747-400 AMM 飞机维护手册 导航 NAVIGATION 1(164)

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 2.  Remove The Inertial Reference Unit__________________________________
 A.  References
 (1)  
AMM 06-09-01/201, Body Section 41 Access Doors and Panels

 (2)  
AMM 20-11-22/401, Rack Mounted Electrical/Electronic Modules

 B.  Access
 (1)  
Location Zone
 117 Electrical and Electronics Compartment

 (2)  
Access Panels
 117AL Electronics Compartment Access Door

 

 C.  Procedure
 S 864-002
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Main Power Distribution Panel
 1) 6D7 IRS AC LEFT
 2) 6D8 IRS AC CENTER
 3) 6D9 IRS AC RIGHT
 4) 6E7 IRS DC LEFT
 5) 6E8 IRS DC CENTER
 6) 6E9 IRS DC RIGHT
 7) 6E32 C IRS DISCONNECT

 S 014-024

　
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