Repair of the Fan Case Anti-ice Impact Panels - VRS1826 [IAE]

TASK 72-32-85-350-017-A
Repair of the Fan Case Anti-ice Impact Panels - VRS1826

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: CHECK THE TOTAL REPAIR AREA PRIOR TO STARTING THE REPAIR. DO NOT CARRY OUT REPAIR BY FILLING THE ANTI ICE PANELS IF THE TOTAL REPAIRED AREA EXCEEDS 20 PERCENT OF THE TOTAL FAN CASE ANTI ICE PANEL AREA.

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

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 1M(3 FT)
No specific	AR	BRUSH - WIRE, ROTARY
No specific	AR	GUN - SEALANT
No specific	AR	KNIFE - PUTTY
No specific	AR	MACHINE - HAND GRINDING, PNEUMATIC
No specific	AR	MAT - WORK
No specific	AR	SCRAPER
No specific	AR	VACUUM CLEANER
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-076)	Methyl Ethyl Ketone, Technical grade
(Material No.V02-005)	adhesive tape
(Material No.V02-160)	teflon tape
(Material No.V02-223)	release film
(Material No.V05-016)	garnet paper
(Material No.V08-006)	filler, two pack
(Material No.V08-024)	sealant
(Material No.V08-125)	sealant
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

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 72-32-85-300-021-A	Repair by Replacement of the Anti-ice Impact Panels - VRS1844
TASK 72-32-85-300-042-A	Repair of the Fan Case - VRS1806 - Post SBE 72-0160
TASK 72-32-85-350-015-A	Repair of the Fan Case - VRS1824 - PRE SBE 72-0160
Filler Repair of the Anti-ice Impact Panels
Curing Chart of Filling Material (V08-006)

3. Job Set-up
Subtask 72-32-85-941-085-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 72-32-85-010-111-A ** ON A/C NOT FOR ALL

B. 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 72-32-85-941-086-A ** ON A/C NOT FOR ALL

C. Put the Ground Support Equipment into Position
(1) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.
(2) 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.

4. Procedure
Subtask 72-32-85-350-083-A ** ON A/C NOT FOR ALL

A. Prepare Areas of Damage
(1) Use adhesive tape (Material No.V02-005) and polyethylene sheet or equivalent to protect the engine opening.

NOTE: Make sure that 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.

Subtask 72-32-85-350-063-A ** ON A/C NOT FOR ALL

B. Remove all Damage from the Defective Area

Filler Repair of the Anti-ice Impact Panels ** ON A/C NOT FOR ALL

CAUTION: TAKE CARE NOT TO CAUSE DAMAGE TO THE CASING MATERIAL OF THE FAN CASE.

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: 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: STOP MACHINING AS SOON AS THE FILES, CUTTERS OR MACHINING BITS ARE THROUGH THE PANEL MATERIAL. USE A STOP-MACHINING OR SLEEVE OR OTHER PENETRATION LIMITING DEVICE TO PREVENT DAMAGE TO THE CASING MATERIAL.

CAUTION: DO NOT USE POWERED TOOLS WITH STEEL CHISEL OR SIMILAR BITS.

CAUTION: YOU MUST ALWAYS TRY TO POINT THE CHISEL OR SHARP BLADE PARALLEL WITH THE SURFACE OF THE FAN CASE.

CAUTION: DO NOT OPERATE WITHOUT SAFETY GOGGLES AND OTHER GUARD EQUIPMENT. FLYING PARTICLES CAN CAUSE INJURY.

(1) Use the MACHINE - HAND GRINDING, PNEUMATIC and BRUSH - WIRE, ROTARY to cut away all broken pieces of material or to make a hole for the injection of filler in to the damaged area. Be careful not to cause damage to the inner surface of the fan case assembly.

NOTE: Remove the minimum quantity of material necessary to remove all damage.

(2) Examine the Glass Reinforced Composite (GRC) skin. Press or tap it to do a check for indications of blisters or unsatisfactory bonds.
(a) A hollow sound is an indication of an unsatisfactory bond.
(b) Remove all unsatisfactory material. Be careful not to cause damage to the inner surface of the fan case assembly.
(3) Make the repair area rough with garnet paper (Material No.V05-016) .
(4) Remove all remaining debris with the VACUUM CLEANER.
(5) If the repair area on the anti-ice panel is more than 20 percent of total anti-ice panel, replace it (Ref. AMM TASK 72-32-85-300-021).

Subtask 72-32-85-110-059-A ** ON A/C NOT FOR ALL

C. Remove the Grease from the Repair Area
(1) Use the clean Textile-Lint free Cotton - (Material No.14SBA1) , made moist with V01-076Methyl Ethyl Ketone, Technical grade, to remove all grease from the repair area except the blue filler surface.
(2) Immediately dry out the repair area with a clean dry air blast.

Subtask 72-32-85-210-138-A ** ON A/C NOT FOR ALL

D. Examine the fan case inner surface of the repaired area, if necessary. Repair any nicks, dents, scratches and gouges (Ref. AMM TASK 72-32-85-300-042) or (Ref. AMM TASK 72-32-85-350-015).

