W DOC AIRBUS | AMM A320F

Repair of the Inlet Cone - VRS1432 [IAE]

TASK 72-38-11-300-011-A
Repair of the Inlet Cone - VRS1432

1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
2
BRUSH - BRISTLED
No specific
AR
BRUSH - BRISTLED, SOFT
No specific
AR
GUN - SPRAY
No specific
AR
MAT - WORK
No specific
AR
OVEN - CURING, PORTABLE
No specific
AR
SCALPEL
No specific
AR
WARNING NOTICE(S)
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.V01-060)
Acetone, Analar grade
(Material No.V01-076)
Methyl Ethyl Ketone, Technical grade
(Material No.V01-124)
Isopropyl Alcohol, Technical grade
(Material No.V02-019)
adhesive tape paper heat resistant masking tape
(Material No.V05-020)
waterproof silicon carbide
(Material No.V05-021)
Waterproof silicon carbide abrasive paper
(Material No.V06-021)
surface inspection fluid
(Material No.V07-007)
two-pack epoxy finish white and catalyst
(Material No.V07-079)
bright aluminium
(Material No.V07-080)
epoxy primer base
(Material No.V07-081)
epoxy primer catalyst
(Material No.V07-082)
thinners
(Material No.V07-117)
epoxy matt finish-black
(Material No.V07-118)
catalyst for gloss finish
(Material No.V07-119)
epoxy gloss finish-white
(Material No.V07-120)
catalyst for matt finish
(Material No.V08-069)
resin
(Material No.V08-077)
cure agent
(Material No.14SBA1)
Textile-Lint free Cotton -
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 70-30-00-918-010-A
Consumable Materials Index
F Repair minor damage of the protection coating on the inlet cone assembly
3. Job Set-up
Subtask 72-38-11-941-056-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) On the center pedestal, on the ENG panel 115VU:
     (a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
   (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
   (3) On the overhead maintenance panel 50VU:
     (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 72-38-11-941-057-A ** ON A/C NOT FOR ALL
B. Put the Ground Support Equipment in Position
   (1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position to give access to the engine intake.
   (2) Put the MAT - WORK in position in the intake cowl.
NOTE: Make sure that the red warning pennants on the workmat can be seen external to the aircraft.
NOTE: Make sure that the workmat has sufficient dimensions to give full protection to the lower half of the intake cowl.
4. Procedure
Subtask 72-38-11-110-052-A ** ON A/C NOT FOR ALL
A. Clean the area to be coated with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-060Acetone, Analar grade or V01-124Isopropyl Alcohol, Technical grade (Ref. AMM TASK 70-30-00-918-010).
Subtask 72-38-11-210-053-A ** ON A/C NOT FOR ALL
B. Visually examine the area for repair to make an estimate of quantity of damage.
F Repair minor damage of the protection coating on the inlet cone assembly ** ON A/C NOT FOR ALL
   (1) If only the polyurethane coat is damaged, do steps C(1), D and F.
   (2) If the polyurethane coat and epoxy varnish coat are damaged, do steps C(2), D, E and F.
Subtask 72-38-11-350-055-A ** ON A/C NOT FOR ALL
C. Prepare the inlet cone assembly for surface protection.
F Repair minor damage of the protection coating on the inlet cone assembly ** ON A/C NOT FOR ALL
   (1) Prepare the inlet cone assembly for surface protection, if the polyurethane coat is damaged.
CAUTION: BE CAREFUL NOT TO CUT OR DAMAGE THE EPOXY VARNISH COAT AND GLASS FIBER BELOW.
     (a) Carefully cut away any loose polyurethane coat using a SCALPEL.
   (2) Prepare the inlet cone assembly for surface protection, if the polyurethane coat and epoxy varnish are damaged.
CAUTION: BE CAREFUL NOT TO CUT OR DAMAGE THE GLASS FIBER BELOW.
     (a) Carefully cut away any loose polyurethane and/or epoxy varnish coat using a SCALPEL.
     (b) Rub down the damaged area for repair, feather the edges and make smooth using Waterproof silicon carbide abrasive paper (Material No.V05-021) or waterproof silicon carbide (Material No.V05-020) (Ref. AMM TASK 70-30-00-918-010).
Subtask 72-38-11-110-053-A ** ON A/C NOT FOR ALL
D. Clean the repaired area with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-060Acetone, Analar grade or V01-124Isopropyl Alcohol, Technical grade (Ref. AMM TASK 70-30-00-918-010).
Subtask 72-38-11-360-051-A ** ON A/C NOT FOR ALL
