DOC AIRBUS | AMM A320FRepair by Replacement of the Anti-ice Impact Panels - VRS1844 [IAE]
TASK 72-32-85-300-021-A
Repair by Replacement of the Anti-ice Impact Panels - VRS1844
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 72-32-85-941-087-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-340-196-A ** ON A/C NOT FOR ALL
Subtask 72-32-85-410-079-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:01:07 UTC
Repair by Replacement of the Anti-ice Impact Panels - VRS1844
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
YOU MUST KEEP ALL SURFACES CLEAN DURING THIS REPAIR. DIRT OR GREASE ON BONDING SURFACES WILL CAUSE UNSATISFACTORY BONDS. CLEAN COTTON OR POLYTHENE GLOVES MUST BE WORN BY ALL PERSONS TOUCHING THE PARTS TO BE BONDED. THE TOUCHING OF PARTS MUST BE KEPT TO A MINIMUM AND COMPONENTS MUST NOT BE TOUCHED ON THEIR PREPARED SURFACES.
CAUTION:
TO GET GOOD BONDING, YOU MUST TAKE CARE TO CORRECTLY PREPARE THE ABRADED SURFACES AND TO USE THE ADHESIVE CORRECTLY.
NOTE: This repair procedure is estimated to take less than 15 hours in the hangar when done by skilled mechanics familiarized with the procedure.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | BLASTING EQUIPMENT - SAND, PORTABLE |
| No specific | 3 | BRUSH - BRISTLED, SOFT |
| No specific | 1 | DETECTOR - HELITEST WING KIT DET-W-40052 |
| No specific | AR | FILM - POLYETHYLENE |
| No specific | 1 | GUN - SEALANT, AIR POWERED |
| No specific | 1 | HAMMER - AIR |
| No specific | 2 | KNIFE - PUTTY |
| No specific | 1 | LOCALLY MANUFACTURED - SHIM PLATE |
| No specific | 1 | MACHINE - AIR GRINDER |
| No specific | 1 | MACHINE - FLUX CHIPPER |
| No specific | AR | MAT - WORK |
| No specific | 1 | PUMP - VACUUM |
| No specific | 1 | THICKNESS MEASURING EQUIPMENT - ULTRASONIC |
| No specific | 2 | VACUUM CLEANER |
| No specific | 1 | VACUUM SANDBLASTER |
| No specific | 1 | VIBRO ENGRAVER |
| No specific | AR | WARNING NOTICE(S) |
| No specific | 1 | WATER - DEIONIZED |
| No specific | 1 | WATER - DISTILLED |
| IAE3J13053 | 1 | FIXTURE-BONDING |
| IAE3J13055 | 1 | FIXTURE-BONDING |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-031) | Acetone, Technical grade |
| (Material No.V01-060) | Acetone, Analar grade |
| (Material No.V01-124) | Isopropyl Alcohol, Technical grade |
| (Material No.V02-005) | adhesive tape |
| (Material No.V02-097) | lint free gloves |
| (Material No.V02-099) | lint free cloth |
| (Material No.V02-100) | white nylon gloves |
| (Material No.V02-166) | breather cloth |
| (Material No.V02-222) | bagging film |
| (Material No.V02-223) | release film |
| (Material No.V02-224) | silicone adhesive polyester tape |
| (Material No.V02-334) | porous release film |
| (Material No.V05-003) | abrasive medium |
| (Material No.V05-016) | garnet paper |
| (Material No.V05-020) | waterproof silicon carbide |
| (Material No.V05-185) | polishing discs |
| (Material No.V05-186) | conditioning disc |
| (Material No.V08-154A) | sealant |
| (Material No.V08-155) | adhesive promoter |
| (Material No.V12-045) | vacuum bag sealant tape |
| (Material No.V12-046) | vacuum bag sealant tape |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-31-00-000-010-B | Removal of the LP Compressor (Fan) Module |
| TASK 72-31-00-400-010-B | Installation of the LP Compressor (Fan) Module |
| TASK 72-31-11-000-010-B | Removal of the LP Compressor Fan Blades |
| TASK 72-31-11-400-010-C | Installation of the LP Compressor Fan Blades |
| TASK 72-32-85-350-015-A | Repair of the Fan Case - VRS1824 - PRE SBE 72-0160 |
Repair of the Anti-ice Impact PanelsSubtask 72-32-85-941-087-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).
(4) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.
(5) Put the MAT - WORK into position in the fan case or air intake cowl.
