Visual Inspection of the Turbine Rear Frame Module [CFML]

TASK 72-59-00-210-801-A
Visual Inspection of the Turbine Rear Frame Module

1. Reason for the Job
This procedure gives the criteria for the visual inspection of the turbine rear frame module.

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 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, 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 72-59-04-200-801-A	Visual inspection of the Low Pressure Turbine (LPT) Rear Frame
TASK 72-59-80-210-801-A	Visual Inspection of the Bearing 5 Oil Nozzle
TASK 72-59-81-200-801-A	Visual Inspection of the Oil Supply Tubes and the Damper Oil Supply Tubes
TASK 72-59-83-210-801-A	Visual Inspection of the Center Vent Tube (CVT)
TASK 72-59-83-210-802-A	Visual Inspection of the Exhaust Tube
TASK 72-59-84-210-801-A	Visual Inspection of the Tube and the Oil Drain Tube
TASK 75-33-05-210-801-A	Visual Inspection of the Transient Bleed Valve (TBV)
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
TRF Module - TBV Ducts and Oil Tubes
TRF Module - Center Ventilation Tube Support
TRF Module - Rear Enclosure Cover and No. 5 Bearing Oil Nozzle
TRF Module - Exhaust Tube and Central Ventilation Tube
TRF Module - Exhaust Tube Support
TRF Module - Injection Nozzle

3. Job Set-up
Subtask 72-59-00-941-050-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
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 72-59-00-010-050-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.

Subtask 72-59-00-040-050-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 ground maintenance (Ref. AMM TASK 78-30-00-040-809).

Subtask 72-59-00-010-051-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 72-59-00-210-050-A

A. Visual Inspection of the TRF module (1)
(1) Inspect the following parts:
(a) Low Pressure Turbine (LPT) rear frame (2) (Ref. AMM TASK 72-59-04-200-801).
(b) Transient Bleed Valve (TBV) duct (4) (Ref. AMM TASK 75-33-05-210-801).
(c) Oil supply tubes (6) (Ref. AMM TASK 72-59-81-200-801).
(d) Oil drain tube (7) (Ref. AMM TASK 72-59-84-210-801).
(e) No. 5 bearing oil nozzle (3) (Ref. AMM TASK 72-59-80-210-801).
(f) Center vent tube (5) (Ref. AMM TASK 72-59-83-210-801).
(g) Oil scavenge tube (8) (Ref. AMM TASK 72-59-04-200-801).
(h) Center vent tube support (11).
(i) Exhaust tube (9) (Ref. AMM TASK 72-59-83-210-802).
(2) Visual inspection of the exhaust tube support (10) and the rear enclosure cover (12).

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Visual inspection of the coating of the exhaust tube support (10)
A.Separation of coating liner	Not serviceable	Contact your CFM representative.
B.Flaking, missing material	Not serviceable	Contact your CFM representative.
2.Visual inspection of the all areas of the rear enclosure cover (12)
A.Cracks	Not serviceable	Contact your CFM representative.
B.Nicks, dents, scratches	Not more than 0.020 in. (0.51 mm) in depth
C.Cracks in weld	Not serviceable	Contact your CFM representative.
D.Discoloration	Any amount, if no distorsion
3.Visual examination of the external areas of the injection nozzle (14) TRF Module - Injection Nozzle
A.Coking	Any amount

5. Close-up
Subtask 72-59-00-410-050-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 72-59-00-440-050-A

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

Subtask 72-59-00-410-051-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 02:53:59 UTC