-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
4. Procedure
_________
(Ref. Fig. 401/TASK 49-41-41-991-004) Subtask 49-41-41-420-052
A. Installation of the Igniter Plug(s). NOTE : There are two igniter plugs mounted in the combustion casing, one
____ at 270 degrees and one at 120 degrees, viewed from the rear. The installation procedure is the same for both.
(1)
Apply COMMON GREASE (Material No. 04-014) to the threads of the igniter plug(s) (2).
(2)
Install the igniter plug(s) (2) in the combustor assembly.
(3)
TORQUE the igniter plug(s) to between 111 and 132 lbf.in (1.25 and
1.49 m.daN).
(4)
Make sure that the electrical connectors are clean and in the correct condition.
(5)
Connect the igniter cable(s) (1) to the igniter plug(s) (2).
(6)
TORQUE the igniter cable(s) to between 26 and 32 lbf.in (0.29 and
0.36 m.daN).
(7)
Connect the LT connector P10 to the ignition exciter. Subtask 49-41-41-865-057
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-41-41-710-051
C. Do the self-test of the ECB (Ref. TASK 49-00-00-710-005).
5. Close-up
________ Subtask 49-41-41-410-052
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(3)
Remove the access platform(s).
(4)
Remove the warning notice(s).
PLUG - IGNITER ((GTCP 36-300)) - INSPECTION/CHECK
_________________________________________________ R **ON A/C 001-003, 051-099, 401-499,
TASK 49-41-41-220-002 Detailed Visual Inspection of Igniter Plug (8031KM) (GTCP 36-300) WARNING : DISCONNECT THE LOW TENSION ELECTRICAL SUPPLY 5 MINUTES BEFORE YOU
_______ START WORK ON THE IGNITION SYSTEM. ALSO, GROUND THE IGNITER LEAD WITH AN INSULATED DEVICE AS YOU DISCONNECT IT FROM THE IGNITER PLUG. HIGH CURRENT AND VOLTAGE, WHICH ARE USED IN THE IGNITION SYSTEM, CAN KILL YOU.
WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______
WHEN YOU DO THE MAINTENANCE TASK(S).
1. Reason for the Job
__________________
Refer to the MPD TASK: 494141-01
Detailed visual inspection of the igniter plug (8031KM)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-41-41-000-001 Removal of the Igniter Plug (8031KM) (GTCP 36-300) 49-41-41-400-001 Installation of the Igniter Plug (8031KM) (GTCP 36-300)
3. Job Set-up
__________
Subtask 49-41-41-020-056
A. Remove the igniter plug (8031KM) (Ref. TASK 49-41-41-000-001).
4. Procedure
_________ Subtask 49-41-41-210-053
A. Inspect the Igniter Plug (8031KM)
NOTE : There is only one igniter plug installed in this APU.
____
(1)
Visually examine the igniter plug for broken or missing parts. Shake the igniter plug for signs of loose parts. Replace the igniter plug, if necessary.
(2)
Examine the igniter plug for internal wear and damage.
(3)
Examine the center electrode and the outer shell for erosion. If the distance between the edge of the electrode and the inside of the uneroded edge of the ground shell tip exceeds 2.3 mm (0.09 in.), replace the igniter plug. Constant erosion on the electrode and the outer shell is permitted.
(4)
Examine the ceramic insulator for cracks or damaged area. Replace the igniter plug if the ceramic insulator is damaged.
(5)
Examine the outer shell for burned or melted metal. Replace the plug if metal is burned or melted.
(6)
Examine the mating flange of the igniter plug for a groove. Replace the igniter plug if it has a groove on one side which has a depth of
0.77 mm (0.03 in.) or more.
(7)
Examine the igniter plug electrical connection. Replace the igniter plug if the electrical connection pin is bent or burned.
(8)
Examine the part of the igniter plug that has the thread for signs of distortion or damaged threads. Replace the igniter plug if the threads are damaged.
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