Subtask 72-32-85-010-113-A ** ON A/C NOT FOR ALL (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).
(4) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.
(5) Put the MAT - WORK into position in the fan case or air intake cowl.
NOTE: Make sure that the red warning pennants of the workmat can be seen externally.
NOTE: Make sure that the workmat has sufficient dimensions to give full protection to the lower half of the fan case or air intake cowl.
B. Get Access
(1) Remove a sufficient number of LP compressor blades and fillers to get access to the repair area (Ref. AMM TASK 72-31-00-000-010) or (Ref. AMM TASK 72-31-11-000-010).
4. Procedure(1) Remove a sufficient number of LP compressor blades and fillers to get access to the repair area (Ref. AMM TASK 72-31-00-000-010) or (Ref. AMM TASK 72-31-11-000-010).
Subtask 72-32-85-340-196-A ** ON A/C NOT FOR ALL
A. Prepare Areas of Damaged Area
(1) Use adhesive tape (Material No.V02-005) and FILM - POLYETHYLENE or equivalent to protect the engine opening.
Subtask 72-32-85-340-106-A ** ON A/C NOT FOR ALL (1) Use adhesive tape (Material No.V02-005) and FILM - POLYETHYLENE or equivalent to protect the engine opening.
NOTE: Make sure the masking sheet has sufficient dimensions to give full protection to the inlet of the LPC guide vane assembly, outlet of the stage 2.5 bleed duct and inside of the LP stub shaft.
B. Prepare the Repair Area
(2) Remove all the remaining unwanted material and adhesive from the fan case with an MACHINE - AIR GRINDER and polishing discs (Material No.V05-185) or conditioning disc (Material No.V05-186) .
(3) Cut the replacement panel (2) to the correct length to give the necessary gap.
(5) Make sure that the replacement panels can be placed in position.
(6) Cleaning of the repair area
V01-031 Acetone, Technical grade V01-060 Acetone, Analar grade V01-124 Isopropyl Alcohol, Technical grade
(c) Make the repair area rough with dry abrasive blast with abrasive medium (Material No.V05-003) and VACUUM SANDBLASTER or BLASTING EQUIPMENT - SAND, PORTABLE.
(e) Immediately dry the area with an oil free dry air blast.
Subtask 72-32-85-210-141-A ** ON A/C NOT FOR ALL CAUTION:
DO NOT USE POWERED TOOLS WITH STEEL CHISEL OR SIMILAR BITS.
CAUTION:
THE FAN CASE IS MADE FROM TITANIUM ALLOY AND IS THIN IN SOME AREAS. IF YOU HIT THE FAN CASE WITH A CHISEL OR SCRAPER YOU CAN MAKE IT UNSERVICEABLE.
CAUTION:
DO NOT OPERATE WITHOUT SAFETY GOGGLES AND OTHER GUARD EQUIPMENT. FLYING PARTICLES CAN CAUSE INJURY.
CAUTION:
YOU MUST USE THE CHISEL, SHARP BLADE OR SCRAPER IN A CIRCUMFERENTIAL DIRECTION TO PREVENT THE EDGES OF THE BLADE SCORING THE FAN CASE.
CAUTION:
YOU MUST ALWAYS TRY TO POINT THE CHISEL OR SHARP BLADE PARALLEL WITH THE SURFACE OF THE FAN CASE.
CAUTION:
DO NOT TOUCH THE FAN BLADES WITH TOOLS WHEN YOU REMOVE THE DAMAGED PANELS.
CAUTION:
PREVENT TOO MUCH SURFACE ABRASION OF THE FAN CASE MATERIAL SURFACE FINISH USING ABRASIVE BLASTING IS NECESSARY. THIS WILL GIVE THE BEST BONDING RESULT.
CAUTION:
HAND DRESSING TOOLS ARE NOT TO BE USED AT THE SAME LOCATION, DO NOT DWELL IN ONE AREA OR ANY AREA.
(1) Remove most of the damaged panels. Use HAMMER - AIR or MACHINE - FLUX CHIPPER with aluminum chisel (2) Remove all the remaining unwanted material and adhesive from the fan case with an MACHINE - AIR GRINDER and polishing discs (Material No.V05-185) or conditioning disc (Material No.V05-186) .
(3) Cut the replacement panel (2) to the correct length to give the necessary gap.
NOTE: The replacement panel (2) is made longer than necessary to make easier the necessary adjustment.
