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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ú (c) Apply the parting agent to the mating surfaces of the extension
ú ring.
ú 1) Let the parting agent cure until it is dry to the touch.
ú (d) Apply the BMS5-63 primer and sealant as follows:
ú 1) Apply the BMS5-63 primer as a continuous coat to the mating
ú surfaces of the extension ring.
ú a) Let the primer cure for a minimum of 30 minutes.
ú
ú
NOTE:____ The primer will form a chalky surface when dry.
ú
ú 2) Apply the BMS5-63 sealant to the faying surface of the
ú strut fairing.
(e) Install the strut fairing with 26 screws.
ú 1) Use 0.025 inch x 0.375 inch (0.64 mm x 9.53 mm) spacers or
ú washers at each fastener location to keep the correct
ú sealant thickness.
ú 2) Do not fully install the fasteners.
ú (f) Let the BMS5-63, Type 1 sealant cure at room temperature for 48
ú hours.
ú
ú
NOTE:____ If you use the Type 2 sealant, let the sealant cure at
ú room temperature for four hours.
ú
ú 1) If a shorter cure time is necessary for the Type 1 sealant,
ú cure the sealant at 120 +/-5 degrees F for four hours.
ú (g) After the sealant has cured, do a visual check to make sure the
ú sealant fully covers the faying surfaces.
ú (h) Remove the spacers or washers and fully torque the strut
ú fairing fasteners.
ú
ú
WARNING:_______ DO NOT GET METHYL ETHYL KETONE (MEK) IN YOUR MOUTH, OR
ú EYES, OR ON YOUR SKIN. DO NOT BREATHE THE FUMES FROM THE
ú MEK. PUT ON A RESPIRATOR, PROTECTIVE SPLASH GOGGLES, AND
ú GLOVES WHEN YOU USE THE MEK. KEEP THE MEK AWAY FROM
ú SPARKS, FLAME AND HEAT. MEK IS A POISONOUS AND FLAMMABLE
ú SOLVENT WHICH CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO
ú EQUIPMENT.
ú
ú (i) Make sure the area between the strut fairing and the extension
ú ring is clean.
ú 1) If necessary, clean the surface with solvent and rub the
ú surface dry.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
75-32-02
ALL ú ú C01.1 Page 415 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ú ú (j) (k) If the temperature of the sealing surfaces is below 50°F (10°C), flow warm air (not more than 120°F [50°C]) along the structure to make the surfaces warm.Use a brush or spray to apply 1200 red primer in the areabetween the strut fairing and the extension ring.
NOTE:____ Permit a minimum of one hour for the primer to dry before you apply the sealant.
ú ú ú (l) (m) (n) Apply the DC 93-006-1 (aerodynamic) sealant to the area betweenthe strut fairing and the extension ring as shown in Fig. 401 (View A).Rub the sealant to get a smooth finish.Let the sealant cure for ten hours.
ú ú ú ú NOTE:____ A ten hour cure time is for usual conditions of 77 |2°F (25 |1°C) and 50 |5% relative humidity. The cure time can be made faster if you flow warm air (not more than 120°F [50°C]) along the sealant. You can also make the sealing surfaces warm before you apply the sealant.Airplane operation is permitted after a cure time offour hours.
S 724-027-C00 (19) Do a check of the static rigging of the VBV feedback cable (AMM 75-32-05/501).
S 414-041-C00
WARNING:_______ OBEY THE INSTRUCTIONS IN THE PROCEDURE TO CLOSE THE THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS WHEN YOU CLOSE THE THRUST REVERSERS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
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