Installation of the Forward Emergency-Exit-Door Scuff-Plates

TASK 53-25-41-400-001-A
Installation of the Forward Emergency-Exit-Door Scuff-Plates

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 231
ZONE: 232

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	1	PUMP - VACUUM
No specific	1	SCOTCHBRITE
No specific	1	SCRAPER - NON METALLIC
No specific	AR	TAPE - ADHESIVE
No specific	1	VALVE - VACUUM

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05PAC1)	Double Sided Adhesive Tape-- Foam Base -
(Material No.06AAA1)	Polysulfide Sealant_General Purpose Brushable -
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.06AAC1)	Polysulfide Sealant-General Purpose Interfay -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14DBB1)	Release Agent-- Liquid Wax -
(Material No.14HCA1)	Film-Bagging for Composite Manufacturing - -
(Material No.14JEA1)	Sealing Profile-Vaccum Bag Sealant - -
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	porous material

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
231	FWD PASSENGER COMPARTMENT
232	FWD PASSENGER COMPARTMENT
833, 843

D. Referenced Information

REFERENCE	DESIGNATION
TASK 52-22-00-010-002-A	Opening of the Emergency Exit Doors from the Outside
TASK 52-22-00-410-002-A	Closing of the Emergency Exit Doors from the Outside
Forward Emergency-Exit-Door Scuff-Plates
Forward Emergency-Exit-Door Scuff-Plates - Installation Procedure ** ON A/C NOT FOR ALL
Forward Emergency-Exit-Door Scuff-Plates - Installation Procedure ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 53-25-41-869-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE is in position at zone 230.
(2) Make sure that forward emergency-exit door 833 or 843 is open (Ref. AMM TASK 52-22-00-010-002).

Subtask 53-25-41-110-050-A ** ON A/C NOT FOR ALL

B. Preparation for the Installation
(1) Remove the unwanted sealant from the fuselage structure and the forward emergency-exit-door scuff-plates with the SCRAPER - NON METALLIC.
(2) Clean the mating surfaces of the forward emergency-exit-door scuff-plates and the fuselage structure with Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(3) Make sure that the forward emergency-exit-door scuff-plates are in the correct condition and are not damaged.
(4) If necessary, replace the damaged forward emergency-exit-door scuff-plate(s).
(5) Do an inspection of the component interfaces and the adjacent area.
(6) Put the PUMP - VACUUM adjacent to the applicable forward emergency-exit door.

NOTE: We recommend that you use a strong vacuum pump for attachment of the forward emergency-exit-door scuff-plates.

4. Procedure
Subtask 53-25-41-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Forward Emergency-Exit-Door Scuff-Plates

Forward Emergency-Exit-Door Scuff-Plates ** ON A/C NOT FOR ALL

Forward Emergency-Exit-Door Scuff-Plates - Installation Procedure ** ON A/C NOT FOR ALL

CAUTION: MAKE SURE THAT YOU INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION. THE SCREWS HAVE DIFFERENT LENGTHS. IF YOU DO NOT INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION, YOU CAN CAUSE DAMAGE.

(1) Drilling of the forward emergency-exit-door scuff-plates:

NOTE: This procedure is applicable only when you install new forward emergency-exit-door scuff-plates.

(a) Put the forward emergency-exit-door scuff-plates (3), (5) and (9) in position on the door sill.
(b) Drill the attachment hole of the forward emergency-exit-door scuff-plates to the final diameter of 4.8 mm (0.1890 in.).
(c) Remove and deburr the forward emergency-exit-door scuff-plates (3), (5) and (9).
(2) Make the top coat of the forward emergency-exit-door scuff-plates (3), (5) and (9) rough with SCOTCHBRITE on an area of:

15 mm (0.59 in.) width on the forward emergency-exit-door scuff-plates periphery
20 mm (0.79 in.) radius around each attachment hole.

(3) Clean the rough area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(4) Apply TAPE - ADHESIVE on the rough area of the forward emergency-exit-door scuff-plates.
(5) Apply a thin layer of Release Agent-- Liquid Wax - (Material No.14DBB1) on the remaining inner areas of the forward emergency-exit-door scuff-plates (3), (5) and (9).

NOTE: If you apply the release agent correctly, the forward emergency-exit-door scuff-plates will not be damaged during the subsequent removal procedure.

(6) Remove the TAPE - ADHESIVE from the forward emergency-exit-door scuff-plates (3), (5) and (9).
(7) Apply a thin layer of Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) or Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) :

On the mating area of the forward emergency-exit-door scuff-plates, on the fuselage structure
On the rough area of the forward emergency-exit-door scuff-plates.

(8) Put the forward emergency-exit-door scuff-plates (3), (5) and (9) in position on the fuselage structure.
(9) Install the washers (4) and the screws (2) and (11) with Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) or Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .
(10) Tighten the screws (2) and (11).
(11) Install the washers (6) and the screws (7) and (8) with Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) or Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) .
(12) Install the nuts (1) and tighten them.
(13) Remove the unwanted sealant around the forward emergency-exit-door scuff-plates (3), (5) and (9).
(14) Apply approximately 30 mm (1.1811 in.) of Sealing Profile-Vaccum Bag Sealant - - (Material No.14JEA1) (10) around the edges of the forward emergency-exit-door scuff-plates (3), (5) and (9).
(15) Put a sheet of porous material on the forward emergency-exit-door scuff-plates (3), (5) and (9).
(16) Attach the porous material to the forward emergency-exit-door scuff-plates (3), (5) and (9) with Double Sided Adhesive Tape-- Foam Base - (Material No.05PAC1) .
(17) Connect the VALVE - VACUUM to the vacuum foil Film-Bagging for Composite Manufacturing - - (Material No.14HCA1) .
(18) Put the vacuum foil Film-Bagging for Composite Manufacturing - - (Material No.14HCA1) on the forward emergency-exit-door scuff-plates (3), (5) and (9) and Sealing Profile-Vaccum Bag Sealant - - (Material No.14JEA1) (10). You must make an an overlap of 30 mm (1.1811 in.) from the edge of Sealing Profile-Vaccum Bag Sealant - - (Material No.14JEA1) (10).
(19) Connect the PUMP - VACUUM to the vacuum valve.
(20) Operate the PUMP - VACUUM as necessary during the sealant cure time (for the sealant cure time, refer to the sealant manufacturer's instructions).
(21) Disconnect the PUMP - VACUUM.
(22) Remove the vacuum foil Film-Bagging for Composite Manufacturing - - (Material No.14HCA1) .
(23) Remove the vacuum valve from the vacuum foil Film-Bagging for Composite Manufacturing - - (Material No.14HCA1) .
(24) Remove the porous material and Sealing Profile-Vaccum Bag Sealant - - (Material No.14JEA1) (10).
(25) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) on the external joints of the forward emergency-exit-door scuff-plates (3), (5) and (9) and around the forward emergency-exit-door scuff-plates (3), (5) and (9).
(26) Remove the unwanted sealant with Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .

5. Close-up
Subtask 53-25-41-942-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close forward emergency-exit door 833 or 843 (Ref. AMM TASK 52-22-00-410-002).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:29:03 UTC