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 CAUTION: DO NOT CAUSE DAMAGE TO OR REMOVE THE SEAL AT THE
_______ HIGHER AND LOWER SURFACES OF THE STRUT FAIRING.
 a)  Remove the 15 screws that attach the strut fairing half
 at the six o'clock position. b) Remove the fairing from the engine. c) Remove the right fairing half to get access to the VSV
 actuator drain on the right side. d) Remove the left fairing half to get access to the VSV
 actuator drain on the left side. e) Find the source of the leakage. f) Make sure that you tighten the tube nut to the correct
 torque value. g) Make sure that there is no damage to the tube. h) Tighten, repair or replace the tube if it is necessary. i) Do a leakage check again.
 (g)  Install and seal the strut fairing half, as follows:
 NOTE: BMS5-63 primer and sealant is necessary to give
____ sufficient fire protection for the extension ring and fairing. Sealant 93-006-1 is necessary to fill the crack between the fairing and the support structure for aerodynamic smoothness.
 1) Remove the used sealant from the fairing and the mating surfaces on the extension ring and fan frame strut.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-31-01
 ALL  ú ú C01 Page 415 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
WARNING:_______ DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUTH OR
 EYES, OR ON YOUR SKIN.  DO NOT BREATHE THE FUMES FROM
 MEK.  PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES
 WHEN YOU USE MEK.  KEEP MEK AWAY FROM SPARKS, FLAME
 AND HEAT.  MEK IS A POISONOUS AND FLAMMABLE SOLVENT
 WHICH CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO
 EQUIPMENT.
 2)  Use solvent to clean the mating surfaces of the extension
 ring and the strut fairing assembly.  Rub the surfaces dry.
 3)  Apply the parting agent to the mating surfaces of the
 extension ring.
 a)  Let the parting agent cure until it is dry to the
 touch.
 ú  4)  Apply the BMS5-63, Type 1 or 2, Class B-4 primer and
 ú  sealant, as follows:
 a)  Apply the BMS5-63 primer as a continuous coat to the
 mating surfaces of the extension ring.
 1_ Let the primer cure for a minimum of 30 minutes.
 NOTE:____ The primer will form a chalky surface when
 dry.
 b)  Apply the BMS5-63 sealant to the faying surface of the
 strut fairing.
 5)  Install the strut fairing half.  Use 0.025 inch x 0.375
 inch (0.64 mm x 9.53 mm) spacers or washers at each
 fastener location to keep the correct sealant thickness.
 Do not fully install the fasteners.
 ú  6)  Let the BMS5-63, Type 1 sealant cure at room temperature
 ú  for 48 hours.
 ú
 ú  NOTE:____ If you use the BMS5-63, Type 2 sealant, let the
 ú  sealant cure at room temperature for four hours.
 ú
 ú  a)  If a shorter cure time is necessary for the Type 1
 ú  sealant, cure the sealant at 120° |5° Farenheit (50° C)
 ú  for four hours.
 7)  After the sealant has cured, do a visual check to make sure
 the sealant fully covers the faying surfaces.
 8)  Remove the spacers and fully torque the strut fairing
 fasteners.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 75-31-01
 ALL  ú ú C01.1 Page 416 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
WARNING: DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUTH OR
_______ EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM MEK. PUT ON A PROTECTIVE SPLASH GOGGLE AND GLOVES WHEN YOU USE MEK. KEEP MEK AWAY FROM SPARKS, FLAME AND HEAT. MEK IS A POISONOUS AND FLAMMABLE SOLVENT WHICH CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
　
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