door, Center Section, Outboard, RH 743 Wing Landing Gear Door, Inboard , RH 744 Wing Landing Gear Door, Outboard, RH 745 Wing Landing Gear, RH

 (2)  
Access Panel
 571 Lower Trailing Edge, LH
 671 Lower Trailing Edge, RH

 
　
中國航空網 m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 SERVICING 2(26)