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(d) Stir slowly until you get a homogeneous mixture.
S 398-027
WARNING: DO NOT BREATHE THE FUMES FROM THE SECONDARY FUEL BARRIER
_______ SEALANT (BMS 5-81, TYPE II). KEEP THE SEALANT AWAY FROM SPARKS, FLAME OR HEAT. THE SEALANT IS POISONOUS AND FLAMMABLE AND CAN CAUSE INJURY OR DAMAGE.
CAUTION: DO NOT APPLY THE SECONDARY FUEL BARRIER SEALANT (BMS 5-81,
_______ TYPE II), IF THE AIR TEMPERATURE IS LESS THAN 60°F (15°C) OR THE RELATIVE HUMIDITY IS MORE THAN 95 PERCENT. THE SEALANT WILL NOT CURE CORRECTLY IF THE TEMPERATURE AND RELATIVE HUMIDITY CONDITIONS ARE NOT IN THE LIMITS.
(8)
Apply BMS 10-11 Type I primer, before you apply BMS 5-81 Type II to make areas smooth that have sharp edges (recommended).
S 398-074
(9)
Apply two layers of BMS 5-81, Type II sealant with a flat, bristle brush.
(a)
Make sure the total thickness of the two layers of applied sealant is 0.005 to 0.010 inch (5-10 mils).
NOTE:____ In some locations, it can be necessary to apply
sealant with a thickness of more than 0.010 inch. This
can be necessary to make sure the sealant has the
minimum thickness of 0.005 inch or more in all
locations. This condition is permitted, but the
thickness of the sealant is not to be more than 0.020 inch.
(b)
For horizontal surfaces, let the sealant dry a minimum of 1/2 hour between layers.
(c)
For vertical surfaces, let the sealant dry a minimum of 2 hours between layers.
S 398-028
(10)
Cure the sealant.
(a)
The cure rates of the sealant are as follows:
NOTE: A cure temperature of more than 80°F (26.7°C) is
____ recommended for the best results.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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757
MAINTENANCE MANUAL
~.............................................................................. | TABLE I BMS 5-81 CURE RATES | ................................................................................ | | CURE CONDITIONS | | ................................................................. | | DRY HARD (HOURS) *[1] | DRY THROUGH (HOURS) *[2] | | ................................................................. | CURE | TYPE II, | TYPE II, | TYPE II, | TYPE II, | | TEMPERATURE | CLASS 1 | CLASS 2 | CLASS 1 | CLASS 2 | ................................................................................ | 75 |5°F | 50 | 8 | 96 | 24 | ................................................................................ | 100 |5°F | 18 | 2.5 | 36 | 3.5 | ................................................................................ | 125 |5°F | 7.5 | 1.5 | 15 | 2.5 | ................................................................................ | 150 |5°F | 2.5 | 1.5 | 5 | 2 | 2..............…...............…...............…...............…...............1 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：757 AMM 飞机维护手册 燃油 CHAPTER 28 - FUEL 1(141)