(4) Remove all remaining unwanted material with the VACUUM CLEANER. (5) Make sure that the replacement panels can be placed in position.
(6) Cleaning of the repair area
WARNING:
A PRESSURIZED AIR STREAM CAN CAUSE INJURY. WEAR SAFETY GOGGLES AND PROTECTIVE CLOTHING.
CAUTION:
USE THE VACUUM SANDBLASTER FOR THE BEST BONDING SURFACE OF THE TITANIUM PARTS.
CAUTION:
YOU MUST USE OIL-FREE DRY AIR ONLY.
(a) Remove all grease from the repair area with NOTE: Examine the bonding area of the fan case assembly for the surface finish and for any nicks, dents, scratches and gouges. The wall thickness can be measured with the THICKNESS MEASURING EQUIPMENT - ULTRASONIC or equivalent, if necessary. If necessary do blend repair (Ref. AMM TASK 72-32-85-350-015).
(b) Fully mask off all areas except the bonding area with silicone adhesive polyester tape (Material No.V02-224) and/or other applicable procedure. (c) Make the repair area rough with dry abrasive blast with abrasive medium (Material No.V05-003) and VACUUM SANDBLASTER or BLASTING EQUIPMENT - SAND, PORTABLE.
NOTE: Remove the glossy surface from the repair area of the fan case assembly. Make sure that there is a constant matt surface on the whole repair area.
NOTE: IAE recommends that the working pressure of the vacuum sandblaster or portable sandblaster is approximately 70 psi to 100 psi (480 Kpa to 690 KPa).
NOTE: IAE recommends that the minimum time of operation for a blasting of repair area is 40 minutes for each panel area.
(d) Remove all remaining unwanted material with a VACUUM CLEANER. (e) Immediately dry the area with an oil free dry air blast.
NOTE: Continue with the bonding process in less than 8 hours after the cleaning procedure.
C. Do a Water-Break Inspection of the Repair Area
V01-031 Acetone, Technical grade V01-060 Acetone, Analar grade V01-124 Isopropyl Alcohol, Technical grade
(2) Use a clean BRUSH - BRISTLED, SOFT to quickly apply a layer of WATER - DISTILLED or WATER - DEIONIZED to the bonding surface.
(3) Water-break inspection.
(b) If a break in continuity occurs in less than 30 seconds, clean the surface again until a continuous layer is seen.
(c) Remove the water withV01-031 Acetone, Technical grade V01-060 Acetone, Analar grade
Subtask 72-32-85-340-227-A ** ON A/C NOT FOR ALL CAUTION:
DO NOT TOUCH THE PREPARED SURFACE, BETWEEN THE PROCEDURE TO CLEAN AND THE BONDING PROCEDURE.
(1) Clean the bonding surface with (2) Use a clean BRUSH - BRISTLED, SOFT to quickly apply a layer of WATER - DISTILLED or WATER - DEIONIZED to the bonding surface.
(3) Water-break inspection.
CAUTION:
DO NOT USE TAP WATER AND MINERAL WATER. YOU MUST USE DISTILLED OR DEIONIZED WATER DURING THE WATER-BREAK INSPECTION.
(a) Immediately, look to see if the layer has a break in continuity. (b) If a break in continuity occurs in less than 30 seconds, clean the surface again until a continuous layer is seen.
(c) Remove the water with
NOTE: Continue with the bonding process in less than 8 hours after the cleaning procedure.
D. Apply Adhesion Promoter
(a) Remove all grease from the repair area withV01-031 Acetone, Technical grade V01-060 Acetone, Analar grade V01-124 Isopropyl Alcohol, Technical grade
Subtask 72-32-85-340-107-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
(1) Surface preparation. (a) Remove all grease from the repair area with
NOTE: Always pour cleaning fluid on the cloth to avoid contaminating the cleaning fluid supply. Wash one small area at a time.
NOTE: It is important that the surface is dried with a second clean cloth prior to the cleaning fluid evaporating to prevent the redeposition of contaminants on the fan case surface.
(2) Apply a thin coat of adhesive promoter (Material No.V08-155) to the cleaned surface by BRUSH - BRISTLED, SOFT or lint free cloth (Material No.V02-099) and allow to dry for approximately 30 minutes at room temperature. NOTE: If the primed surface contaminated or the bonding is not accomplished within 8 hours after application of the adhesion promoter, repeat priming procedure
E. Bond the New Panels
(2) Remove all remaining unwanted material with a VACUUM CLEANER.
