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757
MAINTENANCE MANUAL

WING AND ENGINE ANTI-ICE CONTROL PANEL

FLIGHT COMPARTMENT

WING ANTI-ICE

WING AND ENGINE ANTI-ICE CONTROL PANEL

Engine Inlet TAI Component Location
Figure 1 (Sheet 2)

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MAINTENANCE MANUAL

 (a)  
The manual override procedure is almost the same for engines with this valve position switch. The switch is removed and turned through 180 degrees in the same step as before, together with the manual override assembly and engraved locking plate. As an added final step, the valve position switch is installed on top of the engraved plate with its lever pointed up.

 (b)  
A cap and stow provision is also installed for the related electrical connector that connects to the valve position switch. This permits you to install an older configuration of the engine TAI valve (without the valve position switch) on the newer configuration engine. You can also install the newer configuration of the engine TAI valve (with the valve position switch) on an older configuration engine. If this occurs, the reliability for the VALVE disagree light will not be increased.

 (6)  When it is necessary to manually position the valve, do the procedure that follows:
 (a)  
RB211-535E4 SERIES ENGINES WITHOUT THE TAI VALVE POSITION SWITCH; Remove the six bolts that attach the manual override assembly to the valve body. Remove the manual override assembly together with its locking plate and related gaskets from the locator dowels.

 (b)  
RB211-535E4 SERIES ENGINES WITH THE TAI VALVE POSITION SWITCH; Remove the six bolts that attach the manual override assembly and position indicator assembly to the valve body. Remove the manual override assembly and the valve position indicator assembly together with the locking plate and related gaskets.

 CAUTION: WHEN YOU MANUALLY POSITION THE VALVE, MAKE SURE THE TONGUE
_______ OF THE JACKSCREW ENGAGES WITH THE SLOT IN THE VALVE HEAD AND THE SLOT IN THE LOCKING PLATE. WHEN YOU INSTALL THE LOCKING PLATE, IT MUST BE FULLY DOWN ON THE VALVE ASSEMBLY AND NOT REQUIRE "PULLING DOWN" WITH THE RETAINING BOLTS. FAILURE TO COMPLY CAN RESULT IN DAMAGE TO THE VALVE.
　
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