(g)
Push inboard antiskid circuit breaker in. Ensure inboard ANTISKID INOP light goes off.
(h)
Pull outboard antiskid circuit breaker. Ensure outboard ANTISKID INOP light comes on.
(i)
Push outboard antiskid circuit breaker in. Ensure outboard ANTISKID INOP light goes off.
(2)
Test Antiskid Control Shield
(a)
Check press-to-test circuit of the four lights on the antiskid control shield located in the electrical/electronic equipment compartment.
(b)
Set parking brake.
(c)
Place SYSTEM TEST switch on antiskid control shield in LEFT position. Check for the following conditions:
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1) RO and RI lights are on
2) LO and LI lights are off
NOTE: Upon releasing swith, all lights will go off.
(d) Place SYSTEM TEST switch in RIGHT position. Check for the following conditions:
1) LO and LI lights are on
2) RO and RI lights are off
NOTE: Upon releasing switch, all lights will go off.
(e)
Release parking brake.
(f)
Depress and hold brake pedals. Check that all brakes are applied.
(g)
Hold SYSTEM TEST switch in LEFT or RIGHT position while performing step (h).
(h)
Press AIR SENSING TEST switch on landing gear electrical module.
1) Check that LI and RI lights on antiskid control shield
come on.
2) Check that left inboard and right inboard brake stacks
release and left outboard and right outboard brake stacks
remain applied.
(i)
Release AIR SENSING TEST switch and SYSTEM TEST switch. Check that all brakes are applied.
(j)
Test outboard touchdown protection function.
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1) Remove protective cover at test connector J2 on antiskid control shield. Antiskid control shield is located on E3-2 shelf in electrical equipment area. Install antiskid - autobrake - auto speed brake tester.
NOTE: Before installing, check that all switches on tester are off.
2) Set up tester as follows: a) Place master switch to ON position. b) Place WHEEL SPEED LO, LI, RO and RI switches in OFF position. c) Set rotary VELOCITY potentiometer to a position greater than 65 knots. d) Place WHEEL SPEED velocity switch in VEL position.
NOTE: Throughout the test, LO, LI, RO and RI switches referred to are located in tester WHEEL SPEED section. Disregard all lamps on tester during test.
3) Depress and hold brake pedals. Simulate a 65-knot wheel speed on left inboard and right inboard wheels with tester. Check that left outboard and right outboard brake stacks release and left inboard and right inboard brake stacks remain applied.
4) Remove left inboard wheel speed simulation. Check that left inboard brake releases and left and right outboard brakes apply.
5) Remove right inboard wheel speed simulation and reapply left inboard wheel speed simulation. Check that right inboard brakes release and left inboard brakes apply.
6) Remove left inboard wheel speed simulation and remove tester.
(k) Release brake pedals. Check that all brakes release.
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(3)
Test Left Outboard Antiskid Control Valve
(a)
Disconnect electrical connector D926 from left outboard antiskid control valve. Ensure outboard ANTISKID INOP light on pilot's panel and LO light on antiskid control shield come on.
(b)
Place COMPONENT TEST switch on antiskid control shield to VALVE position. Ensure outboard ANTISKID INOP light and LO light go off. Release COMPONENT TEST switch. Ensure outboard ANTISKID INOP light and LO light come on.
(c)
Connect electrical connector D926 to valve. Ensure outboard ANTISKID INOP light and LO light go off.
(d)
Ensure parking brake is released and disconnect electrical connector D928 from shutoff valve. Ensure inboard and outboard ANTISKID INOP lights come on.
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