Replacement of the Air Intake Ertacetal Strips [CFML]

TASK 71-60-41-960-802-A
Replacement of the Air Intake Ertacetal Strips

WARNING: BEFORE YOU DO WORK ON OR NEAR THE ENGINES, PUT A WARNING NOTICE IN THE COCKPIT. THIS WARNING NOTICE MUST TELL PERSONS NOT TO START THE ENGINES DURING THE PROCEDURE. IF THE ENGINES START WHILE YOU ARE NEAR THEM, THE SUCTION CAN PULL YOU INTO OR AGAINST THE AIR INTAKE. THIS CAN KILL YOU OR CAUSE INJURY TO YOU.

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: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

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

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	1	EXTRATOR - PIN DIA 3 MM (0.1 IN)
No specific	1	MALLET - PLASTIC
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. 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

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
Air Inlet Cowl Ertacetal Strip

3. Job Set-up
Subtask 71-60-41-941-053-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 71-60-41-010-051-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 2M (6 FT) in position.

4. Procedure
Subtask 71-60-41-960-050-A

CAUTION: BE CAREFUL NOT TO CAUSE DAMAGE TO THE ADJACENT STRUCTURES WHEN YOU DO THESE OPERATIONS.

CAUTION: REPLACE THE HIGH SPEED TAPE WITH THE TEFLON STRIP WITHIN 750 FLIGHT HOURS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.

A. Replacement of Air-Inlet Cowl Ertacetal-Strip

Air Inlet Cowl Ertacetal Strip

NOTE: This procedure is given for one ertacetal strip. It is also applicable to the other ertacetal strips of the air inlet cowl.

NOTE: There are eight ertacetal strips on the air inlet cowl.

(1) Removal of the damaged ertacetal strip (1):
(a) Use a EXTRATOR - PIN DIA 3 MM (0.1 IN) and drill out the plastic rivets (2) that attach the ertacetal strip (1) to the air inlet cowl.
(b) Remove and keep the damaged ertacetal strip (1) or the high speed tape.
(c) Use the damaged ertacetal strip (1) or the high speed tape as a drilling template.
(2) Installation of a new ertacetal strip (1):
(a) Clean the contact area of the air-inlet cowl frame with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Dry the contact area of the air inlet cowl with Textile-Lint free Cotton - (Material No.14SBA1) before the solvent becomes gas.
(c) Use a locally marked or the damaged ertacetal strip as a template and record the positions of the rivet holes on the new segment of the ertacetal strip (1).
(d) Drill rivet holes of diameter between 4.88 mm (0.19 in.) and 4.98 mm (0.20 in.) through the new segment of the ertacetal strip (1).
(e) Deburr the rivet holes.
(f) Install the new ertacetal strip (1) on the air inlet cowl and tap the strip with a MALLET - PLASTIC.
(g) Install the clamps on each end of the ertacetal strip (1).
(h) Install the plastic rivets (2) that attach the ertacetal strip (1) to the air inlet cowl.
(i) Remove the clamps from the ends of the ertacetal strip (1).

5. Close-up
Subtask 71-60-41-410-052-A

A. Close Access
Make sure that the work area is clean and clear of tools and other items.
(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] 2026.04.02 06:33:31 UTC