70-40-01
ALL ú ú C02.1 Page 203 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ú D. Procedure
ú
ú
NOTE: You must clean the part before you start the inspection process.____
ú Plug or cap tubes and holes in the area to be inspected to prevent
ú inspection materials from being entrapped.
ú
ú
ú S 232-030-C00
ú (1) Application of Penetrant
ú
ú
WARNING: PENETRANT IS FLAMMABLE. THE FLASH POINT OF PENETRANT IS_______
ú CONSIDERABLY LOWERED WHEN USED AS A FINE SPRAY. TAKE
ú PRECAUTIONS AGAINST FIRE. IF YOU DO NOT OBEY THESE
ú INSTRUCTIONS, INJURY TO PERSONS CAN OCCUR.
ú
ú (a) Apply penetrant by spraying or brushing.
ú (b) Allow 20 to 60 minutes for penetration.
ú
ú S 232-032-C00
ú (2) Removal of Excess Penetrant (Preferred)
(a) Remove excess penetrant with a hydrophilic remover provided it
belongs to the same family as the penetrant used.
1) Do not exceed 90 seconds contact time.
ú (b) If hydrophilic remover is applied manually, do not scrub the
ú surface of the part with the applicator.
ú (c) Use applicator only to deliver fluid to the part surface.
ú (d) Spray rinse the part with water from a squeeze bottle or spray
ú gun.
ú 1) As an alternate, you can wipe the part with a clean dry
ú cloth or clean cloth dampened with water.
ú a) Removal of excess penetrant done by wiping can remove
ú the penetrant indication if excessive amount of solvent
ú is applied.
ú b) Be careful not to affect the sensitivity of the FPI.
ú
ú S 232-031-C00
ú (3) Removal of Excess Penetrant (Recommended)
ú (a) Wipe the excess penetrant with a clean dry cloth.
ú
ú
WARNING: CLEANING SOLVENTS ARE FLAMMABLE, VOLATILE, AND TOXIC._______
ú THEY SHOULD BE USED WITH ADEQUATE VENTILATION. AVOID
ú PROLONGED BREATHING OF VAPORS AND REPEATED OR PROLONGED
ú CONTACT WITH THE SKIN, OR CLOTHING.
ú
ú (b) Remove background fluorescence by wiping with a clean cloth
ú dampened with solvent.
ú (c) Look at the part under ultraviolet light to make sure excess
ú penetrant has been removed.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
70-40-01
ALL ú ú C02.1 Page 204 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ú (d) If excessive background fluorescence continues, apply solvent
ú as a fine mist while you look under the ultraviolet light.
ú 1) Point the spray at an angle and spray over the area only
ú once.
ú
ú
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