S 392-086

 (8)  
Do the above steps to seal the single cutouts in primary or intermediate areas. Do not use the seal plate or filler.

 TASK 51-31-01-392-087
 11. Fuel Seal Application
_____________________
 A. References
 (1)  AMM 28-11-00/801, Fuel Tanks - Approved Repair
 B. Procedure
 S 392-088
 (1)  Seal the integral fuel tanks (AMM 28-11-00/801).
 NOTE: The dry bay access panels are sealed with the "Fillet Seal
____ Application" and "Fastener Seal Application" tasks.
 TASK 51-31-01-602-089
 12. Protection of Sealing Materials
_______________________________
 A. Procedure
 S 602-090
 (1)  
Keep the sealing materials away from grease, oil, dirt, metal particles and all unwanted materials.

 S 602-091

 (2)  
After the sealant is tack-free, put a protective cover on the sealing area for protection.

 TASK 51-31-01-392-092
 13. Accelerated Curing
__________________
 A. Equipment
 (1)  Hot air blowers
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-31-01
 ALL  ú ú 01 Page 228 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (2) Heat Lamps
 B. Procedure
 S 392-093
 (1) Use one of these steps to accelerate the cure:
 CAUTION:_______MAKE SURE THE TEMPERATURE IS BELOW 120°F. IF THE TEMPERATURE IS ABOVE 120°F, BUBBLES WILL OCCUR ON THE SEALANT.
 (a)
Use hot air blowers or heat lamps to apply heat to the sealant.

 (b)
Make the airplane structure warm after you apply the sealant.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-31-01
 ALL  ú ú 01 Page 229 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

TABLE II
NOTES

THIS ALTERNATIVE IS NOT PERMITTED FOR MATING SURFACE SEAL, PRE-PACK SEALING, AND WET FASTENER INSTALLATION PROCEDURES.

B YOU MUST APPLY A LAYER OF PRIMER BEFORE YOU APPLY THE SEALANT.
Alternative Sealants Data
Figure 208

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 51-31-01
 ALL  ú ú 01 Page 230 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
H99646
A
747-400 MAINTENANCE MANUAL
 ACOUSTICAL LINERS - MAINTENANCE PRACTICES
_________________________________________
 1. General
 A. This procedure contains these tasks:
 (1)  
Removal of the acoustical liners.

 (2)  
Installation of the acoustical liners.

 TASK 51-32-01-002-001
 2. Acoustical Liner Removal
________________________
 A. Procedure
 S 022-002
 (1)  Remove acoustical tiles as necessary.
 TASK 51-32-01-402-003
 3. Acoustical Liner Installation
_____________________________
 A. Consumable Materials
 (1)  
Solvents:

 (a)  
B00083 Aliphatic Petroleum, TT-N-95 (non-Kevlar acoustic tiles)

 (b)  
B00074 Dry Cleaning Solvent P-D-680 (non-Kevlar acoustic tiles)

 (c)  
B00778 Methyl Ethyl Ketone TT-M-261 (Kevlar acoustic tiles)

 (2)  
Tape:

 (a) G01288 Tape - Double Backed, BMS 5-133, Type II
 B. Access
 (1)  Location Zone
 100 Lower Half of Fuselage
 200 Upper Half of Fuselage

 C. Procedure
 S 112-004
 (1)  Use the solvent to clean the surfaces as follows immediately before you install the tiles:
 NOTE: Clean the surfaces 1 hour or less before you apply the
____
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機維護手冊 結構 STRUCTURES(80)