(f)
Make sure that the pressure in system B is a minimum of 2800 psi.
S 866-138
(6) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2
1) AFCS B SNSR EXC AC
2) AFCS B FCC DC
3) AFCS B ENGAGE INTLK
4) AFCS WARN LIGHT
5) AFDS MCP CRS 2 DC
6) AFCS MACH TRIM B AC
7) AFCS MACH TRIM B DC
(b)
P18-1
1) AFCS A SNSR EXC AC
2) AFCS A FCC DC
3) AFCS A ENGAGE INTLK
4) AFCS WARN LIGHT
5) ALL EXCEPT AIRPLANES WITH -914 FCC;
AFDS Ail Force Limiter
6) AFDS MCP DC
7) AFCS MACH TRIM A AC
8) AFCS MACH TRIM A DC
S 866-139
(7)
Put the FLT CONTROL A and B switches (on the P5 panel) in the ON position.
S 796-140
(8)
Aileron Autopilot Actuator Test (hydraulic system B)
(a)
Disconnect the connector D1691 from the aileron autopilot actuator that is connected to hydraulic system B.
(b)
Connect the J2 lead from the test set to the aileron autopilot actuator.
(c)
Make sure the POWER switch on the test set is OFF.
(d)
Connect the power cable of the test set to the service outlet of the D152 electronic equipment rack.
(e)
Read the amperage or the flow value (for hydraulic system B) and write it here:
Amperage ____________(subtract system B basic current first)
Flow _______________ cc/minute (Value 1)
(f) Put the switches on the test set in these positions: 1) B SOLENOID EXCITATION PISTON switch -ON 2) B SOLENOID EXCITATION ENGAGE switch -ON 3) CURRENT SELECT switch -B T-VALVE 4) SOLENOIDS selector switch -B NORMAL
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
5) SOLENOID ON/OFF switch -ON
6) ACTUATOR SELECT switch -B ONLY
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL
_______ CONTROL SURFACES. THE CONTROL SURFACES CAN MOVE WHEN YOU SUPPLY POWER TO THE TEST SET. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(g)
Put the POWER switch (on the test set) in the ON position.
(h)
Adjust the B ONLY ACTUATOR SELECT POSITION CONTROL until the ailerons are at their neutral position.
(i)
After the flow becomes stable, read the amperage or the flow value and write it here:
Amperage _______________(subtract system B basic current first)
Flow _______________ cc/minute (Value 2)
(j)
Subtract the Value 1 flow from the Value 2 flow. The
difference must be less than 2000 cc/minute.
(k)
Put the POWER switch (on the test set) in the OFF position.
(l)
Put the B SOLENOID EXCITATION PISTON and the B SOLENOID EXITATION ENGAGE switches in the OFF position.
(m)
Disconnect the J2 lead from the aileron autopilot actuator.
1) Connect the D1691 connector to the aileron autopilot actuator.
S 796-141
(9) Aileron Autopilot Actuator Test (hydraulic system A)
(a)
Disconnect the connector D1827 from the aileron autopilot actuator that is connected to hydraulic system A.
(b)
Connect the J1 lead from the test set to the aileron autopilot actuator.
(c)
Make sure the POWER switch on the test set is OFF.
(d)
Connect the power cable of the test set to the service outlet of the D152 electronic equipment rack (if it is not connected).
(e)
Read the amperage or the flow value (for hydraulic system A) and write it here:
Amperage _______________(subtract system A basic current first)
Flow _______________ cc/minute (Value 3)
(f) Put the switches on the test set in these positions: 1) A SOLENOID EXCITATION PISTON switch -ON 2) A SOLENOID EXCITATION ENGAGE switch -ON 3) CURRENT SELECT switch -A T-VALVE 4) SOLENOIDS selector switch -A NORMAL 5) SOLENOID ON/OFF switch -ON 6) ACTUATOR SELECT switch -A ONLY
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