Installation of the Core Drain Mast [CFML]

TASK 71-71-42-400-802-A
Installation of the Core Drain Mast

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.

FIN: 3141KM

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

REFERENCE	QTY	DESIGNATION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )
No specific	Torque wrench: range to between 0.79 and 0.68 m.daN (69.91 and 60.18 lbf.in )
No specific	Torque wrench: range to between 1.43 and 1.23 m.daN (126.55 and 108.85 lbf.in )
No specific	Torque wrench: range to between 3.47 and 2.96 m.daN (25.59 and 21.83 lbf.ft )
No specific	Torque wrench: range to between 6.09 and 5.21 m.daN (44.91 and 38.42 lbf.ft )
No specific	Torque wrench: range to between 8.80 and 7.47 m.daN (64.90 and 55.09 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CPNCL00062)	Synthetic base lubricating oil - turbine engine

C. 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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-11-000-801-A	Removal of the Nacelle Anti-Ice (NAI) Pressure Sensors and Sense Lines
TASK 30-21-11-400-801-A	Installation of the Nacelle Anti-Ice (NAI) Pressure Sensors and Sense Lines
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
Core Drain Mast

3. Job Set-up
Subtask 71-71-42-941-059-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) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch, and
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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 71-71-42-010-067-A

B. Get Access
(1) Make sure that the fan cowl doors are open (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

Subtask 71-71-42-040-051-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) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 71-71-42-010-068-A

D. Get Access

Core Drain Mast

(1) Make sure that the thrust reverser cowl-doors are open (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
(2) Make sure that the Nacelle Anti-Icing (NAI) pressure sensor sense line (17) is removed (Ref. AMM TASK 30-21-11-000-801).

4. Procedure
Subtask 71-71-42-420-061-A

A. Installation of the Core Drain Mast
(1) Remove all the COVER - PROTECTION and the CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Lubricate the threads of the bolt (2), the bolt (4) and the two bolts (14) with Synthetic base lubricating oil - turbine engine (Material No.CPNCL00062) .
(3) Put the core drain mast (3) in position on the engine.
(4) Attach the support bracket (16) to the air NAI duct (15) with the two bolts (14) and the two washers (18).
(5) Attach the six coupling nuts (6), (7), (8), (9), (10) and (11) to the core drain mast (3).
(6) Install the bolt (4) in the support bracket (1).
(7) Install the bolt (2) in the support bracket (1).
(8) TORQUE the coupling nut (8) to between 6.09 and 5.21 m.daN (44.91 and 38.42 lbf.ft )

.
(9) TORQUE the coupling nut (7) to between 3.47 and 2.96 m.daN (25.59 and 21.83 lbf.ft )

.
(10) TORQUE the coupling nut (6) to between 6.09 and 5.21 m.daN (44.91 and 38.42 lbf.ft )

.
(11) TORQUE the coupling nut (9) to between 8.80 and 7.47 m.daN (64.90 and 55.09 lbf.ft )

.
(12) TORQUE the coupling nut (10) to between 6.09 and 5.21 m.daN (44.91 and 38.42 lbf.ft )

.
(13) TORQUE the coupling nut (11) to between 3.47 and 2.96 m.daN (25.59 and 21.83 lbf.ft )

.
(14) TORQUE the two bolts (14) to between 0.79 and 0.68 m.daN (69.91 and 60.18 lbf.in )

.
(15) TORQUE the bolt (2) to between 1.43 and 1.23 m.daN (126.55 and 108.85 lbf.in )

.
(16) TORQUE the bolt (4) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in )

5. Close-up
Subtask 71-71-42-410-054-A

A. Close Access

Core Drain Mast

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install NAI pressure-sensor sense-line (17) (Ref. AMM TASK 30-21-11-400-801).
(3) 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 71-71-42-440-050-A

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

Subtask 71-71-42-410-055-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 WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 07:32:21 UTC