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FIGURE 1
TURBINE COOLING AIR VALVE ACTUATOR INSTALLATION
3. For a leaking TCA actuator, in addition to steps 1 & 2 above, deactivate the TCA actuator per the following procedure:
A. Remove pressure side flex hose (Fig. 2).
 Remove flex hose 1B7651 and adapter 1A9407 by loosening connections at actuator and hard line tube assembly.
 Remove and discard associated packings MS9967-012 (two places) and MS 9966-07.
B. Remove return side flex hose (Fig. 2).
 
 Remove flex hose 1B7655 and adapter 1B5400 by loosening connections at actuator and hard line tube assembly.
 Remove and discard associated packings MS9966-011, MS9966-012, and MS9966-06.
C. Plug/cap vacated connections on pressure side (Fig. 3).
 Install plug MS9405-07 and new packing MS9966-07 into pressure port of actuator and torque to 150-170 lb-in.
 Install cap assembly 1B8493 and packing MS9967-012 to tube assembly 1B6679-01 and torque to 434-484 lb-in.
D. Plug/cap vacated connections on return side (Fig. 3).
 Install plug MS9405-06 and new packing MS9966-06 into return port of actuator and torque to 110-120 lb-in.
 Install cap assembly 1B8494 and packing MS9967-011 to tube assembly 1B6677-01 and torque to 434-484 lb-in.
FIGURE 2
 

 
1B7426
IGNITER CABLE
 

 
FIGURE 3
 
REPAIR INTERVAL C - NUMBER INSTALLED
ITEM   0 NUMBER REQUIRED FOR DISPATCH
    REMARKS OR EXCEPTIONS
(O) May be inoperative provided an alternate means of achieving desired values is available and used.
77-00-1 Target Parameter
Indications    

EICAS STATUS MESSAGES
None
PLACARD
As appropriate
OPERATIONS (O)
Observe that desired values are achieved. Only items indicated by arrows may be inoperative (may not appear on display). Refer to Runway Performance Software (Finscap) for Takeoff EPR Settings.
 

REPAIR INTERVAL C 2 NUMBER INSTALLED
ITEM   1 NUMBER REQUIRED FOR DISPATCH
    REMARKS OR EXCEPTIONS
(O) EICAS and/or STANDBY indications for one engine may be inoperative provided:
 Appropriate QRH limitations and performance decrements are applied,
 Fuel flow indications on associated engine operate normally, and
 Approach minimums do not require its use.
77-11-1 Engine Pressure Ratio
(EPR) Systems    

NOTE: The above EPR system relief includes the EPR on the SEI (Standby Engine Indicator). EICAS STATUS MESSAGES
None
PLACARD
Near EICAS - L or R EPR INOP
OPERATIONS (O)
Refer to QRH “Alternate Thrust Setting” section for limitations and performance adjustments.
　
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