W DOC AIRBUS | AMM A320F

Special Detailed Inspection (HFEC) of Lower Skin of Longitudinal Lap Joint at Stringer 18LH and Stringer 18RH, in Runout Area at FR42, Internal

TASK 53-31-00-220-004-A
Special Detailed Inspection (HFEC) of Lower Skin of Longitudinal Lap Joint at Stringer 18LH and Stringer 18RH, in Runout Area at FR42, Internal

ZONE: 241
ZONE: 242
1. Reason for the Job
Refer to the MPD TASK: 533138-02
SPECIAL DETAILED INSPECTION (HFEC) OF LOWER SKIN OF LONGITUDINAL LAP JOINT AT STRINGER 18 LH AND STRINGER 18 RH, IN RUNOUT AREA AT FR 42, INTERNAL

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. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
241
CENTER PASSENGER COMPARTMENT
242
CENTER PASSENGER COMPARTMENT
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 24-42-00-861-001-A
Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A
De-energize the Ground Service Network Supplied from the External Power
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 25-80-00-000-001-A
Removal of the Insulation Blankets
TASK 25-80-00-400-001-A
Installation of the Insulation Blankets
SRM 511100
SRM 512200
NTM 533138
SRM 51730000
 (for corrective action)
SRM 51740000
 (for corrective action)
SRM 51751200
 (for corrective action)
SRM 53311101
 (for corrective action)
SRM 53311102
 (for corrective action)
F Internal Lower Skin of Longitudinal Lap Joint at Stringer 18 LH and RH, in Runout at FR42
3. Job Set-up
Subtask 53-31-00-860-056-A
A. Aircraft Maintenance Configuration
   (1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
Subtask 53-31-00-010-081-A
B. Get Access
   (1) Remove the necessary upper sidewall panels LH/RH in the area of FR42 and FR43 (Ref. AMM TASK 25-23-43-000-001).
   (2) Remove the necessary insulation blankets in the area of STGR18 LH/RH at FR42 (Ref. AMM TASK 25-80-00-000-001).
Subtask 53-31-00-860-058-A
C. Preparation of the Inspection Areas
   (1) Make sure that the surfaces 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 the Non Aqueous Cleaner-General - - (Material No.08BAA9) and a Textile-Lint free Cotton - (Material No.14SBA1) .
   (3) Make sure that the inspection areas are dry before you continue.
   (4) If necessary, make the surface of the inspection areas smooth with the CLOTH-EMERY (GRADE 280) .
   (5) Do a visual inspection of the surface of the inspection areas. Look for damage and defects in the shape of the surfaces.
   (6) If you find damage:
     (a) Refer to the ASRM SRM 511100 for the classification of the damage.
     (b) If you find corrosion damage:
  • refer to the ASRM SRM 512200 for the general corrosion data
  • refer to the ASRM SRM 51740000 for the repair of the corroded areas.
     (c) If you find other types of damage:
  • refer to the ASRM SRM 51730000 for the repair of the minor damage.
4. Procedure
Subtask 53-31-00-220-056-A
A. Special Detailed Inspection
   (1) Do the special detailed inspection NTM 533138 of the internal lower skin of the longitudinal lap joint at the stringers 18 LH/RH. Do this at the stringer runout area at FR42.
NOTE: If the inspection areas are painted, before you do the inspection you must:
  • refer to the procedure steps in the NTM 533138, 'Preparation for Inspection'
  • measure the thickness of the paint at the inspection areas
  • make sure that the paint thickness is less than the given limit.
   (2) Write a report if you find damage during the inspection procedure.
   (3) If you find damage:
     (a) Refer to the ASRM SRM 511100 for the classification of the damage.
     (b) If you find corrosion damage:
  • refer to the ASRM SRM 512200 for the general corrosion data
  • refer to the ASRM SRM 51740000 for the repair of the corroded areas.
     (c) If you find other types of damage:
  • refer to the ASRM SRM 51730000 for the repair of the minor damage
  • refer to the ASRM SRM 53311101 for the allowable damage limits
  • refer to the ASRM SRM 53311102 for the correct repair procedure.
5. Close-up
Subtask 53-31-00-370-052-A
A. Repair of the Surface Protection
   (1) If necessary, refer to the ASRM SRM 51751200 and repair the paint coatings in the inspection areas.
Subtask 53-31-00-410-079-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the insulation blankets in the area of STGR18 LH/RH at FR42 (Ref. AMM TASK 25-80-00-400-001).
   (3) Install the upper sidewall panels LH/RH in the area of FR42 and FR43 (Ref. AMM TASK 25-23-43-400-001).
Subtask 53-31-00-860-057-A
C. Put the aircraft back to its initial configuration.
   (1) De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).
[Rev.10 from 2021] 2026.04.02 06:29:06 UTC
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