Visual Inspection of the Segment Shrouds and Louvers [CFML]

TASK 72-24-01-210-801-A
Visual Inspection of the Segment Shrouds and Louvers

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 procedure gives the criteria for the visual inspection of segment shrouds 1 to 5.

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 72-24-01-000-801-A	Removal of Segment Shrouds 1 thru 5
TASK 72-24-01-400-801-A	Installation of Segment Shrouds 1 thru 5
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
Segment Shroud 1
Segment Shroud 2
Segment Shroud 3
Segment Shroud 4
Segment Shroud 5

3. Job Set-up
Subtask 72-24-01-941-054-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 a 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 72-24-01-010-058-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 72-24-01-040-054-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 72-24-01-010-059-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 72-24-01-210-050-A

A. Visual Inspection of Segment Shrouds 1 to 5:

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Visual inspection of all the areas of segment shroud 1 (1):
A.Fretting, erosion, wear	Any amount, if dimension A is between 0.094 in. (2.4 mm) and 0.102 in. (2.6 mm)
2.Visual inspection of area B of segment shroud 1 (1):
A.Dents	Any number, if not more than 0.023 in. (0.6 mm) in depth
3.Visual inspection of area C of segment shroud 1 (1)
A.Dents	Not serviceable	Replace the segment shroud 1 (1) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
4.Visual inspection of area D of segment shroud 1 (1)
A.Nicks, scratches, cracks	Not serviceable	Replace segment shroud 1 (1) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
5.Visual inspection of area E of segment shroud 1 (1)
A.Nicks, scratches, cracks	Any number, if not more than 0.023 in. (0.6 mm) in depth
6.Visual inspection of area F of segment shroud 1 (1)
A.Nicks, scratches, cracks	Any number, if not more than 0.007 in. (0.2 mm) in depth
7.Visual inspection of all the areas of segment shroud 2 (2):
A.Fretting, erosion, wear	Any amount, if dimension A is between 0.094 in. (2.4 mm) and 0.102 in. (2.6 mm).
8.Visual inspection of area B of segment shroud 2 (2)
A.Dents	Any number, if not more than 0.023 in. (0.6 mm) in depth
9.Visual inspection of area C of segment shroud 2 (2)
A.Dents	Not serviceable	Replace segment shroud 2 (2) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
10.Visual inspection of area D of segment shroud 2 (2)
A.Nicks, scratches, cracks	Not serviceable	Replace segment shroud 2 (2) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
11.Visual inspection of area E of segment shroud 2 (2)
A.Nicks, scratches, cracks	Any number, if not more than 0.023 in. (0.6 mm) in depth
12.Visual inspection of the pin (6) of segment shroud 2 (2)
A.Missing	Not serviceable	Replace segment shroud 2 (2) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
B.Looseness	Not serviceable	Replace segment shroud 2 (2) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
C.Damage	Not serviceable	Replace segment shroud 2 (2) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
13.Visual inspection of all the areas of segment shroud 3 (3):
A.Fretting, erosion, wear	Any amount, if dimension A is between 0.094 in. (2.4 mm) and 0.102 in. (2.6 mm).
14.Visual inspection of area B of segment shroud 3 (3)
A.Dents	Any number, if not more than 0.023 in. (0.6 mm) in depth
15.Visual inspection of area C of segment shroud 3 (3)
A.Dents	Not serviceable	Replace segment shroud 3 (3) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
16.Visual inspection of area D of segment shroud 3 (3)
A.Nicks, scratches, cracks	Not serviceable	Replace segment shroud 3 (3) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
17.Visual inspection of area E of segment shroud 3 (3)
A.Nicks, scratches, cracks	Any number, if not more than 0.023 in. (0.6 mm) in depth
18.Visual inspection of all the areas of segment shroud 4 (4):
A.Fretting, erosion, wear	Any amount, if dimension A is between 0.094 in. (2.4 mm) and 0.102 in. (2.6 mm).
19.Visual inspection of area B of segment shroud 4 (4)
A.Dents	Any number, if not more than 0.023 in. (0.6 mm) in depth
20.Visual inspection of area C of segment shroud 4 (4)
A.Dents	Not serviceable	Replace segment shroud 4 (4) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
21.Visual inspection of area D of segment shroud 4 (4)
A.Nicks, scratches, cracks	Not serviceable	Replace segment shroud 4 (4) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
22.Visual inspection of area E of segment shroud 4 (4)
A.Nicks, scratches, cracks	Any number, if not more than 0.023 in. (0.6 mm) in depth
23.Visual inspection of all the areas of segment shroud 5 (5):
A.Fretting, erosion, wear	Any amount, if dimension A is between 0.094 in. (2.4 mm) and 0.102 in. (2.6 mm).
24.Visual inspection of area B of segment shroud 5 (5)
A.Dents	Any number, if not more than 0.023 in. (0.6 mm) in depth
25.Visual inspection of area C of segment shroud 5 (5)
A.Dents	Not serviceable	Replace segment shroud 5 (5) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
26.Visual inspection of area D of segment shroud 5 (5)
A.Nicks, scratches, cracks	Not serviceable	Replace segment shroud 5 (5) (Ref. AMM TASK 72-24-01-000-801) and (Ref. AMM TASK 72-24-01-400-801).
27.Visual inspection of area E of segment shroud 5 (5)
A.Nicks, scratches, cracks	Any number,if not more than 0.023 in. (0.6 mm) in depth

5. Close-up
Subtask 72-24-01-410-054-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 72-24-01-440-052-A

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

Subtask 72-24-01-410-055-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 02:52:37 UTC