Removal of the Ring Half Flowpath Fairing [CFML]

TASK 72-21-03-000-801-A
Removal of the Ring Half Flowpath Fairing

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.

1. Reason for the Job
This task gives the procedure for the removal of the two sectors of the ring half flowpath fairing.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 72-21-20-000-801-A	Removal of the Fan Blades
TASK 72-21-40-000-801-A	Removal of the Front Spinner
Ring Half Flow Path Fairing

3. Job Set-up
Subtask 72-21-03-941-051-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 FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 72-21-03-010-050-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 1M(3 FT) in position.

4. Procedure
Subtask 72-21-03-020-050-A

A. Removal of the two Sectors of the Ring Half Flowpath Fairings
(1) Remove the front spinner (Ref. AMM TASK 72-21-40-000-801).
(2) Remove the fan blades (Ref. AMM TASK 72-21-20-000-801).
(3) Remove the ring half flowpath fairing (1):
(a) Remove the five screws (3) that attach the ring half flowpath fairing (1) to the flow splitter (4).
(b) Remove the ring half flowpath fairing (1) from the engine.
(4) Remove the ring half flowpath fairing (2):
(a) Remove the five screws (5) that attach the ring half flowpath fairing (1) to the flow splitter (4).
(b) Remove the ring half flowpath fairing (2) from the engine.

[Rev.10 from 2021] 2026.04.01 13:03:50 UTC