Repair of the LP Compressor Annulus Fillers - VRS1815 [IAE]

TASK 72-31-11-300-010-B
Repair of the LP Compressor Annulus Fillers - VRS1815

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

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	ABRASIVE WHEEL
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	FILE - FINE
No specific	AR	GUN - HOT AIR
No specific	AR	MACHINE - GRINDING, PORTABLE
No specific	AR	MAT - WORK
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-124)	Isopropyl Alcohol, Technical grade
(Material No.V01-275)	chromate conversion coating
(Material No.V02-004)	paint brush
(Material No.V05-020)	waterproof silicon carbide
(Material No.V05-021)	Waterproof silicon carbide abrasive paper
(Material No.V07-007)	two-pack epoxy finish white and catalyst
(Material No.V07-080)	epoxy primer base
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-05-230-010-A	Local Application of Fluorescent Penetrant Inspection
TASK 70-30-00-918-010-A	Consumable Materials Index
TASK 72-31-11-200-010-B	Inspection of the Low Pressure (LP) Compressor Fan Blades
LP Compressor Annulus Fillers - Blend Limits
LP Compressor Annulus Fillers

3. Job Set-up
Subtask 72-31-11-941-059-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 ground support equipment in to position.
(a) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position to give access to the engine.
(b) Put the MAT - WORK in position in the air intake cowl.

NOTE: Make sure that the red warning pennants of the workmat can be seen external of the aircraft.

NOTE: Make sure that the workmat has sufficient dimensions to give full protection to the lower half of the air intake cowl.

4. Procedure
Subtask 72-31-11-350-059-A ** ON A/C NOT FOR ALL

A. Remove nicks, scores and dents from the annulus filler

LP Compressor Annulus Fillers - Blend Limits ** ON A/C NOT FOR ALL

(1) Use the MACHINE - GRINDING, PORTABLE and the ABRASIVE WHEEL or FILE - FINE to remove nicks, scores and/or dents from the annulus filler.
(2) Polish and make the repaired area smooth with Waterproof silicon carbide abrasive paper (Material No.V05-021) . The surface finish must be the same as the adjacent area.

Subtask 72-31-11-210-056-A ** ON A/C NOT FOR ALL

B. Visually examine the repaired area for nicks, scores and dents (Ref. AMM TASK 72-31-11-200-010).

Subtask 72-31-11-230-055-A ** ON A/C NOT FOR ALL

C. Do a penetrant crack test of the repaired area (Ref. AMM TASK 70-23-05-230-010).

Subtask 72-31-11-350-058-A ** ON A/C NOT FOR ALL

D. If cracks are found, rub the damaged area with waterproof silicon carbide (Material No.V05-020) or Waterproof silicon carbide abrasive paper (Material No.V05-021) , until the damaged area is made the same as the adjacent surface. Repeat step 4.C.

LP Compressor Annulus Fillers - Blend Limits ** ON A/C NOT FOR ALL

Subtask 72-31-11-110-054-A ** ON A/C NOT FOR ALL

E. Clean the Repaired Area
(1) Make a clean Textile-Lint free Cotton - (Material No.14SBA1) moist with V01-124Isopropyl Alcohol, Technical grade and clean the repaired area.

Subtask 72-31-11-370-054-A ** ON A/C NOT FOR ALL

F. Apply Coating
(1) Apply chromate conversion coating (Material No.V01-275) to the repaired area with a paint brush (Material No.V02-004) until the surface color turns from iridescent gold to a light brown.

LP Compressor Annulus Fillers ** ON A/C NOT FOR ALL

NOTE: This procedure usually requires between two to seven minutes to do.

Subtask 72-31-11-160-052-A ** ON A/C NOT FOR ALL

G. Clean the repaired area with cold water and a dry air blast.

Subtask 72-31-11-370-057-A ** ON A/C NOT FOR ALL

H. Apply Coating

LP Compressor Annulus Fillers ** ON A/C NOT FOR ALL

(1) Apply one coat of epoxy primer base (Material No.V07-080) to the repaired area with a paint brush (Material No.V02-004) .
(2) Dry the area for 4 to 16 hours at a minimum temperature of 61 deg F (16 deg C), or heat it for a minimum time of 30 minutes at a temperature of 248 to 266 deg F (120 to 130 deg C) with a hot air gun.

Subtask 72-31-11-370-060-A ** ON A/C NOT FOR ALL

I. Apply Coating

LP Compressor Annulus Fillers ** ON A/C NOT FOR ALL

(1) Apply one coat of two-pack epoxy finish white and catalyst (Material No.V07-007) to the repaired area with a paint brush (Material No.V02-004) .
(2) Dry the prepared area for a minimum time of one hour at a temperature of 61 deg F (16 deg C).
(3) Apply another coat of two-pack epoxy finish white and catalyst (Material No.V07-007) , if it is necessary.
(4) Dry the prepared area for a minimum time of 4 hours at a minimum temperature of 61 deg F (16 deg C), or heat it for 30 minutes at a temperature of 248 to 266 deg F (120 to 130 deg C) with a GUN - HOT AIR.

Subtask 72-31-11-210-072-A ** ON A/C NOT FOR ALL

J. Examine the layer of two-pack epoxy finish white and catalyst (Material No.V07-007) (Ref. AMM TASK 70-30-00-918-010) on the annulus filler.
The layer must not have any flakes.

5. Close-up
Subtask 72-31-11-942-057-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the workmat from the air intake cowl.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:00:59 UTC