(e)  
If the spark igniter does not seat correctly against the aft
 flange of the ignition lead, do this:
 1) Repair with the repair step for the socket contact.

 (f)  
If the force necessary to remove the gage pin is less than

 3.2 ounces (90.7 gm), replace the ignition lead
 (AMM 74-21-01/401).

 (5)  
Repair the socket contact with the diamond machine file as follows:

 S 358-006-C00
 CAUTION: LIGHTLY HIT THE IGNITION LEAD CONNECTOR AGAINST THE PALM
_______ OF YOUR HAND QUICKLY UNTIL YOU REMOVE THE PARTICLES. DO NOT HIT THE CONNECTOR AGAINST A HARD SURFACE. YOU CAN CAUSE DAMAGE TO OR HAVE A CRACK IN THE CERAMIC INSULATOR.
 (a)  
Remove the material from the ID of the socket with a file in a rearward and forward motion.

 (b)  
Measure the depth you install the pin with the step for an ID clearance check of the socket contact.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. TYPE 3 AND TYPE 4 IGNITION LEAD ú

 74-21-01
 ú ú C02 Page 807 ú Jul 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(c)  
Measure the removal force with the step that does an ID clearance check of the socket contact.

 (d)  
Do the step to remove the material until the igniter plug seats correctly. 1) The force to remove the gage pin must be between

 3.2 to 40.0 ounces (90.7 to 1134 gm).
 S 968-007-C00
 (6)  Replace the Ceramic Insulator
 (a)  
Remove the large snap ring at the bottom of the well in the ignition lead with forceps.

 (b)  
Remove the small snap ring on the contact of the ceramic insulator with needle nose pliers.

 (c)  
Remove the insulator.

 (d)  
Measure the Outside Diameter (OD) of the socket contact for a sign of arc damage. 1) If there is arc damage, replace the ignition lead

 (AMM 74-21-01/401).

 (e)  
Slide the new ceramic insulator over the socket contact.

 NOTE: The ceramic insulators for PRE SB 74-009 and POST
____ SB 74-009 are not interchangeable.
 (f)  
Install a small snap ring in the groove of the socket contact at the tip of the insulator.

 (g)  
Install a large snap ring at the bottom of the ignition lead with forceps.

 (h)  
Make a visual check to make sure you attach the snap ring in the groove.

 S 418-022-C00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU CLOSE THE
_______ THRUST REVERSER. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (7)
Close the right and left thrust reverser (AMM 78-31-00/201).

 (8)
Close the right and left fan cowl panel (AMM 71-11-02/201).

 S 418-023-C00
 TASK 74-21-01-308-008-C00
 3. Repair of the Type 4 Ignition Lead
__________________________________
 A. General
 (1) The available repair for the Type 4 ignition leads is as follows:
 (a)  Clean the eroded or pitted contacts on the ignition lead.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. TYPE 3 AND TYPE 4 IGNITION LEAD ú

 74-21-01
 ú ú C02 Page 808 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(2)  The ceramic insulators on the Type 4 ignition leads can be repaired by the applicable component repair procedure (CMM 74-21-12).
 B. Standard Tools and Equipment
 (1)  
3/8 inch Medium Grit Abrasive Impregnated Rubber Rod

 -Local Purchase or :
 Craytex Manufacturing Company
 7754 Arjohns Drive
 San Diego, CA 92126

 (2)  
Contact Polishing Tool (P/N11-10786-1)
 Unison Industries
　
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