Repair of the Sealing

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

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	1	SCRAPER - NON METALLIC

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04QAB2)	Coating_- Flexible Structure
(Material No.06AAA1)	Polysulfide Sealant_General Purpose Brushable -
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -
No specific	masking paper
No specific	masking tape

C. Referenced Information

REFERENCE	DESIGNATION
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound

3. Job Set-up
Subtask 51-76-11-941-050-A

A. Get access to the damaged sealant.

4. Procedure
Subtask 51-76-11-110-050-A

A. Repair the Sealing

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 damaged sealant with a SCRAPER - NON METALLIC.
(2) Make a chamfer on the undamaged sealant to give a repair overlap to a minimum width of 12.7 mm (0.5000 in.).
(3) Make the surface of the chamfer rough.
(4) Clean the repair area.
(a) Clean the repair area with Non Aqueous Cleaner-General - - (Material No.08BAA9) or Non Aqueous Cleaner-General - - (Material No.08BAA9) and a lint free-cloth, Textile-Lint free Cotton - (Material No.14SBA1) and let it dry.
(5) Use a BRUSH - NON METALLIC apply the Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) or Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the repair area with an overlap of the undamaged sealant.
(6) Let the sealant become tack-free.

WARNING: DO NOT APPLY ADHESIVE TAPE ON THE PROBES, DUCTS, SENSORS (STATIC, PITOT, TAT, AOA). USE ONLY THE SPECIFIED TOOLS FOR THE PROTECTION OF THE AIRCRAFT. THE SPECIFIED TOOLS:

GIVE THE CORRECT PROTECTION TO THE AIRCRAFT EQUIPMENT,
ARE EASY TO SEE FROM THE GROUND,
ARE EASY TO REMOVE.

IF YOU USE TAPE, THERE IS A RISK THAT SOME TAPE, OR ADHESIVE FROM THE TAPE, WILL STAY ON THE PROBES, DUCTS OR SENSORS. THIS CAN CAUSE INCORRECT INDICATIONS ON THE RELATED COCKPIT INSTRUMENTS.

(7) Apply masking paper and masking tape to the area adjacent to the repair.
(8) Apply the Coating_- Flexible Structure (Material No.04QAB2) to the repair area to a width of 25.0 mm (0.9843 in.) around the repair area.
(9) Let the nylon coating cure for a minimum of 1 hour.
(10) If necessary, apply the surface protection (Ref. AMM TASK 51-75-13-916-002).

5. Close-up
Subtask 51-76-11-942-050-A

A. Removal or Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(3) Make an entry in the aircraft logbook and attach a tag on the captain side stick to tell the crew that:

Protection covers/devices have been installed.

[Rev.10 from 2021] 2026.04.01 05:22:37 UTC