(3) Use the sealant (Material No.V08-154A) . Weigh out 100 parts of base compound (white compound) and 18.5 parts of curing compound (black compound). If using SEMKIT from sealant, prepare either by hand, or using a mixing machine as described in the manufacturer's leaflet.
Subtask 72-32-85-340-108-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT USE PR2001B-1/2 SEALANT. THIS MATERIAL IS 30 MINUTES APPLICATION LIFE TYPE SEALANT. THIS BONDING STEP IS ESTIMATED TO TAKE MORE THAN 1 HOUR WHEN DONE BY SKILLED MECHANICS FAMILIARIZED WITH THIS APPLICATION PROCEDURE.
(1) Make a rough bonding surface on the replacement panels with garnet paper (Material No.V05-016) . (2) Remove all remaining unwanted material with a VACUUM CLEANER.
(3) Use the sealant (Material No.V08-154A) . Weigh out 100 parts of base compound (white compound) and 18.5 parts of curing compound (black compound). If using SEMKIT from sealant, prepare either by hand, or using a mixing machine as described in the manufacturer's leaflet.
NOTE: This sealant is supplied in several forms. The preferred form is SEMKIT, alternative is the tin form.
NOTE: Wear lint free gloves (Material No.V02-097) or white nylon gloves (Material No.V02-100) when you touch the parts.
(4) Mix the two parts together until the paste is a constant color. No streaks are permitted. NOTE: The life of the mixed sealant is approximately 2 hours at 77 deg.F (25 deg.C).
NOTE: Application life is dependent upon ambient environmental conditions. Increases in temperature and low humidity will shorten application time. Conversely, lower temperatures and high humidity will increase application life. For the examples, the life of the mixed sealant is approximately 2 hours, at 77 deg.F (25 deg.C) and 50 percent RH.
(5) Use a KNIFE - PUTTY or GUN - SEALANT, AIR POWERED to apply the sealant to mating surfaces of both components to a thickness of between 0.015 and 0.024 in. (0.38 and 0.61 mm). Be careful not to touch prepared surface. NOTE: In order to ensure that anti ice impact area of the panel has contact with the surface of the sealant it is necessary to apply the sealant to the maximum specified thickness 0,61 mm. The sealant layer thickness must not fall below the specified minimum 0,38 mm.
NOTE: For the best results apply a thin layer of the sealant for anti ice impact area but satisfactory results can be achieved with layers as much as 0.02 in. (0.5 mm)
NOTE: Wear lint free gloves (Material No.V02-097) or white nylon gloves (Material No.V02-100) when you touch the parts.
(6) Put the replacement linings in to position and hold them with silicone adhesive polyester tape (Material No.V02-224) . NOTE: Move the new panels into position with the shim plates (locally made) between the linings, if necessary.
F. Hold the New Panels in Position
(1) Method 1: hold the new panels in position with the vacuum bag:
(a) Make up the annular vacuum bag.
2 Over them apply a bagging film (Material No.V02-222) between the area of the hook and the metal surface behind the acoustic linings.
3 Install the vacuum valve to the bagging film.
4 Seal the edges of the bagging film to the hook and the metal surface behind the acoustic linings with vacuum bag sealant tape (Material No.V12-045) or vacuum bag sealant tape (Material No.V12-046) .
(b) Remove the air from the vacuum bag with the PUMP - VACUUM. Do an audible check for leaks or with an DETECTOR - HELITEST WING KIT DET-W-40052.
(c) Apply and keep a vacuum of 10.2 psi (70 kpa). This must be kept during the cure time.
(d) Cure the sealant.
1 Allow the sealant (Material No.V08-154A) to cure for 9 hours at ambient temperature 77 deg.F to 95 deg.F (25 deg.C to 35 deg.C).
(e) Remove the vacuum bag and the sealant tape.
(2) Method 2: hold the new panels in position with the bonding fixtures:
(b) Cure the sealant.
1 Allow the sealant (Material No.V08-154A) to cure for 9 hours at ambient temperature 77 deg.F to 95 deg.F (25 deg.C to 35 deg.C).
3 If the remaining sealant material after repair exceeds the limit, dress the sealant material with the waterproof silicon carbide (Material No.V05-020) , if necessary.
(c) Remove the IAE3J13053 FIXTURE-BONDING and IAE3J13055 FIXTURE-BONDING.
