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757
MAINTENANCE MANUAL
(b) Remove the bad sealant with cutting tools and scrapers.
S 158-090
CAUTION: MAKE SURE THE PRIMER IS REMOVED IF IT IS NOT HEAT CURED (BAKED
_______ ON) BMS 10-20. THE SEALANT WILL NOT STAY IN PLACE IF THE PRIMER IS NOT HEAT CURED. THIS CAN CAUSE FUEL LEAKAGE.
(5) If the surface has a finish layer (topcoat), remove all of the finish from the sealant repair area.
NOTE: This is not necessary if the finish is heat-cured
____ (baked-on) BMS 10-20 Type II finish material (as it is applied to a new airplane in the factory).
The area in the fuel tank that is not heat-cured extends from
___ approximately three inches above the bottom of the fuel tank on the front spar, along the bottom of the fuel tank, to approximately three inches above the bottom of the fuel tank on the rear spar.
(a) Use abrasive paper and remove the used topcoat until either bare metal or sealant (in good condition) is shown.
SCARF EDGE
(EQUIVALENT ON EACH END)
Fillet Seal Removal
Figure 803
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28-11-00
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757
MAINTENANCE MANUAL
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON
_______ YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(b)
Use clean gauze pads soaked with solvent, Series 93 (AMM 20-30-93/201) to clean all surfaces, also sealant, from which you removed topcoat.
(c)
Rub dry with a clean gauze pad.
(d)
Continue to clean and dry the surfaces until the dry gauze pad remains clean.
S 158-036
(6) Remove all used sealant precoat from the repair area unless it is known that precoat is BMS 5-26, Type II material in good condition.
WARNING: DO NOT GET SOLVENTS IN YOUR MOUTH, OR YOUR EYES, OR ON
_______ YOUR SKIN. DO NOT BREATHE THE FUMES FROM SOLVENTS. SOLVENTS ARE HAZARDOUS MATERIALS. REFER TO PRODUCT MATERIAL SAFETY DATA SHEETS (MSDS) AND LOCAL REQUIREMENTS FOR PROPER HANDLING PROCEDURES.
(a)
Remove the used precoat with an abrasive pad and solvent, Series 93 (AMM 20-30-93/201).
(b)
Clean the surface with a clean brush and gauze pads soaked with the solvent.
NOTE: The area you clean should make an overlap with the
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