C.
Prepare for Inspection
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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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