TASK 53-25-41-400-001
Installation of the FWD Emergency-Exit Scuff-Plate
1. Reason for the Job
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Self Explanatory
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
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No specific scotch brite
No specific vacuum pump
No specific vacuum valve
B. Consumable Materials
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No specific adhesive tape
No specific porous material
Material No. 05-013A C Z-24.223
RELEASE AGENT (Ref. 20-31-00) Material No. 05-068 D 80-T-31-2910 VACUUM FOIL (Ref. 20-31-00) Material No. 08-065 USA MIL-T-60394 TYPE I CLASS I DOUBLE SIDED ADHESIVE TAPE (Ref. 20-31-00) Material No. 09-005 USA MIL-S-81733 CLASS C CORROSION INHIBITIVE INTERFAY SEALANT (Ref. 20-31-00)
Material No. 09-016 USA MIL-PRF-81733D TYPE II CLASS B
CORROSION INHIBITING FILLET CONSISTENCY
(Ref. 20-31-00)
Material No. 09-030 D 80-T-50-4005 SEAL TAPE (Ref. 20-31-00) R Material No. 11-003 USA ASTM D 740 METHYL-ETHYL-KETONE (Ref. 20-31-00) Material No. 19-003 USA AMS 3819 LINT-FREE COTTON CLOTH (Ref. 20-31-00)
C. Referenced Information
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52-22-00-410-002 Closing of the Emergency Exit Doors from the Outside 53-25-41-991-001 Fig. 401 53-25-41-991-002 Fig. 402
3. Job Set-up
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Subtask 53-25-41-869-050
A. Aircraft Maintenance Configuration
(1)
Make sure that the access platform is in position.
(2)
Make sure that the applicable emergency exit door is open.
Subtask 53-25-41-110-050
B. Preparation for Installation
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.
WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THE SPECIAL
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MATERIAL.
THIS MATERIAL IS DANGEROUS.
(1)
Clean the contact surfaces of the scuff plates and the fuselage skin with CLEANING AGENTS (Material No. 11-003) and MISCELLANEOUS (Material No. 19-003).
(2)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(3)
Do an inspection of the component interface and/or the adjacent area.
(4)
Put the vacuum equipment adjacent to the required emergency exit. NOTE : We recommend that you use a strong vacuum pump for attachment
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of the scuff plates.
4. Procedure
_________ Subtask 53-25-41-420-050
A. Installation of the Scuff Plates
(Ref. Fig. 401/TASK 53-25-41-991-001, 402/TASK 53-25-41-991-002)
(1) Drilling of the scuff plates NOTE : This procedure is applicable only when you install new scuff
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plates.
(a)
Put the scuff plates (3), (5) and (9) in position on the door sill.
(b)
Drill the attachment hole of the scuff plates to the final diameter of 4.8 mm (0.1889 in.).
(c)
Remove and deburr the scuff plates (3), (5) and (9).
(2)
Make the top coat of the scuff plates (3), (5) and (9) rough with scotch brite on an area of:
-15 mm (0.5905 in.) width on the scuff plate periphery,
-20 mm (0.7874 in.) radius around each fastener hole.
(3)
Clean the rough area with CLEANING AGENTS (Material No. 11-003) and MISCELLANEOUS (Material No. 19-003).
(4)
Apply adhesive tape on the rough area of the scuff plates.
(5)
Apply a thin layer of SPECIAL MATERIALS (Material No. 05-013A) to the remaining inner areas of the scuff plates (3), (5) and (9).
(6)
Remove the adhesive tape from the scuff plates (3), (5) and (9).
(7)
Apply a thin layer of SEALANTS (Material No. 09-005):
