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MAINTENANCE MANUAL
CAUTION:_______ MAKE SURE ALL SURFACES AND TOOLS THAT TOUCH THE SEALANT
ARE CLEAN. OBJECTS THAT ARE NOT CLEAN CAN CAUSE
CONTAMINATION TO THE SEALANT. CONTAMINATION CAN CAUSE THE
SEALANT TO BOND UNSATISFACTORILY.
(c)
If the surface with primer becomes dirty, clean the surface again and apply primer again.
(d)
Apply masking tape adjacent to the slots and recesses you will seal.
(e)
Apply sealant with a sealing gun.
NOTE: If you cannot get access to an area with the sealing
____ gun, use a paper cone or spatula.
1) To push sealant into slots and recesses, push out a bead of sealant in front of the nozzle of the sealing gun. a) Make sure the slots and recesses are fully filled and
no air is caught below the sealant.
(f)
Use a scraping tool that is not metal to make the sealant level with the masking tape.
(g)
Remove the masking tape while the sealant is wet.
(h)
To make the sealant smooth with the surface, rub the sealant with a clean cloth that is moist with one of the specified solvents.
S 842-032
(9)
Do the Slat Drive System Activation procedure (Ref 27-81-00).
(10)
Do the Thrust Reverser Activation procedure (Ref 78-31-00).
S 842-033
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757 MAINTENANCE MANUAL
ENGINE INLET THERMAL ANTI-ICING -
_________________________________ DESCRIPTION AND OPERATION
_________________________
1. General_______
A. The engine inlet cowls are anti-iced by engine bleed air. System components include engine inlet thermal anti-ice (TAI) valves, engine inlet TAI low and high pressure switches, engine inlet TAI ducts, and a wing and engine anti-ice control panel. System electrical power comes from the 28v dc battery bus, through circuit breakers on the overhead circuit breaker panel, P11.
B. Engine anti-ice maintenance operation should be limited to bleed duct temperature of 450 degree F maximum for less than 5 munites duration.
2. Component Details (Fig. 1)_________________
A. Engine Inlet Thermal Anti-Ice (TAI) Valves
(1)
The engine inlet TAI valve controls the flow of engine bleed air to the engine inlet TAI duct. One valve is located in the left side of each engine, aft of the pressure blow-out door. The valve is set to keep duct pressure between 24-28 psi.
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