Aircraft Cleaning after a Sewage Leakage

TASK 51-78-00-615-001-A
Aircraft Cleaning after a Sewage Leakage

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

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	BRUSH - NON METALLIC
No specific	AR	CAP - BLANKING
No specific	1	HOT AIR BLOWER OPERATING 40 DEG C(104 F)
No specific	1	SCRAPER - NON METALLIC
No specific	1	VACUUM EQUIPMENT 0 TO 0.4 BAR (6 PSI)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.12ABB1)	Corrosion Preventive Compound-Water Displacing Hard Film -
(Material No.12ABC1)	Corrosion Preventive Compound_Water Displacing Soft Film -
(Material No.12ACB1)	Corrosion Preventive Compound-Heavy Duty Hard Film -
(Material No.12ACC1)	Corrosion Preventive Compound-Heavy Duty Soft Film -
(Material No.12ADB1)	Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film -
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	bicarbonate of soda
No specific	potassium bichromate

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 51-74-11-300-001-A	Repair of Corroded Areas
TASK 51-75-12-300-003-A	Repair of Minor Paint Damage (Topcoat Only)
TASK 51-75-13-916-001-A	Repair to a layer of Moisture-Removing Oil
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound

3. Job Set-up
Subtask 51-78-00-941-058-A

A. Safety Precautions
(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(2) Disconnect the electrical connector from the battery.
(3) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(4) No cleaning solution should be sprayed directly on the electrical connection.

Subtask 51-78-00-010-050-A

B. Get Access
(1) Get access to the area of the leakage.
(2) Remove components from the area you will clean to prevent contamination from water and/or cleaning agents.

NOTE: Make sure that all electrical outlets are covered to protect them from water.

4. Procedure
Subtask 51-78-00-110-050-A

A. Cleaning Procedure

CAUTION: DO NOT USE A METAL SCRAPER TO REMOVE THE UNWANTED MATERIAL. A METAL SCRAPER CAN CAUSE DAMAGE TO THE SURFACE OF THE COMPONENT.

(1) Remove the loose materials with a SCRAPER - NON METALLIC, a VACUUM EQUIPMENT 0 TO 0.4 BAR (6 PSI), or a BRUSH - NON METALLIC.
(2) Flush the area with clean water.
(3) Mix water and 10 % of the bicarbonate of soda or the Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) to make a cleaning solution.
(4) Clean the area with the cleaning solution and a lint-free cloth Textile-Lint free Cotton - (Material No.14SBA1) .
(5) Flush the area with clean water.
(6) Prepare one of the cleaning solutions that follow:

mix water with 5 % potassium bichromate and 0.5 % of the Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1)
or
mix water with 0.5 % of the Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) .

(7) Clean the area with the cleaning solution and a lint-free cloth Textile-Lint free Cotton - (Material No.14SBA1) .
(8) Flush the area with clean water.
(9) Dry the area with a HOT AIR BLOWER OPERATING 40 DEG C(104 F).
(10) If necessary, repair corrosion damage (Ref. AMM TASK 51-74-11-300-001).
(11) If necessary, repair the paint layers (Ref. AMM TASK 51-75-12-300-003).
(12) If necessary, apply a layer of the Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) or Corrosion Preventive Compound-Water Displacing Hard Film - (Material No.12ABB1) or Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) or Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) or Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - (Material No.12ADB1) to the area (Ref. AMM TASK 51-75-13-916-001).
(13) If necessary, apply a layer of the Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) or Corrosion Preventive Compound-Water Displacing Hard Film - (Material No.12ABB1) or Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) or Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) or Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - (Material No.12ADB1) to the area (Ref. AMM TASK 51-75-13-916-002).

5. Close-up
Subtask 51-78-00-410-050-A

A. Close Access
(1) Install all the components that were removed for the cleaning task.
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 01:34:55 UTC