32-44-00
 ALL  ú ú 05 Page 521 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 CAUTION:_______ DO NOT TIGHTEN THE ADAPTER FITTING FOR THE BRAKE BLEEDER
 MORE THAN 90-110 POUND-INCHES.  IF YOU TIGHTEN THE FITTING
 MORE THAN 110 POUND-INCHES, DAMAGE TO THE FITTING OR BRAKE

 ASSEMBLY CAN OCCUR.
 (a)  Tighten the adapter fitting for the brake bleeder to 90-110 pound-inches.
 NOTE: The specified torque values are for the installation of
____ the bleeder adapter fitting in the brake assembly. The maximum torque value for the brake bleeder valve (which you do not operate in this procedure) is 45 pound-inches.
 S 865-080
 (5)  
Pressurize hydraulic system 4 (AMM 29-11-00/201).

 S 865-081

 (6)  
Set the parking brake.

 S 095-082
 WARNING: REFER TO THE SPECIFIED PROCEDURE WHEN YOU REMOVE THE DOOR LOCKS
_______ FROM THE LANDING GEAR DOORS. THE DOORS CAN CLOSE QUICKLY IF THERE IS PRESSURE IN THE SYSTEM. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO THE EQUIPMENT.
 (7)  
Remove the door locks from the landing gear (AMM 32-00-30/201).

 S 865-083

 (8)  
Remove all hydraulic power if it is not necessary (AMM 29-11-00/201).

 (9)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 S 865-084
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 32-44-00
 ALL  ú ú 02 Page 522 ú Feb 15/99
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A
747-400 MAINTENANCE MANUAL
 PARKING BRAKE SYSTEM - INSPECTION/CHECK
_______________________________________
 1.  General_______
 A.  This procedure contains the visual inspection of the parking brake mechanical control path for condition and security.
 B.  To do the visual inspection of the parking brake mechanical controls, you must do these steps:
 -
Remove the applicable ceiling panels in the forward passenger cabin

 -
Remove the side panel from the control stand

 -Inspect the parking brake control path
 -
Install the ceiling panels in the forward passenger cabin

 -
Install the side panel on the control stand.

 TASK 32-44-00-206-001
 2.  Examine Brake Control Path For Wear___________________________________
 A.  References
 (1)  
25-22-01/401, Main Passenger Cabin Ceiling Panels

 (2)  
76-11-03/201, Control Stand

 (3)  
IPC 32-44-60 Fig. 1

 B.  
Access

 (1)  
Location Zone
 211 Passenger Cabin - Nose to First Door, LH
 221 Control Cabin, LH

 C.  
Prepare for Inspection

 S 016-004
 (1)  
Remove the fourth-center-ceiling panel in the passenger compartment forward of the No. 1 door (Ref 25-22-01/401).

 S 016-005

 (2)  
Remove the left side panel from the control stand
 (Ref 76-11-03/201).

 D.  
Examine Parking Brake Control Path Parking Brake System

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

 (a)  
Parking brake lever and rod

 (b)  
Counter shaft assembly

 (c)  
Push rod, torque tube assembly and pawl

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 32-44-00
 ALL  ú ú 01 Page 601 ú Feb 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

747-400
MAINTENANCE MANUAL

EICAS
SEE A
DECAL CONTROL STAND SEE B
CONTROL STAND PARKING BRAKE
A
LEVER
B
Parking Brake System Control Path InspectionFigure 601 (Sheet 1)
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