Detailed Inspection of the Air Intake Cowl, "A1" Flange Attachment [CFML]

TASK 71-60-41-220-801-A
Detailed Inspection of the Air Intake Cowl, "A1" Flange Attachment

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

ZONE: 410
ZONE: 420

1. Reason for the Job
Refer to the MPD TASK: 716111-01
DETAILED INSPECTION OF AIR INTAKE COWL, "A1" FLANGE ATTACHMENT.
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	1	LIGHT SOURCE - INSPECTION
No specific	1	MAGNIFYING GLASS POWER 10X
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14SBA1)	Textile-Lint free Cotton -

C. 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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. 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 71-61-41-000-802-A	Removal of the Air Intake Cowl
TASK 71-61-41-400-802-A	Installation of the Air Intake Cowl
SRM 512200
SRM 541000
Detailed Inspection of the Air Intake Cowl, "A1" Flange Attachment

3. Job Set-up
Subtask 71-60-41-941-052-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 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 71-60-41-010-050-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 71-60-41-220-050-A

A. Detailed Inspection of the Air Intake Cowl, "A1" Flange Attachment
(1) Clean the inspection area with a Textile-Lint free Cotton - (Material No.14SBA1) to remove unwanted debris, dirt and grease.
(2) Do a detailed inspection of the intake cowl attachment ring (9).
(a) Use a LIGHT SOURCE - INSPECTION and a MAGNIFYING GLASS POWER 10X.
1 Examine the attachment ring (9) for corrosion, nicks, gouges, holes, scratches, missing or loose fasteners and other damage.
a If you find corrosion damage, repair or replace the damaged component parts SRM 512200.
b If you find other damage, look for damage limits and corrective action SRM 541000.
2 Examine the bolts (1), washers (2) and nuts (4) that attach the intake cowl (8) assembly to the engine fan case (3).
a Look for damage or missing parts.
b If you find damage or missing parts, replace the parts (Ref. AMM TASK 71-61-41-000-802) and (Ref. AMM TASK 71-61-41-400-802).
c Examine the alignment pins (5), washers (6) and nuts (7).
d If you find damage, replace the parts (Ref. AMM TASK 71-61-41-000-802) and (Ref. AMM TASK 71-61-41-400-802).

5. Close-up
Subtask 71-60-41-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the 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
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 06:33:31 UTC