Installation of Ignition Exciter 1 [CFML]

TASK 74-11-05-400-801-A
Installation of Ignition Exciter 1

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.

CAUTION: MAKE SURE THAT YOUR HANDS AND TOOLS ARE CLEAN. DO NOT TOUCH THE IGNITION LEAD OR THE SPARK IGNITER WITH DIRTY OR GREASY HANDS AND TOOLS, DIRT AND GREASE WILL CAUSE DAMAGE TO THE IGNITION LEAD AND THE SPARK IGNITER.

ZONE: 400
FIN: 4000JH11
FIN: 4000JH12

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 37 and 33 lbf.in (0.42 and 0.37 m.daN )
No specific	Torque wrench: range to between 59 and 51 lbf.in (0.67 and 0.58 m.daN )
No specific	Torque wrench: range to between 162 and 138 lbf.in (1.83 and 1.56 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
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 70-70-00-910-804-A	Electrical Standard Practices
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 74-00-00-710-803-A	Ignition Test (Menu Mode)
TASK 74-21-05-400-802-A	Installation of the Ignition Lead 1
TASK 78-30-00-040-809-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-809-A	Reactivation of the Thrust Reverser System after Ground Maintenance
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
Ignition Exciter 1

3. Job Set-up
Subtask 74-11-05-941-050-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) 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 74-11-05-865-050-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42

Subtask 74-11-05-010-050-A

C. 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 74-11-05-040-050-A

D. 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 78-30-00-040-809).

Subtask 74-11-05-010-051-A

E. Get Access
(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.

4. Procedure
Subtask 74-11-05-420-050-A

A. Installation of Ignition Exciter 1
(1) Remove all the COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Put ignition exciter 1 (1) in position on the exciter box shroud (2).
(3) Apply engine oil (Material No.CP2442) to the threads and friction surfaces of the four bolts (7).

PRE SB 72-0402
(4) Install the four bolts (7) that attach ignition exciter 1 (1) to the exciter box shroud (2).
(5) TORQUE the four bolts (7) to between 59 and 51 lbf.in (0.67 and 0.58 m.daN )

.
End PRE SB 72-0402

POST SB 72-0402
(6) Install the three bolts (7) to attach ignition exciter 1 (1) to the exciter box shroud (2).

CAUTION: MAKE SURE THAT THE BONDING STRAP(S) IS(ARE) CONNECTED BEFORE YOU CONNECT THE ELECTRICAL CONNECTOR(S).

(7) Install the bolt (7) to attach the bonding strap (8) to the ignition exciter 1 (1).
(8) TORQUE the four bolts (7) to between 37 and 33 lbf.in (0.42 and 0.37 m.daN )

.
END of POST SB 72-0402
(9) Connect the electrical connector (6) to ignition exciter 1 (1) (Ref. AMM TASK 70-70-00-910-804).
(10) Connect ignition lead 1 (5) to ignition exciter 1 (1) as follows:

CAUTION: DO NOT TWIST OR BEND THE IGNITION LEADS. IF YOU DO, DAMAGE TO THE LEADS CAN OCCUR.

(a) Install the ignition lead 1 (5) silicone rubber tip into ignition exciter 1 (1).
(b) Torque the ignition lead 1 (5) B-nut as follows:

CAUTION: MAKE SURE THE OUTPUT (HIGH TENSION) LEADS ARE CORRECTLY INSTALLED. INSUFFICIENT TORQUE ON THE LEAD NUTS AT THE EXCITER AND IGNITER ENDS CAN CAUSE IGNITION RADIATED NOISE WHICH CAN BE PICKED UP BY AIRCRAFT RADIO EQUIPMENT.

1 TORQUE the ignition lead 1 (5) B-nut to between 162 and 138 lbf.in (1.83 and 1.56 m.daN )

.
(11) Install the ignition lead 1 (5) (Ref. AMM TASK 74-21-05-400-802).
(12) Apply engine oil (Material No.CP2442) to the threads and friction surfaces of the four bolts (4).
(13) Put the exciter box shroud lid (3) in position on the exciter box shroud (2).
(14) Install the four bolts (4) that attach the exciter box shroud lid (3) to the exciter box shroud (2).
(15) TORQUE the four bolts (4) to between 59 and 51 lbf.in (0.67 and 0.58 m.daN )

5. Close-up
Subtask 74-11-05-865-051-A

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENGINE 1)
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENGINE 2)
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42

Subtask 74-11-05-710-050-A

B. Test
(1) Do the ignition test menu mode (Ref. AMM TASK 74-00-00-710-803).

Subtask 74-11-05-410-050-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) 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 74-11-05-440-050-A

D. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-809).

Subtask 74-11-05-410-051-A

E. 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] 2026.04.01 03:08:39 UTC