Subtask 72-32-85-340-179-A ** ON A/C NOT FOR ALL (1) Method 1: hold the new panels in position with the vacuum bag:
(a) Make up the annular vacuum bag.
NOTE: If you use the LOCALLY MANUFACTURED - SHIM PLATE in SUBSTASK 72-32-85-340-107 step D.(3).(d) or step D.(4).(d), remove the LOCALLY MANUFACTURED - SHIM PLATE from the gaps. Make sure that no LOCALLY MANUFACTURED - SHIM PLATE remain in the gaps.
1 Cover the replacement panels with a sheet of porous release film (Material No.V02-334) that is 3.00 in. (76.2 mm) longer than each end of the panels, 3 plies of breather cloth (Material No.V02-166) and one ply of release film (Material No.V02-223) . 2 Over them apply a bagging film (Material No.V02-222) between the area of the hook and the metal surface behind the acoustic linings.
3 Install the vacuum valve to the bagging film.
4 Seal the edges of the bagging film to the hook and the metal surface behind the acoustic linings with vacuum bag sealant tape (Material No.V12-045) or vacuum bag sealant tape (Material No.V12-046) .
(b) Remove the air from the vacuum bag with the PUMP - VACUUM. Do an audible check for leaks or with an DETECTOR - HELITEST WING KIT DET-W-40052.
(c) Apply and keep a vacuum of 10.2 psi (70 kpa). This must be kept during the cure time.
(d) Cure the sealant.
1 Allow the sealant (Material No.V08-154A) to cure for 9 hours at ambient temperature 77 deg.F to 95 deg.F (25 deg.C to 35 deg.C).
NOTE: Make sure the full cure time is used and correct temperature maintained.
NOTE: Make sure that you monitor the ambient temperature of the adhesive and work area with suitable instruments, across all of the panels.
NOTE: If the bonding process passes 48 hours though is a condition of any humidity if the curing temperature is secured 50 deg.F (10 deg.C) or more, necessary strength is secured.
2 Cure may be hastened by applying heat sealant (Material No.V08-154A) can obtain a serviceable cure hardness after four hours at 113 deg.F (45 deg.C). NOTE: Make sure the full cure time is used and correct temperature maintained.
NOTE: Make sure that you monitor the ambient temperature of the adhesive and work area with suitable instruments, across all of the panels.
NOTE: If the bonding process passes 48 hours though is a condition of any humidity if the curing temperature is secured 50 deg.F (10 deg.C) or more, necessary strength is secured.
3 If the remaining sealant material after repair exceeds the limit, dress the sealant material with the waterproof silicon carbide (Material No.V05-020) , if necessary. (e) Remove the vacuum bag and the sealant tape.
(2) Method 2: hold the new panels in position with the bonding fixtures:
NOTE: If you use the LOCALLY MANUFACTURED - SHIM PLATE in SUBTASK 72-32-85-340-107 step D.(3).(d) or step D.(4).(d), remove the LOCALLY MANUFACTURED - SHIM PLATE from the gaps. Make sure that no LOCALLY MANUFACTURED - SHIM PLATE remain in the gaps.
(a) Install the IAE3J13053 FIXTURE-BONDING and IAE3J13055 FIXTURE-BONDING, to hold the new panels in position. (b) Cure the sealant.
1 Allow the sealant (Material No.V08-154A) to cure for 9 hours at ambient temperature 77 deg.F to 95 deg.F (25 deg.C to 35 deg.C).
NOTE: Make sure the full cure time is used and correct temperature maintained.
NOTE: Make sure that you monitor the ambient temperature of the adhesive and work area with suitable instruments, across all of the panels.
NOTE: If the bonding process passes 48 hours though is a condition of any humidity if the curing temperature is secured 50 deg.F (10 deg.C) or more, necessary strength is secured.
2 Cure may be hastened by applying heat sealant (Material No.V08-154A) can obtain a serviceable cure hardness after four hours at 113 deg.F (45 deg.C). 3 If the remaining sealant material after repair exceeds the limit, dress the sealant material with the waterproof silicon carbide (Material No.V05-020) , if necessary.
(c) Remove the IAE3J13053 FIXTURE-BONDING and IAE3J13055 FIXTURE-BONDING.
G. Prepare the Filler Material
Subtask 72-32-85-340-109-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
DO NOT USE PR2001B-1/2 SEALANT. THIS MATERIAL IS 30 MINUTES APPLICATION LIFE TYPE SEALANT. THIS BONDING STEP IS ESTIMATED TO TAKE MORE THAN 1 HOUR WHEN DONE BY SKILLED MECHANICS FAMILIARIZED WITH THIS APPLICATION PROCEDURE.
