E. Functional Test Actuator
(1)
Assure pilot's control wheel is centered in neutral position.
(2)
Assure aileron trim is set at zero.
(3)
Disconnect wiring from aileron position sensor and connect J-3 (A SENSOR) from test set to sensor (sensor is located near the aileron power control unit input shaft in wheel well).
(4)
Connect vacuum tube voltmeter (VTVM) to LVDT FEEDBACK - A jacks, J10A and J11A.
(5)
Connect second VTVM to NSS FEEDBACK - A, jacks J7A and J8A.
(6)
Set switches on test set as follows:
(a)
LVDT FEEDBACK - A ON, B OFF
(b)
LVDT EXCITATION - A ON, B OFF
(c)
SOLENOID EXCITATION - (PISTON and ENGAGE) A ON, B OFF
(d)
NSS EXCITATION - A ON, B OFF
(e)
NSS FEEDBACK - A OFF, B OFF
(f)
CURRENT SELECT - A T-VALVE
(g)
SOLENOIDS ON/OFF (Center Switch) - ON
(h)
A&B SOLENOID - A NORM, B NORM
(i)
ACTUATOR SELECT - A ONLY
(j)
POWER - ON
(7)
The following lights should be ON:
(a)
SOLENOID EXCITATION - PISTON and ENGAGE - A
(b)
LVDT EXCITATION - A
(c)
NSS EXCITATION - A
(d)
POWER
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NOTE: All other lights should be OFF.
(8)
Assure both hydraulic systems A and B are ON.
(9)
Apply a command signal as required, by turning POSITION CONTROL A knob and check for aileron deflections within the following tolerances:
Right Aileron
Test LVDT Output Aileron Sensor Output
Condition (J10A and J11A) Position (a) (J7A and J8A)
Minimum Command Null (80 MV Max) 0 + 0.03" 60 MV Max Signal Up Aileron 5.0 +0.03 Volts 1.00 +0.10" (b) 1.85 +0.25 Volts Signal Down Aileron 5.0 +0.03 Volts 1.00 +0.10" (b) 1.85 +0.25 Volts
(a)
Linear measurements are between point "A" (center of index plate on structure) and point "B" (center of index plate on inboard end of aileron).
(b)
Optional angular measurement: 5.00 +0.50 degrees.
Return POSITION CONTROL A knob to Minimum Command position after completion of test.
(10)
Disconnect VTVM's.
(11)
Disconnect J-3 (A SENSOR) from aileron position sensor and connect J-4 (B SENSOR) from test set to sensor.
(12)
Connect VTVM to LVDT FEEDBACK - B, jacks J10B and J11B.
(13)
Connect second VTVM to NSS FEEDBACK - B, jacks J7B and J8B.
(14)
Set switches on test set as follows:
(a)
LVDT FEEDBACK - A OFF, B ON
(b)
LVDT EXCITATION - A OFF, B ON
(c)
SOLENOID EXCITATION - (PISTON and ENGAGE), A OFF, B ON
(d)
NSS EXCITATION - A OFF, B ON
(e)
NSS FEEDBACK - A OFF, B OFF
(f)
CURRENT SELECT - B T-VALVE
(g)
SOLENOIDS ON/OFF (Center Switch) - ON
(h)
A&B SOLENOID - A NORM, B NORM
(i)
ACTUATOR SELECT - B ONLY
(j)
POWER - ON
(15)
The following lights should be ON:
(a)
SOLENOID EXCITATION - PISTON and ENGAGE - B
(b)
LVDT EXCITATION - B
(c)
NSS EXCITATION - B
(d)
POWER
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Oct 20/83 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 22-11-251 Page 503
NOTE: All other lights should be OFF.
(16)
Repeat step (9), substituting POSITION CONTROL B knob instead of A knob.
(17)
Set switches on test set as follows:
(a)
LVDT FEEDBACK - A ON, B ON
(b)
LVDT EXCITATION - A ON, B ON
(c)
SOLENOID EXCITATION - A: (PISTON and ENGAGE) ON
(d)
SOLENOID EXCITATION - B: PISTON ON, ENGAGE OFF
(e)
NSS EXCITATION - A OFF, B OFF
(f)
NSS FEEDBACK - A OFF, B OFF
(g)
CURRENT SELECT: A T-VALVE
(h)
SOLENOIDS ON/OFF (Center Switch): ON
(i)
A&B SOLENOID - A NORM, B NORM
(j)
ACTUATOR SELECT: A ONLY
(k)
POWER: ON
(18)
The following lights should be ON:
(a)
SOLENOID EXCITATION - PISTON and ENGAGE - A
(b)
SOLENOID EXCITATION - PISTON - B
(c)
LVDT EXCITATION - A and B
(d)
POWER
NOTE: All other lights should be OFF.
(19)
Operate POSITION CONTROL A knob until trailing edge of right aileron moves 1.00 +0.10 inches down (5.00 +0.10 degrees). Lock POSITION CONTROL knob in place. Record actual aileron position.
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