Visual Inspection of the Outlet Guide Vanes (OGVs), Inter OGV Seals and OGV Plugs [CFML]

TASK 72-24-20-210-801-A
Visual Inspection of the Outlet Guide Vanes (OGVs), Inter OGV Seals and OGV Plugs

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

ZONE: 410
ZONE: 420

1. Reason for the Job
This procedure gives the criteria for the visual inspection of the OGV, inter OGV seals and OGV plugs.

NOTE: The inspection criteria below are applicable after the removal of the high metal.

NOTE: You can use equivalent alternatives for standard tools, equipment and consumable materials.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 72-24-20-300-801-A	Outlet Guide Vanes Blending of the Leading Edge and/or Paint Spot Touch-Up of the Airfoil (Outlet Guide Vane (OGV) Remove)
TASK 72-24-20-400-801-A	Installation of the Outlet Guide Vane (OGV)
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Outlet Guide Vanes (OGVs)
Inter OGV Seals and OGV Plugs

3. Job Set-up
Subtask 72-24-20-941-052-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 72-24-20-010-054-A

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 72-24-20-040-052-A

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 72-24-20-010-055-A

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

4. Procedure
Subtask 72-24-20-420-051-A

A. Visual Inspection of the 41 OGVs

Outlet Guide Vanes (OGVs)

(1) Do a visual inspection of the 41 OGVs (1). Refer to the table below for the inspection area.

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Visual inspection of the Leading Edge (LE), the LE fillet and the Trailing Edge (TE), except the bottom TE area and the top TE fillet:
A.Dents, nicks, scratches	Any number up to 0.0098 in. (0.25 mm) in depth.	See repair (Ref. AMM TASK 72-24-20-300-801).
B.Local distortion	Any number up to: 0.0197 in. (0.50 mm) in deformation 0.197 in. (5.00 mm) in length.	See repair (Ref. AMM TASK 72-24-20-300-801).
C.Tears, cracks	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
D.Erosion and/or missing surface protection	All missing paint and anodized coating is permitted if there is no corrosion and if the base metal is not affected.	See repair (Ref. AMM TASK 72-24-20-300-801).
E.Corrosion, pitting.	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
2.Visual inspection of the suction side flowpath surface, except the LE, the TE and the fillets:
A.Dents, nicks, scratches	Any number up to 0.0098 in. (0.25 mm) in depth.	See repair (Ref. AMM TASK 72-24-20-300-801).
B.Erosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
C.Corrosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
D.Cracks.	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
3.Visual inspection of the pressure side flowpath surface, except the LE, the TE and the fillets:
A.Dents, nicks, scratches	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
B.Erosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
C.Corrosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
D.Cracks	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
POST SB 72-0018 or POST SB 72-0070 or the bonded OGV POST SB 72-0019
E.Porosities in the glue around the bonded cover, see sheet 2 of the Outlet Guide Vanes (OGVs)	Any amount.
END of POST SB 72-0018 or END of POST SB 72-0070 or END of POST SB 72-0019 (for the bonded OGV)
4.Visual inspection of all areas except the LE (including the LE fillets) and the TE (including the TE fillets):
A.Erosion and/or missing surface protection.	Missing paint and anodized coating: 25 percent of the airfoil surface if there is no corrosion and if the base metal is not affected.	See repair (Ref. AMM TASK 72-24-20-300-801).
5.Visual inspection of the inner platform fillet except the LE, the TE and the outer mounting flange fillet:
A.Dents, nicks, scratches	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
B.Erosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
C.Corrosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
D.Cracks.	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
6.Visual inspection of the OGV bottom trailing edge area, including the TE fillet:
A.Tears, cracks	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
B.Corrosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
C.Erosion and/or missing surface protection	All missing paint and anodized coating is permitted if there is no corrosion and if the base metal is not affected.	See repair (Ref. AMM TASK 72-24-20-300-801).
D.Nicks, dents, scratches.	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
7.Visual inspection of the inner platform flowpath surface, except the fillets:
A.Dents, nicks, scratches	Any number up to 0.0098 in. (0.25 mm) in depth.	See repair (Ref. AMM TASK 72-24-20-300-801).
B.Erosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
C.Corrosion	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).
D.Cracks.	Not serviceable.	See repair (Ref. AMM TASK 72-24-20-300-801).

Subtask 72-24-20-210-050-A

B. Visual Inspection of the Inter OGV Seals

Inter OGV Seals and OGV Plugs

(1) Do a visual inspection of the inter OGV seals.

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
A.Cracks, crazings	Not serviceable.
B.Missing seal	0.393 IN. (10 MM) maximum length at the forward extremity or, 0.590 IN. (15 MM) maximum length at the afterward extremity or, 0.590 IN. (15 MM) maximum cumulative missing length per seal.	Criteria available only when seal and OGV are assembled.

Subtask 72-24-20-210-051-A

C. Visual Inspection of the OGV Plugs (POST SB LEAP 72-00-0235)

Inter OGV Seals and OGV Plugs

(1) Do a visual inspection of the OGV plugs.

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
A.Missing	Any number up to 14.	If the missing plugs are more than the allowable limit, seal the holes of the bolts (Ref. AMM TASK 72-24-20-400-801).

5. Close-up
Subtask 72-24-20-410-052-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL 462AR

Subtask 72-24-20-440-051-A

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 72-24-20-410-053-A

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:53:19 UTC