(b)
Place both inboard and outboard antiskid switches to ON. Switches are located on center instrument panel.
(c)
Ensure that the following circuit breakers on P6 panel are closed:
1) INDICATOR LIGHTS
2) FLIGHT CONTROL VALVES
3) SPOILER SHUTOFF VALVES
4) AUTO SPEED BRAKE
5) ALL ANTISKID
(d)
Place engines No. 1 and 2 thrust levers in idle position.
(e)
Place speed brake control lever in ARMED position. Check that ARMED light on center panel comes on.
(f)
Move speed brake control lever forward to DOWN position and check that ARMED light goes off.
(g)
On airplanes not incorporating SB 31-1049 or SB 31-1054, set parking brake and restore interconnect valve as follows: 1) Place ground interconnect valve manual override lever to position 1 (closed). 2) Reconnect electrical connector to ground interconnect valve. 3) Close GROUND INTERCONNECT VALVE circuit breaker on P6 panel. 4) Set parking brake. 5) Place GROUND INTERCONNECT switch to CLOSE position. 6) Check that valve manual override lever is in position 1 (closed).
501
Oct 20/90 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 31-26-0 Page 525
(6) Test autobrake off ramp switch (S585) (Fig. 502), as applicable.
NOTE: If common attachment bolts which secure speed brake takeoff warning switch, arming switch and autobrake off ramp switch were loosened, the autobrake off ramp switch should be tested. If an adjustment was not made to the speed brake takeoff-warning switch this test is not necessary.
(a)
Set speed brake lever to DOWN position.
(b)
Connect ohmmeter across terminals C and NO of switch and check for continuity between switch terminals.
(c)
Move speed brake lever aft until open circuit is obtained between switch terminals.
(d)
Check the speed brake lever is 3.28 to 3.84 inches aft from down and locked position.
(e)
Remove ohmmeter and set speed brake lever to down position.
(7) Test air/ground relay.
(a)
Place flap control lever in 0 detent.
(b)
Advance No. 1 thrust lever until warning horn sounds.
(c)
Actuate the air-sensing switch on the landing gear accessory module on the E3-2 electrical shelf. Check that horn is silenced.
(d)
Release the air-sensing switch. Check the intermittent horn sounds.
(e)
Fully retard the No. 1 thrust lever. Check that horn is silenced.
31-26-0 Oct 20/90
Page 526
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
E. Test Takeoff Warning System (Airplanes with SB 31-1033, EPR Activated T/O Warn System)
(1)
Perform Prepare to Test Takeoff Warning System Procedures (par. 6.C.)
(2)
Test EPR Takeoff Warning Circuits (Self-Test Method)
(a)
Press and hold ENGINE No. 1 EPR test switch on the engine accessory module on the E3-2 electrical shelf. Check that the intermittent warning horn sounds and the EITHER EPR greater than 1.4 light on the engine accessory module illuminates.
(b)
Release the test switch. Check that the horn is silenced and the EPR light goes off.
(c)
Repeat steps (a) and (b) using ENGINE NO. 2 EPR test switch.
(d)
Press and hold either EPR test switch while opening and closing each of the following circuit breakers: AURAL WARNING; LANDING GEAR LIGHTS; EPR WARNING. Check that the intermittent horn stops when each circuit breaker is opened and starts when each circuit breaker is closed.
(e)
While pressing either EPR test switch, actuate the air-sensing switch on the landing gear accessory module on the E3-2 electrical shelf. Check that the horn is silenced.
(f)
Release the air-sensing switch. Check that the intermittent horn sounds.
(g)
Release the EPR test switch. Check that the horn is silenced and the EPR light goes off.
(3)
Test EPR Takeoff Warning Circuits (Engines Running Method)
(a)
Place thrust levers at idle stop position.
(b)
AIRPLANES WITH SB 31-1073;
Release the parking brake.
Apply the main landing gear brakes.
(c)
AIRPLANES WITHOUT SB 31-1073;
Set the parking brake.
(d)
Start engines No. 1 and 2 (Ref Chapter 71).
WARNING: OBSERVE ALL GROUND SAFETY PRECAUTIONS TO PREVENT INJURY TO PERSONNEL. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737 AMM 飞机维护手册 通讯描述和操作(66)
