Special Detailed Inspection (HFEC) of Stringer Coupling from Stringer 10 LH/RH to Crown Center Line, FWD and AFT FR47, Internal Surface

TASK 53-31-00-250-801-A
Special Detailed Inspection (HFEC) of Stringer Coupling from Stringer 10 LH/RH to Crown Center Line, FWD and AFT FR47, Internal Surface

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	CLOTH-EMERY (GRADE 280)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 25-23-41-000-001-A	Removal of the Ceiling Panels
TASK 25-23-41-400-001-A	Installation of the Ceiling Panels
TASK 25-23-43-000-001-A	Removal of the Upper Sidewall Panel
TASK 25-23-43-400-001-A	Installation of the Upper Sidewall Panel
TASK 25-23-44-000-001-A	Removal of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-44-400-001-A	Installation of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-47-000-001-A	Removal of the Lining from the Emergency Exit Hatches
TASK 25-23-47-400-001-A	Installation of the Lining on the Emergency Exit Hatches
TASK 25-24-41-000-001-A	Removal of the Overhead Stowage Compartments (OHSC)
TASK 25-24-41-400-001-A	Installation of the Overhead Stowage Compartments (OHSC)
TASK 25-80-00-000-001-A	Removal of the Insulation Blankets
TASK 25-80-00-400-001-A	Installation of the Insulation Blankets
TASK 51-75-12-300-001-A	Repair of Major Paint Damage on Light Alloy and Composite Material
TASK 51-75-12-300-003-A	Repair of Minor Paint Damage (Topcoat Only)
SRM 511100
SRM 512200
SRM 517300
SRM 517400
NTM 533191
Internal Surface of the Stringer Coupling at Forward and Aft Frame 47, from Left and Right Stringers 10 to the Crown Centerline

3. Job Set-up
Subtask 53-31-00-010-134-A

A. Get Access
(1) Remove the overhead stowage compartments (Ref. AMM TASK 25-24-41-000-001).
(2) Remove the linings (Ref. AMM TASK 25-23-41-000-001), (Ref. AMM TASK 25-23-43-000-001), (Ref. AMM TASK 25-23-44-000-001), and (Ref. AMM TASK 25-23-47-000-001).
(3) Remove the insulation blankets (Ref. AMM TASK 25-80-00-000-001).

Subtask 53-31-00-110-134-A

B. Preparation of the Inspection Area
(1) Make sure that the surface of the inspection areas are clean and smooth.

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

(2) If necessary, clean the inspection areas with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) .
(3) If necessary, make the surface of the inspection areas smooth with CLOTH-EMERY (GRADE 280).
(4) Make sure that the inspection areas are clean and dry before you continue.

4. Procedure
Subtask 53-31-00-250-050-A

A. Special Detailed Inspection

Internal Surface of the Stringer Coupling at Forward and Aft Frame 47, from Left and Right Stringers 10 to the Crown Centerline

(1) Do the special detailed inspection (HFEC) of the stringer coupling from STGR10, LH/RH to crown center line, NTM 533191.
(a) For A320 and A321, do this at FR47.
(b) For A319, do this at FR47/51.
(c) For A318, do this at FR47/54.

NOTE: The stringer coupling lengths are different. Thus the number of stringer coupling rivets can increase or decrease. It is necessary to inspect the stringer coupling surface around all the rivet heads.

(2) Make a report of damage during the inspection procedure.
(a) Refer to the SRM 511100 for the classification of the damage.
(b) If you find corrosion damage:

Refer to the SRM 512200 for the general corrosion data.
Refer to the SRM 517400 for the repair of the corroded areas.

refer to the SRM 517300 for the repair of minor damage procedure.

(d) If you find damage which is more than the limits for minor damage:

You must contact Airbus for the necessary corrective action procedure.

5. Close-up
Subtask 53-31-00-370-068-A

A. Repair of the Surface Protection
(1) If necessary, repair the paint coatings in the inspection areas (Ref. AMM TASK 51-75-12-300-003) or (Ref. AMM TASK 51-75-12-300-001).

Subtask 53-31-00-410-131-A

B. Close Access
(1) Make sure that the work areas are clean and clear of tool(s) and other items.
(2) Install the insulation blankets (Ref. AMM TASK 25-80-00-400-001).
(3) Install the linings (Ref. AMM TASK 25-23-41-400-001), (Ref. AMM TASK 25-23-43-400-001), (Ref. AMM TASK 25-23-44-400-001), and (Ref. AMM TASK 25-23-47-400-001).
(4) Install the overhead stowage compartments (Ref. AMM TASK 25-24-41-400-001).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:29:07 UTC