Depreservation of the Air Intake Cowl Lipskin [IAE]

TASK 71-11-11-630-801-A
Depreservation of the Air Intake Cowl Lipskin

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.

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.

ZONE: 431
ZONE: 441

1. Reason for the Job
This procedure gives instructions to remove the protective coating from the air intake cowl lipskin after parking or storage. Refer to ATA Chapter 10 and 71 for more information before you do this procedure.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	COVER - PROTECTION
No specific	1	SCRAPER - NON METALLIC
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-012)	isopropyl alcohol (CH3)2 CHOH
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
431	ENGINE AIR INTAKE
441	ENGINE AIR INTAKE

D. Referenced Information

REFERENCE	DESIGNATION
Air Intake Cowl Lipskin

3. Job Set-up
Subtask 71-11-11-941-068-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU, put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
(3) On the overhead panel, on panel 22VU, make sure that th DUAL COOLING control switch is set to the OFF position before the start of this procedure.
(4) On the overhead panel, on maintenance panel 50VU:
(a) Make sure that the ENG/FADEC GND PWR/1(2) pushbutton switch is released (the ON legend is off).
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 71-11-11-010-064-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position:
(a) FOR [1000EM1] (ENGINE-1)
At zone 431.
(b) FOR [1000EM2] (ENGINE-2)
At zone 441.

4. Procedure
Subtask 71-11-11-630-052-A ** ON A/C NOT FOR ALL

A. Depreservation of the Air Intake Cowl Lipskin after Storage
(1) Make sure that you remove and install all the COVER - PROTECTION as necessary to prevent damage to the engine and adjacent components.
(2) Make sure that you wipe clean all parts and tools as necessary to remove unwanted debris and prevent damage to the engine and adjacent components.
(3) Remove the protective coating from the air intake cowl lipskin:
(a) Remove the tapes and the peel off the protective coating with your hands. Refer to the instructions of the manufacturer if necessary.
(b) Remove the protective coating. You can use the SCRAPER - NON METALLIC to help you. Do not use tools harder than the aluminum lipskin to prevent damage.
(c) Clean the surface of the air intake cowl lipskin with a clean Textile-Lint free Cotton - (Material No.14SBA1) and the V01-012isopropyl alcohol (CH3)2 CHOH.
(d) Remove the V01-012isopropyl alcohol (CH3)2 CHOH with a clean Textile-Lint free Cotton - (Material No.14SBA1) before the solvent dries.
(4) Do a general visual inspection of the air intake cowl lipskin.

5. Close-up
Subtask 71-11-11-410-060-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:28:44 UTC