(9)
Examine the annular space between the insulator and the outer shell. If clogged, change the igniter plug.
5. Close-up
________ Subtask 49-41-41-420-056
A. Install Igniter Plug (8031KM) (Ref. TASK 49-41-41-400-001).
PLUG - IGNITER ((131-9(A))) - INSPECTION/CHECK
______________________________________________ TASK 49-41-41-220-001 Detailed Inspection of Igniter Plugs (131-9(A)) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
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.
1.
Reason for the Job
__________________
Refer to the MPD TASK: 494000-B2
2.
Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-41-41-000-005 Removal of Igniter Plug (131-9(A)) 49-41-41-400-004 Installation of Igniter Plug (131-9(A))
3. Job Set-up
__________ Subtask 49-41-41-020-055
A. Remove the igniter plug (Ref. TASK 49-41-41-000-005).
4. Procedure
_________ Subtask 49-41-41-210-052
A. Inspect the Igniter Plug.
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.
R EFF : 001-049, 101-105, 107-107, 151-199, 49-41-41Page 601 201-210, Config-2 Aug 01/05
CES
(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 (0.90 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.
(9)
Examine the annular space between the insulator and the outer shell. If clogged, change the igniter plug.
5. Close-up
________
Subtask 49-41-41-420-055
A. Install Igniter Plug (Ref. TASK 49-41-41-400-004).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-41-41Page 602 201-210, Config-2 Aug 01/05
CES
PLUG - IGNITER ((APS 3200)) - INSPECTION/CHECK
______________________________________________ TASK 49-41-41-200-001 Detailed Visual Inspection of the Igniter Plugs (APS 3200) 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: 494000-A1
2.
Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-41-41-000-003 Removal of the Igniter Plug(s) (APS 3200) 49-41-41-400-002 Installation of the Igniter Plug(s) (APS 3200) 49-41-41-991-006 Fig. 601
3. Job Set-up
__________ Subtask 49-41-41-020-053
A. Remove the two igniter plugs (Ref. TASK 49-41-41-000-003).
4. Procedure
_________ (Ref. Fig. 601/TASK 49-41-41-991-006) Subtask 49-41-41-200-052
A. Inspection of the Igniter Plugs
(1)
Examine the ceramic parts of both igniter plugs for cracks or carbon deposits.
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