747-400 AMM 飞机维护手册 导航 NAVIGATION 2(157)

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 NOTE:____ The air pressure must be between 25 and 38 psi.
 (3)  S 417-003Do this task to install the R/T mount filter: Installation" (AMM 34-43-08/401). "R/T Mount Filter

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747-400 MAINTENANCE MANUAL
 WEATHER RADAR ANTENNA MOUNT - MAINTENANCE PRACTICES
___________________________________________________
 1.  General_______
 A. This subject has three tasks:
 (1)  
Weather Radar Antenna Mount Removal

 (2)  
Weather Radar Antenna Mount Installation

 (3)  
Weather Radar Antenna Mount Adjustment.

 TASK 34-43-09-002-001
 2.  Weather Radar Antenna Mount Removal (Fig. 201)___________________________________
 A. General
 (1)  Do not remove the weather radar (WXR) antenna mount unless the approved tools are available to do the antenna mount alignment.
 B. References
 (1)  
AMM 34-43-03/401, Weather Radar Antenna

 (2)  
AMM 53-52-01/201, Nose Radome

 (3)  
IPC 34-43-03, Fig. 1

 C. Access
 (1)  Location Zone
 111 Radome

 D. Procedure
 S 862-002
 (1)
Open these circuit breaker and attach DO-NOT-CLOSE tags:

 (a)  P7 Overhead Circuit Breaker Panel 1) 7C7, WXR L RT 2) 7C19, WXR R RT

 (2)  
Open the nose radome (AMM 53-52-01/201).

 (3)  
Remove the WXR antenna (AMM 34-43-03/401).

 S 012-003
 S 012-004
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747-400 MAINTENANCE MANUAL
 S 022-005
 (4)  Remove the WXR antenna mount:
 (a)  
Remove the four pitch adjustment bolts, nuts and washers that hold the WXR antenna mount to the airplane support structure.

 (b)  
Remove the two pitch pivot bolts, nuts and washers that hold the WXR antenna mount to the airplane support structure.

 (c)  
Remove the WXR antenna mount from the airplane support structure.

 (d)  
Keep the bolts, nuts and washers for installation of the WXR antenna mount.

 TASK 34-43-09-002-006
 3.  Weather Radar Antenna Mount Installation (Fig. 201)________________________________________
 A. Reference
 (1)  
AMM 34-43-03/401, Weather Radar Antenna

 (2)  
AMM 53-52-01/201, Nose Radome

 (3)  
IPC 34-43-03, Fig. 1

 B. Access
 (1)  Location Zone
 111 Radome

 C. Procedure
 S 862-006
 (1)
Open these circuit breaker and attach DO-NOT-CLOSE tags:

 (a)  P7 Overhead Circuit Breaker Panel
 1) 7C7, WXR L RT
 2) 7C19, WXR R RT

 (2)
Open the nose radome (AMM 53-52-01/201) if it is necessary.

 S 212-013

 (3)  
Examine the mount and support assemblies of the WXR antenna mount for cracks or damage.

 S 012-008
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747-400 MAINTENANCE MANUAL
REFERENCE TRANFER LOCATION LBL TRANSFER
SEE  C  D 
ANTENNA MOUNT 
FLOOR MAIN DECK  SEE  B 
STA 1480.00 
STA 1460.00 

29.50
PLATE
SEEE F
RADOME
SEE A
ROLL ADJUSTMENT BOLTS (QTY 5)
PITCH ADJUSTMENT BOLTS NUTS WASHERS (QTY 4)
　
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