(3)
Use a grommet (NSA 939510) of the correct dimensions for the structure hole.
(4)
Cut the grommet to the correct length. Make sure that the tension of the section is correct and that it is in a position opposite the wire.
4. Procedure
_________ Subtask 20-27-00-911-050
A. Installation of the Grommet WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THIS/THESE
_______ MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES AND GOGGLES.
(1)
Apply a thin, smooth layer of EPOXY RESIN BONDING AND ADHESIVE COMPOUNDS (Material No. 08-10D) on the two surfaces.
(2)
Let it dry for 4 or 5 minutes.
(3)
Push the two surfaces together to bond them.
(4)
Make sure that you apply sufficient force to keep the two surfaces together.
(5)
After 24 hours, you can release the pressure.
(6)
Make sure that the grommet is correctly bonded on all the surfaces.
Grommet - Installation and Dimensions
Figure 201/TASK 20-27-00-991-001
1EFF : ALL 1 20-27-00 Page 203
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5. Close-up
________ Subtask 20-27-00-942-050
A. Put the aircraft back to its initial configuration.
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
ELECTRICAL BONDING - MAINTENANCE PRACTICES
__________________________________________
TASK 20-28-00-912-001
Electrical Bonding of Components with Rivets
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL MATERIALS
_______
ONLY WITH A GOOD SUPPLY OF AIR.
OBEY THE MANUFACTURERS INSTRUCTIONS.
PUT ON PROTECTIVE CLOTHING.
DO NOT GET THEM IN YOUR MOUTH.
DO NOT SMOKE.
DO NOT BREATHE THE GAS.
THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT.
GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific abrasive paper glass type 1
No specific grade 200 emery paper
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 04-012 USA VV-P-236 PURE MINERALVASELINE OR PETRO- LATUM (Ref. 20-31-00)
Material No. 07-001
ELECTRICAL BONDING COATING (BLUE COLOR)
(Ref. 20-31-00)
Material No. 09-001 USA MIL-S-8802 TYPE I CLASS A FUEL TANK SEALANTPOLYSULFIDE (Ref. 20-31-00) R Material No. 09-014 GB AFS 1344 CORROSION INHIBITIVE COATING (Ref. 20-31-00)
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 09-020 GB DTD-900/4549 SINGLE PART CHROMATED JOINTED COMPOUND (Ref. 20-31-00)
Material No. 11-004 USA MIL-T-81533 1.1.1TRICHLOROETHANE (METHYL CHLOROFORM) (Ref. 20-31-00)
Material No. 19-003 USA AMS 3819 LINT-FREE COTTON CLOTH (Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-28-00-869-002 Table of the Maximum Permitted Resistance Values 20-28-00-991-003 Fig. 201
3. Job Set-up
__________
Subtask 20-28-00-110-089
A. Removal of the Grease or Oil from the Contact Areas
(1) Remove all the oil and grease contamination with MISCELLANEOUS (Material No. 19-003) moist with CLEANING AGENTS (Material No. 11-004).
Subtask 20-28-00-120-085
B. Removal of the Surface Protection from the Bonding Areas.
(1)
Protect the area around the area to be treated to keep to a limit the effects of the abrasive.
(2)
Remove the surface protection from the contact (rivet head, structure contact, structure angle, etc.) with abrasive paper glass type 1 grade 200 emery paper. The cleaned areas must be such that after assembly they give a zone between 1 mm (0.0393 in.) and 4 mm (0.1574 in.) around the contact faces.
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