5A2 Distressed Ignition Lead Crommets
May 15/81 Figure 601 74-00
Page 603
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Electrical Arcing Condition 5A2
74-00 Figure 602 May 15/81
Page 604
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
5A2 Electrical Flashover Condition
May 15/81 Figure 603 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 74-00 Page 605
Igniter Plug Abrasion Wear Limits 501
74-00 Figure 605 Oct 20/83
Page 606
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
IGNITION - CLEANING/PAINTING
1. General
A. Ignition system cleaning encompasses the igniter plug, high tension leads and ignition exciter.
2. Clean Igniter Plug
A. Outer Shell
WARNING: USE CLEANING SOLVENT IN WELL VENTILATED AREA, AVOID CONTACT WITH SKIN.
WARNING: IGNITER PLUG MAY CONTAIN RESIDUE OF KRYTOX 240 AC GREASE. DO NOT CONTAMINATE SMOKING MATERIALS (CIGARETTES, CIGARS, ETC.) WITH KRYTOX 240 AC GREASE. COMBUSTION PRODUCTS OF KRYTOX 240 AC GREASE COULD BE HARMFUL IF INHALED. AVOID SKIN CONTACT. WASH HANDS IMMEDIATELY AFTER CONTACT WITH KRYTOX 240 AC GREASE. THIS GREASE IS NO LONGER USED ON THE IGNITION CABLES.
NOTE: Cleaning solvent shall be acetone.
NOTE: Cleaning of recessed center electrode cavity on firing end of igniter plug is not recommended.
(1)
Degrease igniter plug in cleaning solvent.
(2)
Clean outer shell of igniter plug using wire brush.
(3)
Using cleaning solvent and nonmetallic brush, remove deposits from external surface of firing end of igniter plug. It is not necessary to restore ceramic to cleanness of new ceramic surface.
B. Contact Well
NOTE: Compressed air shall be maintained at 30 psig maximum discharge pressure.
NOTE: Dirt on contact surface will cause reduced output or arcing.
(1) Remove dirt or foreign matter from inside contact well with compressed air.
WARNING: USE CLEANING SOLVENT IN WELL VENTILATED AREA, AVOID CONTACT WITH SKIN.
NOTE: Cleaning solvent shall be acetone.
(2)
Clean igniter plug contact well with long bristle, nonmetallic brush moistened with cleaning solvent. Dry with compressed air.
(3)
Clean inner ceramic walls using circular felt bob, 1/2 inch in diameter and approximately 1-3/4 inches long, suitable for use with hand chuck. Moisten with cleaning solvent and clean using circular movement of hand.
(4)
Clean end surface of ceramic at seat of grommet face using short bristle nonmetallic brush moistened with cleaning solvent. Dry with compressed air.
500
May 01/98 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 74-00 Page 701
3. Clean High Tension Leads
WARNING: IGNITION CABLE RUBBER BUSHINGS AND ADJACENT PARTS MAY CONTAIN RESIDUE OF KRYTOX 240 AC GREASE. DO NOT CONTAMINATE SMOKING MATERIALS (CIGARETTES, CIGARS, ETC.) WITH KRYTOX 240 AC GREASE. COMBUSTION PRODUCTS OF KRYTOX 240 AC GREASE COULD BE HARMFUL IF INHALED. AVOID SKIN CONTACT. WASH HANDS IMMEDIATELY AFTER CONTACT WITH KRYTOX 240 AC GREASE. THIS GREASE IS NO LONGER USED ON THE IGNITION CABLES.
NOTE: Compressed air shall be maintained at 30 psig maximum discharge pressure.
A. Remove dirt or foreign matter from area inside spring with compressed air.
WARNING: USE CLEANING SOLVENT IN WELL VENTILATED AREA. AVOID CONTACT WITH SKIN.
NOTE: Cleaning solvent shall be acetone.
B. Wipe ceramic insulator clean using clean lint free cloth moistened with cleaning solvent. Dry with compressed air.
C. Wipe conduit assembly with clean lint free cloth moistened with cleaning solvent. Dry with compressed air.
D. Clean high tension contact as required with clean lint free cloth moistened with cleaning solvent. Dry with compressed air.
4. Clean Ignition Exciter
NOTE: Compressed air shall be maintained at 30 psig maximum discharge pressure.
NOTE: Dirt on contact surface will cause reduced output or arcing.
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74-00 Page 702 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/98
A. Remove dirt or foreign matter from inside contact well with compressed air.
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