(2) Continue to polish the igniter contact until the burns and pits are removed.

 Subtask 74-21-20-220-051
 B. Measure the dimension between the contact face and the retaining ring groove. Replace the ignition lead if this dimension is less than 0.055 in. (1.397 mm) thick.
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 Repair Igniter Contact
 Figure 801/TASK 74-21-20-991-303

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 Subtask 74-21-20-160-053

 C. Clean the ceramic insulator sleeve and contact with a lint-free cloth R that is moist with trichloroethylene (Material No. CP1008) or stoddard R solvent (Material No. CP2011) or acetone (Material No. CP1039) or ardrox R 552 (Material No. CP2559) or turco ind 79 (Material No. CP2560) or mag-R chem teksol (Material No. CP2566) or degreasol 99 R (Material No. CP2584) R or mag-chem skysol (Material No. CP2656) .
 5. Close-up
________
 Subtask 74-21-20-420-055
 A. Install the ignition lead (Ref. TASK 74-21-20-400-002).
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 TASK 74-21-20-300-005 Replacement of the Ceramic Insulator Sleeve
 1. Reason for the Job

__________________
 Self Explanatory

 2. Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific lint-free cloth
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No.  CP1008 
R R  Material No. Material No.  CP1039 CP2011 
R R R R R R R R R R  Material No. Material No. Material No. Material No. Material No.  CP2559 CP2560 CP2566 CP2584 CP2656 

*
 trichloroethylene (Ref. 70-30-00)
*
acetone (Ref. 70-30-00)
*
 stoddard solvent (Ref. 70-30-00)
*
ardrox 552 (Ref. 70-30-00)
*
turco ind 79 (Ref. 70-30-00)
*
mag-chem teksol (Ref. 70-30-00)
*
degreasol 99 R (Ref. 70-30-00)
*
mag-chem skysol (Ref. 70-30-00)

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 C. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
10 white chamfered silicone seal 74-21-20 01 -180 10 white chamfered silicone seal 74-21-20 01 -180A 10 white chamfered silicone seal 74-21-20 01A-180 20 retaining ring 74-21-20 01 -200 20 retaining ring 74-21-20 01A-200 30 caged spring assembly 74-21-20 01 -190 30 caged spring assembly 74-21-20 01 -190A 30 caged spring assembly 74-21-20 01A-190 40 ceramic insulator sleeve 74-21-20 01 -210 40 ceramic insulator sleeve 74-21-20 01 -210A 40 ceramic insulator sleeve 74-21-20 01A-210
 D. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
74-21-20-000-002 Removal of the Left Ignition Lead 74-21-20-400-002 Installation of the Left Ignition Lead 74-21-20-991-304 Fig. 802
 3. Job Set-up
__________
 Subtask 74-21-20-020-056
 A. Remove the ignition lead (Ref. TASK 74-21-20-000-002).
 4. Procedure
_________
 (Ref. Fig. 802/TASK 74-21-20-991-304)
 Subtask 74-21-20-350-055
 A. Disassemble the Ignition Lead
 PRE SB 74-002
 (1) Remove and discard the white chamfered silicone seal (10).

 (2) Remove the caged spring assembly (30).

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 Replacement of the Ceramic Insulator Sleeve Figure 802/TASK 74-21-20-991-304
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