(1) Use the sealant (Material No.V08-154A) . Weigh out 100 parts of base compound (white compound) and 18.5 parts of curing compound (black compound). If using SEMKIT from sealant, prepare either by hand, or using a mixing machine as described in the manufacturer's leaflet. NOTE: This sealant is supplied in several forms. The preferred form is SEMKIT, alternative is the tin form.
NOTE: Wear lint free gloves (Material No.V02-097) or white nylon gloves (Material No.V02-100) when you touch the parts.
(2) Mix the two parts together until the paste is a constant color. No streaks are permitted. NOTE: The life of the mixed sealant is approximately 2 hours at 77 deg.F (25 deg.C).
NOTE: Application life is dependent upon ambient environmental conditions. Increases in temperature and low humidity will shorten application time. Conversely, lower temperatures and high humidity will increase application life. For the examples, the life of the mixed sealant is approximately 2 hours, at 77 deg.F (25 deg.C) and 50 percent RH.
H. Apply the Filler Material
(1) Use the KNIFE - PUTTY to put the sealant into the slots between the anti ice panels.
(2) Cure the sealant.
(b) Cure may be hastened by applying heat. sealant (Material No.V08-154A) can obtain a serviceable cure hardness after four hours at 113 deg.F (45 deg.C).
Subtask 72-32-85-350-105-A ** ON A/C NOT FOR ALL (1) Use the KNIFE - PUTTY to put the sealant into the slots between the anti ice panels.
(2) Cure the sealant.
CAUTION:
THE MAXIMUM TEMPERATURE WHICH CAN BE USED TO CURE THE SEALANT IS 140 DEG.F (60 DEG.C).
(a) Allow the sealant (Material No.V08-154A) to cure for 9 hours at ambient temperature 77 deg.F to 95 deg.F (25 deg.C to 35 deg.C). (b) Cure may be hastened by applying heat. sealant (Material No.V08-154A) can obtain a serviceable cure hardness after four hours at 113 deg.F (45 deg.C).
NOTE: Make sure that you monitor the ambient temperature of the sealant and work area with suitable instruments, across all of the lining.
NOTE: Make sure that you monitor the ambient temperature of the adhesive and work area with suitable instruments, across all of the panels.
NOTE: If the bonding process passes 48 hours though is a condition of any humidity if the curing temperature is secured 50 deg.F (10 deg.C) or more, necessary strength is secured.
(3) If the remaining sealant material after repair exceeds the limit, dress the sealant material with the waterproof silicon carbide (Material No.V05-020) or equivalent, if necessary. I. Identify the Repair
(1) A log book entry is necessary when you have completed this repair. Write "VRS1844" in the engine log book.
(2) At the next shop visit make a mark "VRS1844" adjacent to the part number. Use VIBRO ENGRAVER equipment.
Subtask 72-32-85-210-091-A ** ON A/C NOT FOR ALL (1) A log book entry is necessary when you have completed this repair. Write "VRS1844" in the engine log book.
(2) At the next shop visit make a mark "VRS1844" adjacent to the part number. Use VIBRO ENGRAVER equipment.
J. Examine the Repair Area
(1) Make sure that the surface of the filler is flat and smooth.
(2) Accept a step if it is less than 0.020 in. (0.5 mm).
(3) If necessary, apply more filler.
(4) Press or tap the panels, to do a check for lack of bond.
(5) If lack of bond is apparent, do this TASK again.
5. Close-up(1) Make sure that the surface of the filler is flat and smooth.
(2) Accept a step if it is less than 0.020 in. (0.5 mm).
(3) If necessary, apply more filler.
(4) Press or tap the panels, to do a check for lack of bond.
(5) If lack of bond is apparent, do this TASK again.
Subtask 72-32-85-410-079-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Install the LP compressor blades and fillers (Ref. AMM TASK 72-31-00-400-010) or (Ref. AMM TASK 72-31-11-400-010).
Subtask 72-32-85-942-077-A ** ON A/C NOT FOR ALL (1) Install the LP compressor blades and fillers (Ref. AMM TASK 72-31-00-400-010) or (Ref. AMM TASK 72-31-11-400-010).
B. Remove the Ground Support Equipment
(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 WARNING NOTICE(S).
(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 WARNING NOTICE(S).