Special Detailed Inspection (LFEC) of Lower Skin of Longitudinal Lap Joint Areas at Stringer 18, between FR 47 (A320)/ FR 47.5 (A321)/ FR 47/51 (A319), FR 47/54 (A318) and FR 64, External Surface, LH/RH

TASK 53-41-00-250-802-A
Special Detailed Inspection (LFEC) of Lower Skin of Longitudinal Lap Joint Areas at Stringer 18, between FR 47 (A320)/ FR 47.5 (A321)/ FR 47/51 (A319), FR 47/54 (A318) and FR 64, External Surface, LH/RH

ZONE: 250
ZONE: 251
ZONE: 252

1. Reason for the Job
Refer to the ALI TASK: 534115-01
SPECIAL DETAILED INSPECTION (LFEC) OF LOWER SKIN OF LONGITUDINAL LAP JOINT AREAS AT STRINGER 18, BETWEEN FR 47 (A320)/ FR 47.5 (A321) /FR 47/51 (A319), FR47/54 (A318) AND FR 64, EXTERNAL SURFACE, LH/RH.

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 5M (16 FT)- ADJUSTABLE

B. Consumable Materials

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

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
250	AFT PASSENGER COMPARTMENT
251	AFT PASSENGER COMPARTMENT
252	AFT PASSENGER COMPARTMENT

D. Referenced Information

REFERENCE	DESIGNATION
SRM 511100
SRM 512200
SRM 512300
SRM 512400
NTM 534115
External Surface of the Lower Skin at the Longitudinal-Lap Joint Areas at Stringer 18, Left and Right Sides ** ON A/C NOT FOR ALL
External Surface of the Lower Skin at the Longitudinal-Lap Joint Areas at Stringer 18, Left and Right Sides ** ON A/C NOT FOR ALL
External Surface of the Lower Skin at the Longitudinal-Lap Joint Areas at Stringer 18, Left and Right Sides ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 53-41-00-010-231-A

A. Get Access
(1) Put the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE in position below the inspection area.

Subtask 53-41-00-110-184-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) Remove the sealant and/or paint from the inspection area if this is necessary for the Nondestructive Testing Manual (NTM) task.

4. Procedure
Subtask 53-41-00-250-053-A

A. Inspection
(1) Do a special detailed inspection (LFEC) of the external surface of the lower skin, on the left and right sides. Do this inspection at the longitudinal-lap joint areas at stringer 18, for damage and discontinuities. Refer to NTM 534115.
(a) For A318, do this inspection between FR47/54 and FR64.
(b) For A319, do this inspection between FR47/51 and FR64.
(c) For A320, do this inspection between FR47 and FR64.
(d) For A321, do this inspection between FR47.5 and FR64.
(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 53-41-00-910-052-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.

5. Close-up
Subtask 53-41-00-410-225-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 06:29:14 UTC