Cleaning/Painting of the FWD Cargo-Compartment Door

TASK 52-31-11-100-001-A
Cleaning/Painting of the FWD Cargo-Compartment Door

WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

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

CAUTION: IMMEDIATELY AFTER YOU OPEN THE CARGO COMPARTMENT DOOR, RECORD ON THE WORK CARD ON THE DOOR, THE DATE AND TIME WHEN YOU OPENED IT. IF THE CARGO COMPARTMENT DOOR STAYS OPEN FOR 12 HOURS OR MORE, YOU MUST BLEED THE HYDRAULIC SYSTEM RELATED TO IT. IF YOU DO NOT OBEY THESE PRECAUTIONS, THE DOOR CAN CLOSE SUDDENLY WHEN YOU SET THE DOOR TO "CLOSE". THIS CAN CAUSE DAMAGE TO THE DOOR AND TO THE AIRCRAFT STRUCTURE.

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	BRUSH - BRISTLED
No specific	AR	FILM - MASKING
No specific	AR	PAPER - ABRASIVE (GRADE 320)
No specific	1	SCRAPER - PLASTIC
No specific	1	SCRAPER - WOODEN
No specific	1	VACUUM CLEANER
No specific	AR	WATER - SOAPY SOLUTION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04DAB2)	Primer Epoxy Paint-- Corrosion Inhibiting Structure
(Material No.04JME4)	Top Coat Polyurethane_- Grey Internal Structure
(Material No.08AFA1)	Aqueous Cleaner-Transparent Plastic - -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -
(Material No.10ABC1)	Surface Pretreatment-Light Alloys Chemical Conversion Yellow -
(Material No.12ABE2)	Corrosion Preventive Compound-Water Displacing Oily Film System
(Material No.12AGC2)	Corrosion Preventive Compound-- Soft Film System
(Material No.14CDB1)	Testing Medium-Fuel Leak Detection White Powder -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
825AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-31-13-000-001-A	Removal of the Lining and the Insulation
TASK 52-31-13-400-001-A	Installation of the Lining and the Insulation

3. Job Set-up
Subtask 52-31-11-010-056-A

A. Get Access
(1) Open the FWD cargo compartment door (referred to as cargo door) (Ref. AMM TASK 52-30-00-860-001).
(2) Remove the door lining and the insulation mats from the cargo door (Ref. AMM TASK 52-31-13-000-001) to clean the internal structure.
(3) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position of the cargo door.
(4) Remove the access panel 825AR to clean the door locking mechanism(s) and the adjacent structure.

4. Procedure
Subtask 52-31-11-160-050-A

A. Cleaning of the Structure of the Cargo Door and the Related Vent Door
(1) Remove all loose particles and unwanted material with a VACUUM CLEANER and a dry BRUSH - BRISTLED.
(2) Clean the painted components of the structure of the cargo door and the vent door as follows:
(a) Use a Textile-Lint free Cotton - (Material No.14SBA1) or a brush and carefully clean the internal structure with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Carefully clean the adjacent structure of the door locking mechanism with a lint-free cloth and Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(c) Carefully clean the outer skin of the cargo door with a lint-free cloth and Non Aqueous Cleaner-General - - (Material No.08BAA9) .

NOTE: Make sure that the cleaning agent does not dry on the surface.

(3) Dry the cleaned structure with a dry and clean lint-free cloth or with dry, compressed air.
(4) Make sure that the corners and the recesses are clean of all unwanted and loose material.
(5) Examine the drain valves and drain holes to make sure that they are clean and not blocked.
(6) Remove remaining dirt and all old sealants with a SCRAPER - PLASTIC or SCRAPER - WOODEN.
(7) Apply Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) to the internal structure of the cargo door.
(8) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the vertical and horizontal edge members of the cargo door.

Subtask 52-31-11-160-051-A

B. Cleaning of the six sight glasses.

NOTE: Do not rub the surfaces with dry cloth.

(1) On the access panel 825AR.
(2) Clean the windows with a weak soap solution.
(3) Dry the windows with a lint-free cloth Textile-Lint free Cotton - (Material No.14SBA1) .
(4) If more cleaning is required, apply the Aqueous Cleaner-Transparent Plastic - - (Material No.08AFA1) to clean the windows and dry them with a lint-free cloth Textile-Lint free Cotton - (Material No.14SBA1) .

Subtask 52-31-11-140-050-A

C. Cleaning of the Door Seal
(1) Clean the door seal with a WATER - SOAPY SOLUTION.
(2) Dry the cleaned door seal with a lint-free cloth or with dry compressed air.
(3) Apply Testing Medium-Fuel Leak Detection White Powder - (Material No.14CDB1) to the door seal.

Subtask 52-31-11-110-050-A

D. Cleaning of the Door Locking Mechanism and the Electrical Components
(1) Clean the door locking mechanism as follows:
(a) Clean the subsequent components with lint-free cloth or a brush and Non Aqueous Cleaner-General - - (Material No.08BAA9)

the locking handle with the related flap mechanism,
the locking units,
the drift pin mechanism,
the interlock mechanism,
the vent door mechanism,
the locking and the safety shaft.

(b) Dry the cleaned components with a dry and clean lint-free cloth.
(c) Clean the related bearings of the locking and safety shafts with a dry and clean lint-free cloth.
(d) Apply Corrosion Preventive Compound-Water Displacing Oily Film System (Material No.12ABE2) to the cleaned components of the door locking mechanism.
(2) Clean the electrical components as follows:
(a) Clean the electrical cable looms with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and a lint-free cloth.
(b) Clean all electrical connectors, the terminal block 7526VT (7516VC) and the proximity switches 28WV and 5MJ with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) and lint-free cloth.

Subtask 52-31-11-370-050-A

E. Painting Procedure
(1) Remove minor damage of the paint top coat with PAPER - ABRASIVE (GRADE 320).

NOTE: For repair of major paint damage refer to 51-75-12-300-00100.

(2) Make sure that the edge of the serviceable paint area is feathered to the repair area.
(3) Clean the repair area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and lint-free cloth.
(4) Put FILM - MASKING to the adjacent area.
(5) Apply Surface Pretreatment-Light Alloys Chemical Conversion Yellow - (Material No.10ABC1) to the metal surface of the repaired area and let it dry.
(6) Apply Primer Epoxy Paint-- Corrosion Inhibiting Structure (Material No.04DAB2) to the prepared area and let it dry.
(7) Apply Top Coat Polyurethane_- Grey Internal Structure (Material No.04JME4) to the primer and let it dry.
(8) Remove the masking material.

Subtask 52-31-11-210-056-A

F. Operational Test
(1) Operate the locking handle to make sure that the door locking mechanism of the cargo door is serviceable.
(2) Make sure that the receptacles of the door lining attachment are serviceable.

5. Close-up
Subtask 52-31-11-410-055-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the door lining and insulation mats to the cargo door (Ref. AMM TASK 52-31-13-400-001).
(3) Install the access panel 825AR on the cargo door.
(4) Close the FWD cargo door (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:27:51 UTC