Subtask 72-32-85-340-104-A ** ON A/C NOT FOR ALL

E. Prepare the Filler Material

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

(1) Use V08-006filler, two pack, option 1.
(a) Weigh out 100 parts of blue paste (part B) and 94 parts of white paste (part A).
(b) Mix the two parts together until the color of paste is constant blue. No streaks are permitted.

NOTE: The life of the mixed filler is approximately one hour at 72 deg.F (22 deg.C).

(2) Use sealant (Material No.V08-024) or sealant (Material No.V08-125) , option 2.
(a) Use sealant (Material No.V08-024) and sealant (Material No.V08-125) . This sealant is supplied in several forms. The preferred form is SEMKIT B1/2 (material No. V08-125), alternative is the tin form (material No. V08-024).
(b) If using sealant (Material No.V08-125) , prepare either by hand, or using a mixing machine as described in the manufacturer's leaflet.
(c) If using sealant (Material No.V08-024) , measure 75 parts of base compound and 10 parts of curing compound (accelerator) by weight.
(d) If using sealant (Material No.V08-024) knead the two parts together until the paste is a constant color with the KNIFE - PUTTY or equivalent. No streaks are permitted.

NOTE: When mixed the life of the sealant is approximately half an hour at 77 deg.F (25deg.C) in case of use of the V08-024 and V08-125 sealant.

NOTE: Sealant cure times with a relative humidity of 50 percent.

Subtask 72-32-85-340-105-A ** ON A/C NOT FOR ALL

F. Apply the Filler Material (material No. V08-006), option 1

Filler Repair of the Anti-ice Impact Panels ** ON A/C NOT FOR ALL

(1) Use the GUN - SEALANT to put the filler into the repair area to slightly more than necessary level.
(2) When the filler starts to feel hard, remove all unwanted filler.
(3) Use the KNIFE - PUTTY or a SCRAPER to get a burnished effect.
(4) If necessary, to get a smooth finish apply a small quantity of cold water to the putty knife.

NOTE: Do not use too much water because it will cause the filler to plasticize.

CAUTION: THE MAXIMUM TEMPERATURE WHICH CAN BE USED TO CURE THE FILLER IS 176 DEG.F (80 DEG.C)

(5) Cure the filler. The cure time and temperature is given in figure "Curing Chart of Filling Material(V08-006)".

Curing Chart of Filling Material (V08-006) ** ON A/C NOT FOR ALL

NOTE: The minimum cure time is one hour at 140 deg.F (60 deg.C).

NOTE: The filler will not cure at a temperature of less than 54 deg.F (12 deg.C).

(6) Blend the filler to the contour with garnet paper (Material No.V05-016) , if necessary.
(7) Remove all unwanted material with the VACUUM CLEANER.

Subtask 72-32-85-340-215-A ** ON A/C NOT FOR ALL

G. Apply the Sealant Material (when using V08-024 or V08-125 sealant), option 2

Filler Repair of the Anti-ice Impact Panels ** ON A/C NOT FOR ALL

(1) Use the GUN - SEALANT to put the V08-024 sealant or V08-125 sealant into the repair area to slightly more than necessary level.
(2) When the sealant starts to feel hard, remove any unnecessary sealant material.
(3) Place release film (Material No.V02-223) (non-porous) over the repair area and hold it in place with teflon tape (Material No.V02-160) .
(4) Use a Vacuum Equipment to apply pressure to keep contact between the repair area during the sealant cure cycle. Use teflon tape (Material No.V02-160) or equivalent, if necessar
(5) Let the sealant cure.

CAUTION: THE MAXIMUM TEMPERATURE WHICH CAN BE USED TO CURE THE SEALANT IS 120 DEG.F (49 DEG.C)

(a) Let the sealant cure the V08-024 sealant or V08-125 sealant by heating to 113 deg.F (45 deg.C) for approximately 1.5 hours.

NOTE: The minimum cure time is 1.5 hours. Sealant cure time is with relative humidity of 50 percent.

(6) Remove the release film, teflon tape and applied pressure source from the repair area and remove all the masking materials from the engine.

Subtask 72-32-85-210-089-A ** ON A/C NOT FOR ALL

H. Examine the Surface of the Repair Area

Filler Repair of the Anti-ice Impact Panels ** ON A/C NOT FOR ALL

(1) Make sure that the surface of the filler is smooth and flat.
(2) Accept a step if it is less than 0.020 in. (0.5 mm).
(3) If necessary, apply more filler.

5. Close-up
Subtask 72-32-85-410-078-A ** ON A/C NOT FOR ALL

A. 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 72-32-85-942-075-A ** ON A/C NOT FOR ALL

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 workmat from the fan case.
(3) Remove the access platform(s).

Subtask 72-32-85-942-076-A ** ON A/C NOT FOR ALL

C. Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:01:06 UTC