W DOC AIRBUS | AMM A320F

Special Detailed inspection of Keel Beam Box Elliptical Cutout at FR46, LH/RH

TASK 53-31-00-220-007-A
Special Detailed inspection of Keel Beam Box Elliptical Cutout at FR46, LH/RH

ZONE: 147
ZONE: 148
1. Reason for the Job
Refer to the MPD TASK: 533155-03
SPECIAL DETAILED INSPECTION (HFEC) OF KEELBEAM BOX ELLIPTICAL CUTOUT AT FR 46, LH/RH
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific
1
CLOTH-EMERY (GRADE 280)
No specific
1
WARNING NOTICE(S)
 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
147
MAIN GEAR WELL AND HYDRAULIC COMPARTMENT
148
MAIN GEAR WELL AND HYDRAULIC COMPARTMENT
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 32-12-00-010-001-A
Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A
Close the Main Gear Doors after Access
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)
NTM 511008
SRM 511100
SRM 512200
SRM 517300
SRM 517400
NTM 533155
SRM 533611
SRM 51730000
 (for corrective action)
SRM 51740000
 (for corrective action)
F Keel Beam Box Elliptical Cutout at FR46, LH/RH
3. Job Set-up
Subtask 53-31-00-010-090-A
A. Get Access
WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR ARE CLEAR.
   (1) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
   (2) Put the WARNING NOTICE(S) in position to tell persons not to operate the landing gear.
   (3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the MLG compartment.
Subtask 53-31-00-860-063-A
B. Preparation of the Inspection Areas
F Keel Beam Box Elliptical Cutout at FR46, LH/RH
   (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) . Make sure the areas are dry before you continue.
   (3) If necessary, make the surface of the inspection areas smooth with the CLOTH-EMERY (GRADE 280).
   (4) Make sure that the inspection areas are clean and dry before you continue.
   (5) Do a visual inspection of the surfaces of the inspection areas. Look for damage and defects in the shape of the surfaces.
   (6) If you find damage:
     (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.
     (c) If you find other types of damage:
  • Refer to the SRM 517300 for the repair of the minor damage.
4. Procedure
Subtask 53-31-00-220-059-A
A. Special Detailed Inspection Procedure
F Keel Beam Box Elliptical Cutout at FR46, LH/RH
   (1) Do the special detailed inspection NTM 533155 of the elliptical cutout of the keelbeam box at FR46. Do this at the inner and outer edges of the cutout in the side panel LH/RH.
NOTE: If the edge of the cutout is painted, before you do the inspection you must:
  • refer to the procedure steps in the NTM NTM 511008, '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 about the damage you find 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.
NOTE: No repair data is given in the ASRM SRM 533611 for the elliptical cutout in the side panel of the keelbeam at FR46. If you find damage which is more than the limits for minor damage:
  • you must contact AIRBUS INDUSTRIE for the necessary corrective action procedure.
5. Close-up
Subtask 53-31-00-370-055-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 53-31-00-410-088-A
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
   (3) Remove the WARNING NOTICE(S).
   (4) Remove the access platform(s).
   (5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.10 from 2021] 2026.04.02 06:29:06 UTC
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