Removal of the Outlet Guide Vane (OGV) [CFML]

TASK 72-24-20-000-801-A
Removal of the Outlet Guide Vane (OGV)

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: 400

1. Reason for the Job
Self explanatory
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
400	POWER PLANT, NACELLES AND PYLONS
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 72-24-01-000-801-A	Removal of Segment Shrouds 1 thru 5
TASK 72-24-03-000-801-A	Removal of the Strut 1
TASK 72-24-03-000-802-A	Removal of the Strut 5
TASK 72-24-03-000-803-A	Removal of the Strut 6
TASK 72-24-09-000-801-A	Removal of the Flowpath Panels 1 to 4
TASK 72-24-11-000-801-A	Removal of the Outer Outlet Guide Vane (OGV) Platform
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 79-21-30-000-802-A	Removal of the Engine Surface Air Cooling Oil Cooler (SACOC)
Outlet Guide Vane (OGV)

3. Job Set-up
Subtask 72-24-20-941-050-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, and
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 72-24-20-010-050-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 72-24-20-040-050-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 maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 72-24-20-010-051-A

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

4. Procedure
Subtask 72-24-20-020-050-A

A. Removal of the Outlet Guide Vane (OGV)
(1) Identify the OGV (1), the fan frame module segment shrouds (3) and the strut panels (14).
(2) Remove the OGV (1) as follows:
(a) Remove the Engine Surface Air Cooling Oil Cooler (SACOC) (Ref. AMM TASK 79-21-30-000-802).
(b) Remove flowpath panels 1 to 4 (Ref. AMM TASK 72-24-09-000-801).
(c) Remove the OGV platform (2) (Ref. AMM TASK 72-24-11-000-801).
(d) Remove one OGV as follows:

CAUTION: YOU MUST REMOVE ONLY ONE OULET GUIDE VANE AT A TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT.

1 Remove the required segment shroud (3) (Ref. AMM TASK 72-24-01-000-801).
2 Remove the required strut panels (14) (Ref. AMM TASK 72-24-03-000-801) (Ref. AMM TASK 72-24-03-000-802) (Ref. AMM TASK 72-24-03-000-803).
3 Remove and examine the two inter OGV seals (13).
4 Remove the two bolts (9) and the two bolts (16) that attach the OGV (1) with the two OGV shims (11) and (15) to the fan case (12).

PRE SB 72-0235

5 Removal of the RTV:

WARNING: BE CAREFUL WHEN YOU USE SHARP OR POINTED TOOLS. THESE TOOLS CAN CAUSE AN INJURY TO YOU.

a Remove the RTV103 that fills the holes of the two bolts (7).

END OF PRE SB 72-0235

POST SB 72-0235

6 Remove and discard the OGV plug (17).
7 Removal of the RTV:

WARNING: BE CAREFUL WHEN YOU USE SHARP OR POINTED TOOLS. THESE TOOLS CAN CAUSE AN INJURY TO YOU.

a Remove remaining RTV103 from the heads of the two bolts (7).

END OF POST SB 72-0235

8 Remove the two bolts (7) that attach the OGV (1) to the fan hub (6).
9 Remove the two bolts (4) and the two washers (5) that attach the OGV (1) to the fan hub (6).
10 Remove the two OGV shims (11) and (15) from the OGV (1).
11 Carefully move the OGV (1) backward to disengage it from the fan hub (6).
12 Remove the OGV (1) from the engine.
(e) Follow step (2) (d) to remove the remaining OGVs (1).

[Rev.10 from 2021] 2026.04.01 02:53:16 UTC