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Placard flight log - ANTISKID INOP.
Open and collar the four antiskid circuit breakers (ANTISKID 1-5, ANTISKID 2-6, ANTISKID 3-7 and ANTISKID 4-8 (P11 panel).
C. Select AUTO BRAKES OFF and placard switch - AUTO BRAKES INOP.
OPERATIONS (O)
1. For antiskid system inoperative (two or more antiskid channels inoperative):
A. Takeoff and landing performance must be in compliance with Runway Performance Software (Finscap) for takeoff and OM-B for antiskid inoperative in landing.
B. Select AUTO BRAKES OFF
C. When stopping after landing and for refused takeoffs:
Close thrust levers and raise speedbrakes.
Initiate wheel braking using light pedal pressure and increase as ground speed decreases.
D. Cat III operations may require an operative autobrake system.
2. For one brake deactivated (one antiskid channel inoperative):
One brake deactivated with brake disconnect tool installed: stopping distances will be increased. Apply Runway Performance Software (Finscap) for takeoff and OM-B landing performance adjustments for one brake deactivated.
One brake deactivated with brake line capped: after takeoff the landing gear must remain extended for a minimum of two minutes to allow the wheel to stop rotating prior to gear retraction. Apply Runway Performance Software (Finscap) for landing gear extended and one brake deactivated. Apply OM-B landing performance adjustments for one brake deactivated.
NOTE: If a transducer fault exists, EICAS status message ALTN ANTISKID will remain displayed. Flight crews should be aware that loss of the right hydraulic system enroute will result in illumination of the ANTISKID light and display of the EICAS message. Braking effectiveness on the alternate system is reduced - brake with caution.
REPAIR INTERVAL
ITEM
32-42-2 ALTERNATE Antiskid
Valves C
C
NOTE: For Normal and Alternate Anti-skid System faults other than Alternate Anti-skid Valve faults, consult MEL item 32-42-1 for possible dispatch relief.
EICAS STATUS MESSAGES
ALTN ANTISKID
PLACARD
Airplane flight log - ALT ANTI-SKID VALVE INOP Airplane flight log as appropriate - ANTI-SKID INOP
MAINTENANCE (M)
1. Verify that manual braking capability is available on affected wheels as follows:
Provide electrical power.
Chock the wheels.
Release parking brake.
Depressurize right hydraulic system.
Provide left system hydraulic power.
Depress and release brake pedals. Observe brake unit wear indicator pins to check that all brakes apply and release.
If brakes apply and release on all brakes, manual braking capability on the alternate brake system is verified and dispatch is allowed without further maintenance action.
2. If manual braking is not be available on all brakes, use one of the following procedures.
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