(6)
32-42-02/401, Antiskid Modular Assembly
(7)
32-42-12/201, Autobrake Shuttle Valve Assembly
B. Single Hot Brake
S 282-002
(1)
Examine the brake for correct operation and condition (Ref 32-41-15/601).
(2)
Remove and the related anti-skid control valve (Ref 32-42-02/401).
S 722-012
(3)
Do a bench test of the anti-skid control valve.
S 712-003
(a) Make sure the brake is calibrated correctly.
C. Single Cold Brake
S 212-004
(1)
Do a check for a closed hydraulic fuse (Ref 32-41-00/201).
(2)
Remove the related anti-skid control valve (Ref 32-42-02/401).
S 712-005
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747-400 MAINTENANCE MANUAL
S 722-013
(3)
Do a bench test of the anti-skid control valve.
S 212-006
(4)
Do a check of the antiskid transducer for correct operation (Ref transducer spin test, 32-42-00/501).
S 712-007
(5)
Remove the brake control unit (Ref 32-42-01/401).
S 722-014
(6)
Do a bench test of the brake control unit.
S 282-008
(7)
Examine the brake for correct operation and condition
(Ref 32-41-15/601).
D. All Brakes on the Left or Right Side of the Airplane Hot or Cold
S 212-009
(1)
Do a check of the retraction braking actuators for correct operation (Ref 32-41-00/501).
S 712-010
(2)
Do a check of the brake metering valves for correct operation (Ref 32-41-00/501).
S 712-015
(3)
Make sure the brake metering valves are adjusted correctly
(Ref 32-41-00/501).
S 712-011
(4)
Do a check of the auto-brake shuttle valves for correct operation (Ref 32-42-12/201).
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747-400 MAINTENANCE MANUAL
CABIN OVERPRESSURIZATION CONDITION - MAINTENANCE PRACTICES
__________________________________________________________ (CONDITIONAL INSPECTION)
________________________
1. General_______
A. One task is supplied in this procedure. The task is spare air data unit conditional inspection.
B. This task examines system and components which can be damaged due to overpressurization.
TASK 05-51-27-202-001
2. Standby indicator Conditional Inspection____________________________________________
A. References
(1)
34-13-01/401, Standby Altitude Indicator
(2)
34-13-02/401, Standby Airspeed Indicator
B. If cabin overpressurization occurs (18 psia for air data units), Do these steps:
S 722-002
(1)
Do a check of all the standby indicators in the airplane (Ref 34-13-01/401 and 34-13-02/401).
S 722-003
(2)
Do a check of all the air data units with disconnected pitot static lines (Ref 34-13-01/401 and 34-13-02/401).
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747-400 MAINTENANCE MANUAL
NACELLE/STRUT PRESSURE RELIEF DOORS OPEN CONDITION -
____________________________________________________ MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
______________________________________________
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