E. Apply the epoxy varnish coat.
F Repair minor damage of the protection coating on the inlet cone assembly ** ON A/C NOT FOR ALL
NOTE: This procedure is only used when the epoxy varnish coat is damaged.
   (1) Mask the areas not to be coated using adhesive tape paper heat resistant masking tape (Material No.V02-019) (Ref. AMM TASK 70-30-00-918-010).
   (2) Mix equal volumes of epoxy primer base (Material No.V07-080) and epoxy primer catalyst (Material No.V07-081) . If required, thinners (Material No.V07-082) may be added up to 10 percent of volume (Ref. AMM TASK 70-30-00-918-010).
NOTE: The mixture must be allowed to stand for 30 minutes before use.
   (3) Apply one coat of primer using a BRUSH - BRISTLED.
   (4) Remove any unwanted primer from the repair area using a clean solvent moist lint free cloth.
   (5) Apply one more coat of primer to a minimum thickness of 0.001 in. (0.025 mm). Air dry for four hours at a minimum temperature of 60 deg F (16 deg C).
   (6) Make up the epoxy finish using bright aluminium (Material No.V07-079) and two-pack epoxy finish white and catalyst (Material No.V07-007) in equal volume, or epoxy matt finish-black (Material No.V07-117) and catalyst for matt finish (Material No.V07-120) in equal volume, or epoxy gloss finish-white (Material No.V07-119) and catalyst for gloss finish (Material No.V07-118) in equal volume (Ref. AMM TASK 70-30-00-918-010).
NOTE: The mixture must be allowed to stand for 30 minutes before use.
   (7) Apply one coat of the epoxy varnish using a BRUSH - BRISTLED.
   (8) Apply one more coat of the epoxy varnish to a minimum thickness of 0.001 in. (0.025 mm). Air dry for four hours at a minimum temperature of 61 deg F (16 deg C). The coat is hard-dry after six hours.
   (9) Apply one more coat of the epoxy varnish if necessary.
   (10) Remove the masking tape.
Subtask 72-38-11-360-052-A ** ON A/C NOT FOR ALL
F. Apply the polyurethane top coat.
F Repair minor damage of the protection coating on the inlet cone assembly ** ON A/C NOT FOR ALL
CAUTION: MAKE SURE THAT THE REPAIR SURFACES ARE FULLY CLEAN. DO NOT TOUCH BY HAND AFTER CLEAN. WEAR THE CLEAN COTTON OR POLYTHENE GLOVES.
   (1) Make sure the surface for repair is clean.
     (a) Use a clean BRUSH - BRISTLED, SOFT to quickly apply a constant thickness of surface inspection fluid (Material No.V06-021) over the repaired surface. If the surface of the liquid breaks in less than 30 seconds, do step A. again.
   (2) Remove the surface inspection fluid (Material No.V06-021) using V01-060Acetone, Analar grade (Ref. AMM TASK 70-30-00-918-010) and let the surface dry.
   (3) Mask the area not to be coated using adhesive tape paper heat resistant masking tape (Material No.V02-019) (Ref. AMM TASK 70-30-00-918-010).
   (4) Mix resin (Material No.V08-069) , cure agent (Material No.V08-077) and V01-076Methyl Ethyl Ketone, Technical grade (Ref. AMM TASK 70-30-00-918-010). Resin parts by weight 100, hardener parts by weight 13.5 and methylethylketone parts by weight 40 to 70.
   (5) Apply a constant coat of the polyurethane using a BRUSH - BRISTLED or GUN - SPRAY. Air dry for 30 minutes.
NOTE: One coat gives a thickness of approximately 0.003 in. (0.076 mm).
   (6) Do step F. (5) at least 5 times. Make repaired area smoothly continuous with the adjacent area.
   (7) Remove any unwanted polyurethane from the repair area using a clean Textile-Lint free Cotton - (Material No.14SBA1) moist with V01-060Acetone, Analar grade or V01-124Isopropyl Alcohol, Technical grade (Ref. AMM TASK 70-30-00-918-010).
   (8) Cure the coat for four hours at 248 to 266 deg F (120 to 130 deg C) in an applicable OVEN - CURING, PORTABLE or 24 hours at room temperature as a minimum temperature of 61 deg F (16 deg C).
   (9) Remove the masking tape.
Subtask 72-38-11-210-054-A ** ON A/C NOT FOR ALL
G. Make sure the aerodynamic surface is smooth. It is accepted if the color is not equal.
F Repair minor damage of the protection coating on the inlet cone assembly ** ON A/C NOT FOR ALL
5. Close-up
Subtask 72-38-11-942-054-A ** ON A/C NOT FOR ALL
A. Remove the ground support equipment
   (1) Remove the workmat from the air intake cowl.
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 02:46:10 UTC
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