C.  
Prepare for Inspection

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A
747-400 MAINTENANCE MANUAL
 S 866-002
 WARNING:_______THE FLIGHT COMPARTMENT SEAT MUST BE DEACTIVATED. FAILURE TO DEACTIVATE THE SEAT MAY RESULT IN INADVERTENT FLIGHT COMPARTMENT SEAT OPERATION WHICH MAY INJURE PERSONNEL AND/OR DAMAGE EQUIPMENT.
 (1)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P414, Power Distribution Center - Left Panel
 1) 414D8, CAPT PWR SEAT

 (b)  
P415, Power Distribution Center - Right Panel 1) 415H32, F/O PWR SEAT

 S 016-004
 (2)  
Remove the passenger cabin ceiling panels that follow
 (AMM 25-22-01/401):

 (a)  
Ceiling panels forward of the first door

 (b)  
Left and right hand ceiling panels between the first and second doors

 (c)  
Left and right hand ceiling panels between the second and third doors

 (d)  
First left and right hand ceiling panels just aft of the third doors.

 S 016-005
 (3)  
Remove the left and right hand sidewall lining doorway panels just aft of the third doors (AMM 25-21-03/401).

 D.
Examine Brake Control Path Parking Brake System

 S 216-006
 (1)  
Do a careful visual inspection of the brake control path, brake rods, and cranks as follows for condition and wear (Fig. 601):

 (a)  
Brake pedals

 (b)  
Bellcranks, pushrods, bus rods

 (c)  
Brake control quadrants and brake pedal bus crank assemblies.

 S 216-007
 (2)  Do a careful visual inspection of the pulleys and cables that follow for corrosion, condition, and wear (AMM 20-21-03/601):
 -LGB1A-1 through -3
 -LGB1B-1 through -3
 -LGB2A-1 through -3
 -LGB2B-1 through -3
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747-400 MAINTENANCE MANUAL 
SEE  C 
CABLE LGB2A-2  CABLE LGB2B-2  SEE  B  SEE  D
SEE  A  CABLE LGB1B-2 CABLE LGB1A-2 

BRAKE PEDALS FIRST OFFICER'S  LEVER PARKING BRAKE 
CABLE LGB2B-1  PEDALS BRAKE CAPTAIN'S 

BRAKE CONTROL 
QUADRANT 
PUSHROD 
LGB2A-1 
CABLE 
BUS RODS 
LGB1A-1 
CABLE 
BRAKE CONTROL 
QUADRANT  LGB1B-1 
CABLE 
A 
Landing Gear Brake System Control Path Inspection 
Figure 601 (Sheet 1) 

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747-400 MAINTENANCE MANUAL 
LGB1A-3 CABLE  CABLE LGB1B-3 
LEFT BRAKE METERING VALVE CONTROL QUADRANT 
LEFT BRAKE METERING VALVE OUTBD  LGB2A-3 LGB2B-3 CABLE CABLE RIGHT BRAKE CONTROL QUADRANT METERING VALVE 
FWD  B 

RIGHT BRAKE
FWD OUTBD METERING VALVE
C
Landing Gear Brake System Control Path Inspection Figure 601 (Sheet 2)
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