Aircraft Cleaning after a Hydraulic Fluid Leakage

TASK 51-78-00-615-002-A
Aircraft Cleaning after a Hydraulic Fluid 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	AR	CAP - BLANKING
No specific	1	HOT AIR SOURCE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.08BBF1)	Non Aqueous Cleaner_- Methyl-Ethyl-Ketone -
(Material No.08CKB9)	Cleaner-Hydraulic Spillage Absorbent powder -
(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 -

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
TASK 51-76-11-300-001-A	Repair of the Sealing

3. Job Set-up
Subtask 51-78-00-941-059-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 51-78-00-010-051-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 51-78-00-110-051-A

A. Cleaning Procedure
(1) Remove the hydraulic fluid with a Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Clean the area with Non Aqueous Cleaner_- Methyl-Ethyl-Ketone - (Material No.08BBF1) and a lint-free cloth.
(3) Apply Cleaner-Hydraulic Spillage Absorbent powder - (Material No.08CKB9) to the area, let it stay on the area for 30 minutes.

NOTE: The Met-L-check developer will stay wet if there is unwanted hydraulic fluid.

(4) If necessary, repeat the procedure until the unwanted hydraulic fluid is removed.
(5) Clean the area with the Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and a lint-free cloth.
(6) Flush the area with clean water.
(7) Dry the area with a HOT AIR SOURCE.
(8) If necessary, repair corrosion damage (Ref. AMM TASK 51-74-11-300-001).
(9) If necessary, repair the paint layers (Ref. AMM TASK 51-75-12-300-003).
(10) If necessary, repair the filler seals (Ref. AMM TASK 51-76-11-300-001).
(11) If necessary, apply a layer of 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).
(12) If necessary, apply a layer of 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 51-78-00-410-051-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 01:34:57 UTC