Repair of the Fan Frame Assembly - VRS1731 [IAE]

TASK 72-32-03-300-010-A
Repair of the Fan Frame Assembly - VRS1731

ZONE: 400
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	MAGNIFYING GLASS POWER 10X
No specific	AR	MAT - WORK
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V05-019)	Waterproof silicon carbide abrasive paper
(Material No.V05-020)	waterproof silicon carbide
(Material No.V05-021)	Waterproof silicon carbide abrasive paper

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
SPM 702305
Fan Frame Assembly

3. Job Set-up
Subtask 72-32-03-941-051-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 72-32-03-010-051-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(3) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 72-32-03-040-051-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 72-32-03-010-053-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.

Subtask 72-32-03-941-052-A ** ON A/C NOT FOR ALL

E. Put the support equipment in position
(1) 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. Make sure that the workmat has sufficient dimensions to give full protection to the lower half of the air intake cowl.

4. Procedure
Subtask 72-32-03-350-050-A ** ON A/C NOT FOR ALL

A. Dress and blend the damaged areas on the fan frame

Fan Frame Assembly ** ON A/C NOT FOR ALL

CAUTION: ON TITANIUM COMPONENTS, ONLY SILICON CARBIDE TYPE WHEELS, STONES AND ABRASIVE PAPERS ARE TO BE USED FOR THIS REPAIR. ALUMINIUM OXIDE TYPES MUST NOT BE USED.

CAUTION: THE TITANIUM COMPONENTS WILL OXIDIZE AND CRACK IF MECHANICAL CUTTERS ARE USED HEAVILY. THIS HAS OCCURED IF THE COMPONENT SHOWS DARK STRAW TO BLUE DISCOLORATION. IF AT ANY TIME THIS COLORATION OCCURS, THE RETAINING RING MUST BE REJECTED.

(1) Remove nicks and scraches from the fan frame assembly. Use the abrasive wheel and portable grinding equipment or fine file. Dress until all damage is removed.
(2) Blend the dressed areas and polish our scores on the fan frame assembly. Use Waterproof silicon carbide abrasive paper (Material No.V05-019) , waterproof silicon carbide (Material No.V05-020) and Waterproof silicon carbide abrasive paper (Material No.V05-021) . The surface finish must be the same as that of the adjacent undressed area.

Subtask 72-32-03-210-051-A ** ON A/C NOT FOR ALL

B. Visually examine the fan frame assembly for nicks and scratches with the MAGNIFYING GLASS POWER 10X

Fan Frame Assembly ** ON A/C NOT FOR ALL

Subtask 72-32-03-230-050-A ** ON A/C NOT FOR ALL

C. Do a penetrant crack test SPM 702305.
If it is cracked, reject it.

5. Close-up
Subtask 72-32-03-942-050-A ** ON A/C NOT FOR ALL

A. Remove the support equipment.
(1) Remove the workmat from the air intake cowl.

Subtask 72-32-03-410-051-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.

Subtask 72-32-03-440-050-A ** ON A/C NOT FOR ALL

C. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 72-32-03-410-053-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:45:18 UTC