Special Detailed Inspection (LFEC) of Upper Skin of Longitudinal Lap Joint in Crack Stopper Areas at Stringer 32 LH, between FR 53 (A320) / FR 48 (A321) / FR 57 (A319) / FR 59 (A318) and FR 70 ...

TASK 53-41-00-250-801-A
Special Detailed Inspection (LFEC) of Upper Skin of Longitudinal Lap Joint in Crack Stopper Areas at Stringer 32 LH, between FR 53 (A320) / FR 48 (A321) / FR 57 (A319) / FR 59 (A318) and FR 70 ...

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

ZONE: 150
ZONE: 160
ZONE: 170

1. Reason for the Job
Refer to the ALI TASK: 534105-01
SPECIAL DETAILED INSPECTION (LFEC) OF UPPER SKIN OF LONGITUDINAL LAP JOINT IN CRACK STOPPER AREAS AT STRINGER 32 LH, BETWEEN FR 53 (A320) / FR 48 (A321) / FR 57 (A319) / FR 59 (A318) AND FR 70, STRINGER 32 RH BETWEEN FR 58 (A320/A321) / FR 64 (A319/A318) AND FR 70, AND STRINGER 41 RH, BETWEEN FR 51 (A320) / FR 47.4 (A321) / FR 55 (A319) / FR 57 (A318) AND FR 70, EXTERNAL SURFACE.

NOTE: The effectivity of this task is "ALL". To know if this task is applicable to your aircraft, refer to the ALI task applicability.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ABC1)	Corrosion Preventive Compound_Water Displacing Soft Film -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
160	BULK CARGO COMPARTMENT AFT BULKHEAD OF AFT CARGO COMPARTMENT TO AFT BULKHEAD OF BULK CARGO COMPARTMENT
170	AFT CAB U/FLOOR COMPT AFT BHD OF BULK

D. Referenced Information

REFERENCE	DESIGNATION
TASK 51-78-00-916-001-A	Application of Temporary Protection System (TPS)
SRM 511100
SRM 512200
SRM 512300
SRM 512400
NTM 534105
External Surface of the Upper Skin at the Longitudinal Lap Joint in the Crack Stopper Areas, Left and Right Sides ** ON A/C NOT FOR ALL
External Surface of the Upper Skin at the Longitudinal Lap Joint in the Crack Stopper Areas, Left and Right Sides ** ON A/C NOT FOR ALL
External Surface of the Upper Skin at the Longitudinal Lap Joint in the Crack Stopper Areas, Left and Right Sides ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 53-41-00-010-230-A

A. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the inspection area.

Subtask 53-41-00-110-183-A

B. Preparation of the Inspection Area
(1) Make sure that the inspection area is sufficiently clean to do a satisfactory inspection of the area.
(2) If not, clean the inspection area with Non Aqueous Cleaner-General - - (Material No.08BAA9) and the Textile-Lint free Cotton - (Material No.14SBA1) .
(3) If there is a TPS layer and if it does not let you do a satisfactory inspection, remove the TPS layer. Refer to (Ref. AMM TASK 51-78-00-916-001).
(4) Remove the sealant and/or paint from the inspection area if this is necessary for the Nondestructive Testing Manual (NTM) task.

4. Procedure
Subtask 53-41-00-250-052-A

A. Inspection
(1) Do a special detailed inspection (LFEC) of the external surface of the upper skin. Do this inspection at the longitudinal lap joint in the crack stopper areas, for damage and discontinuities. Refer to NTM 534105.
(a) On the left side:

For A318, do this inspection at stringer 32 between FR59 and FR70.
For A319, do this inspection at stringer 32 between FR57 and FR70.
For A320, do this inspection at stringer 32 between FR53 and FR70.
For A321, do this inspection at stringer 32 between FR48 and FR70.

(b) On the right side:

For A318, do this inspection at stringer 32 between FR64 and FR70 and at stringer 41 between FR57 and FR70.
For A319, do this inspection at stringer 32 between FR64 and FR70 and at stringer 41 between FR55 and FR70.
For A320, do this inspection at stringer 32 between FR58 and FR70 and at stringer 41 between FR51 and FR70.
For A321, do this inspection at stringer 32 between FR58 and FR70 and at stringer 41 between FR47.4 and FR70.

(2) Make a report of the damage after the NTM inspection:
(a) Corrosion damage:
If you find corrosion, refer to the Structural Repair Manual ( SRM 512200) for the corrosion types, inspection, removal and subsequent corrosion protection.
(b) Other damage (scratches, cracks, gouges, dents, creases):
If you find this type of damage, refer to the Structural Repair Manual ( SRM 511100) for the damage types, classification and corrective action.

Subtask 53-41-00-910-051-A

B. Sealant or Paint Application
(1) If the NTM procedure asked to remove the sealant and/or paint from the inspection area, apply sealant ( SRM 512400) or paint ( SRM 512300) on the inspection area.

Subtask 53-41-00-916-122-A

C. Check and Application of the TPS Layer
(1) If the TPS was removed at the ”Preparation of the Inspection Area”, apply a new layer of Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) (Ref. AMM TASK 51-78-00-916-001).
(2) If the TPS was not removed at the ”Preparation of the Inspection Area”, do a check of the condition and integrity of the TPS layer (Ref. AMM TASK 51-78-00-916-001).
(3) If the TPS layer has local damage, remove the damaged TPS layer and apply a new layer of Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) (Ref. AMM TASK 51-78-00-916-001).

5. Close-up
Subtask 53-41-00-410-224-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:29:13 UTC