Replacement of the Thrust Reverser Precooler Scoop [CFML]

TASK 78-32-66-960-801-A
Replacement of the Thrust Reverser Precooler Scoop

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.

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) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3.64 and 3.16 m.N (32.21 and 27.96 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL01420)	SEALANT LOW DENSITY-FUEL TANK & GP
(Material No.CPNCL02069)	LINT-FREE COTTON CLOTH
(Material No.CPNCL02589)	GENERAL CLEANING AGENT - MULTI PURPOSE

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
6	EQUIPPED PRECOOLER SCOOP	AIPC 78-30-25-11-200
4	COLLARS	AIPC 78-30-25-11-210
3	WASHERS	AIPC 78-30-25-11-220
1	HI-LITE PINS	AIPC 78-30-25-11-230
2	HI-LITE PIN	AIPC 78-30-25-11-240
5	BLIND BOLTS	AIPC 78-30-25-11-250

E. 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 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
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
Precooler Scoop

3. Job Set-up
Subtask 78-32-66-941-050-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 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 78-32-66-010-050-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 2M (6 FT) - ADJUSTABLE in position.

Subtask 78-32-66-040-050-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 nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 78-32-66-010-051-A

D. Get Access
(1) Open the right thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

4. Procedure
Subtask 78-32-66-960-050-A

A. Replacement of the Thrust-Reverser Precooler Scoop

CAUTION: DURING EACH OPERATION, BE CAREFUL NOT TO CAUSE DAMAGE TO THE ADJACENT STRUCTURES.

(1) Removal of the equipped precooler scoop (6):

NOTE: Two persons are necessary to do this task. One person must be on the forward side of the front frame to remove the fasteners and the second person must be under the thrust reverser to keep the equipped precooler scoop (6) in position on the thrust reverser.

(a) Remove and discard the collars (4) and the washers (3).
(b) Remove and discard the hi-lite pins (1) and (2).
(c) Remove and discard the blind bolts (5).

NOTE: Use a tool with (or without) a drive washer for the removal of the blind bolts (5).

(d) Remove and discard the equipped precooler scoop (6).
(e) Remove the SEALANT LOW DENSITY-FUEL TANK & GP (Material No.CPNCL01420) from the equipped precooler scoop (6).
(f) Clean the work area with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) made moist with GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) .
(g) Dry the work area with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) before the GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) becomes gas.
(2) Preparation of the new AIPC 78-30-25-11-200 EQUIPPED PRECOOLER SCOOP (6):

WARNING: WHEN YOU DRILL, MACHINE, BLEND, GRIND OR SAND PARTS, USE PROTECTIVE CLOTHING, GLOVES, DUST MASK AND GOGGLES. BE CAREFUL NOT TO BREATHE THE DUST OR LET IT TOUCH YOUR SKIN. DUST AND PARTICLES ARE DANGEROUS FOR YOUR HEALTH.

(a) Use a template or a locally manufactured tool to mark and record the position of the holes for the hi-lite pins (1) and (2) and blind bolts (5) on the new equipped precooler scoop (6).
(b) Drill the holes for the hi-lite pins (1) and (2) and blind bolts (5) on the new equipped precooler scoop (6).
(c) Clean the work area with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) made moist with GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) .
(d) Dry the work area with a LINT-FREE COTTON CLOTH (Material No.CPNCL02069) before the GENERAL CLEANING AGENT - MULTI PURPOSE (Material No.CPNCL02589) becomes gas.
(3) Installation of the new equipped precooler scoop (6):

NOTE: All the fasteners must be installed with SEALANT LOW DENSITY-FUEL TANK & GP (Material No.CPNCL01420) .

(a) Apply a thin layer of SEALANT LOW DENSITY-FUEL TANK & GP (Material No.CPNCL01420) on the contact surfaces of the new equipped precooler scoop (6).
(b) Put the new equipped precooler scoop (6) in position.
(c) Install the three new AIPC 78-30-25-11-230 HI-LITE PINS (1) and one new AIPC 78-30-25-11-240 HI-LITE PIN (2).
(d) Install the 20 new AIPC 78-30-25-11-250 BLIND BOLTS (5).
(e) Install the four new AIPC 78-30-25-11-220 WASHERS (3) and the four new AIPC 78-30-25-11-210 COLLARS (4).

NOTE: The washers (3) must be installed on the collar side.

1 If the collar (Part number: KFN579-3K) is used, then TORQUE the collar (4)
to between 3.64 and 3.16 m.N (32.21 and 27.96 lbf.in )

.
(f) Apply a bead of SEALANT LOW DENSITY-FUEL TANK & GP (Material No.CPNCL01420) all around the new equipped precooler scoop (6) and fill the gap.

NOTE: Let the SEALANT LOW DENSITY-FUEL TANK & GP (Material No.CPNCL01420) cure. Refer to the manufacturer's instructions for the cure time.

5. Close-up
Subtask 78-32-66-410-050-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

Subtask 78-32-66-440-050-A

B. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 78-32-66-410-051-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 03:36:38 UTC