(a)  
Check that AUTO AC POWER, AUTO DC POWER, MANUAL AC POWER, MANUAL DC POWER, STANDBY AC POWER, and STANDBY DC POWER circuit breakers on the P6 panel are closed.

(b)  
Place FLT-GRD switch on P5 panel in GRD position.

(c)  
Set first officer's altimeter located on panel P3 to maximum (31.01 inches).

(d)  
Set pressurization switch on the P5 panel in STANDBY position.

(e)  
Set cabin altitude to -990 feet on pressurization selector panel. Check that outflow valve is open.

(f)  
Press and hold GRD SENSING TEST switch on landing gear electrical module. Check that outflow valve closes.

(g)  
Release GRD SENSING TEST switch. Check that outflow valve opens.

(18)
Test voice recorder function of landing gear electrical module.

(a)  
Check that VOICE RECORDER circuit breaker on P6 panel is closed.

(b)  
Check that parking brake is set.

(c)  
Monitor voice recorder control unit with headset.

(d)  
Press and hold the erase switch on P5 panel for 5 seconds.
Check that a loud tone is heard when switch is released.

(e)  
Press and hold GROUND SENSING TEST switch on landing gear module.

(f)  
Press and hold the erase switch for 2 seconds. Check that no tone is heard.

(g)  
Release GROUND SENSING TEST switch.

(h)  
Release parking brake.

(i )  Repeat step (f). Result should be the same.
(j)  Set parking brake.

(19)
Test flap load limiter function of landing gear electrical module.

(a)  
Check that FLAP LOAD LIMITER circuit breaker on P6 panel is closed.

(b)  
Position flap handle in any position except 40 units.

(c)  
Set FLAP LOAD LIMITER TEST switch in TEST position. Switch is located at station 350 near the equipment rack light. Check that load limiter test light comes on.

(d)  
Press GROUND SENSING TEST switch on front of landing gear electrical module. Check that load limiter test light goes off.

(e)  
Release GROUND SENSING TEST switch. Check that load limiter test light comes on.

(f)  
Set FLAP LOAD LIMITER TEST switch in normal position. Check that load limiter test light goes off.

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(20) Test automatic braking function of landing gear electrical module.
(a)  
Check that ANTI-SKID FAILURE WARNING, OUTBOARD ANTI-SKID, INBOARD ANTI-SKID, and AUTOBRAKE CONTROL circuit breakers on P6 panel are closed.

(b)  
Place speed brake handle in DN position.

(c)  
Check that throttles are fully retarded and antiskid system is operational.

(d)  
Check that wheel chocks are in place and release parking brake.

(e)  
Pressurize hydraulic system B (Ref 29-12-0).

(f)  
Connect antiskid/autobrake tester to receptacle on front of antiskid module. 1) Set tester master switch to ON position. 2) Set tester wheel speed LO, LI, RO, and RI switches to OFF position. 3) Set tester wheel speed velocity switch to VEL position. 4) Set tester wheel speed velocity potentiometer to a position greater than 75

knots.
NOTE:  Throughout this test LO, LI, RI, and RO switches referred to are those in WHEEL SPEED section of tester unit.
Disregard lights on tester unit while performing this test.
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(g)  
Press and hold AIR SENSING TEST button on landing gear accessory unit.

(h)  
Place AUTOBRAKE selector switch on pilots center panel to MIN position.

(i)  
Set tester wheel speed switches RI and LI to ON position and check that autobrake valve opens.

NOTE:  When the valve opens there will be an audible thump in the wheel well and the indicator needle on the hydraulic pressure gage in the P2 panel will jump.

(j)  
Turn the AUTOBRAKE selector switch to OFF position and release AIR SENSE test button on landing gear accessory unit.

(k)  
Repeat steps (g) thru (j) using the following tester switch combinations and check for the same results as stated in step (i). 1) Tester switch RI and LO. 2) Tester switch RO and LI. 3) Tester switch RO and LO.

(l)  
Repeat steps (g) thru (j) using the following tester switch combinations and check that autobrake valve does not open. 1) Tester switch RI and RO. 2) Tester switch LI and LO.
　
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