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4. Procedure
_________ (Ref. Fig. 401/TASK 74-11-10-991-300) Subtask 74-11-10-420-052
A. Install the Upper and Lower Ignition Exciters:
(1) Apply a thin layer of graphite grease (Material No. CP2101) on the threads and friction surface of the studs (10).
(2) Install the upper ignition exciter (50) on the upper studs (10) and the lower ignition exciter (110) on the lower studs (10).
(3) Place the end of the ground strap (80) on the nearest stud (10). The ground strap (80) is installed between the washer (30) and the ignition exciter (50), (110).
(4) Install the washers (30) and nuts (20) as follows:
(a) Put the washers (30) on the studs (10). Make sure the ground strap (80) is between the washers (30) and the ignition exciter (50), (110).
(b) Install the nuts (20). Do not let the stud (10) turn in the resilient mount (150). Hold the stud (10) with an open-end wrench. The wrench flats (160) are locate between the resilient mount (150) and the ignition exciter (50), (110).
(c) TORQUE the nuts (20) to between 55 and 70 lbf.in (0.62 and 0.79 m.daN). Hold the stud (10) and turn the nut (20).
Subtask 74-11-10-420-054
B. Connection of the Ignition Leads and Power Supply Cables:
(1) Remove the blanking caps from the disconnected electrical connectors, power supply cables and ignition leads.
(2) Connect the right-side ignition lead (140) to the electrical input connector (40) on the aft side of the upper ignition exciter (50).
(3) Connect the left-side ignition lead (130) to the electrical input connector (120) on the aft side of the lower ignition exciter (110).
(4) TORQUE the connector nuts of the ignition exciter (140), (130) to between 140 and 160 lbf.in (1.58 and 1.80 m.daN).
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(5) Connect the upper power supply cable (70) to the electrical input connector (60) on the forward side of the ignition exciter (50).
(6) Connect the lower power supply cable (90) to the electrical input connector (100) on the forward side of the ignition exciter (110).
(7) Tighten the connector nuts of the power supply cables (70), (90) with your hand, plus one-eight of a turn. If necessary, use soft-nose pliers.
Subtask 74-11-10-865-059
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1JH FOR 1000EM1 2JH1, 3JH1 FOR 1000EM2 2JH2, 3JH2
Subtask 74-11-10-710-052
D. Perform an operationnal test of the ignition system (Ref. TASK 74-00-00-710-043).
5. Close-up
________
Subtask 74-11-10-410-053
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(3) Remove the warning notice(s).
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IGNITION EXCITER (4000JH1,4000JH2) - INSPECTION/CHECK
_____________________________________________________
TASK 74-11-10-200-002
Inspection/Check of the Ignition Exciter (4000JH1, 4000JH2)
R WARNING : BE SURE EXCITERS ARE DE-ENERGIZED FOR AT LEAST 5 MINUTES BEFORE_______
R WORKING ON THE IGNITION SYSTEM. VOLTAGE OUTPUT CAN BE DANGEROUS. DO
R NOT TOUCH THE ELECTRICAL CONTACTS, EXCITERS MAY CONTAIN AN ELECTRICAL
R CHARGE EVEN WHEN THEY ARE NOT ENERGIZED.
R
1. Reason for the Job
__________________
The upper ignition exciter is connected to the right ignition lead. The
lower ignition exciter is for the left ignition lead.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific circuit breaker(s) safety clip(s)
No specific warning notice
B. Referenced Information
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REFERENCE DESIGNATION
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