(2)  
DFCS BITE

 B.  The other two tasks do a test of the elevator position sensor. They are:
 (1)  
BITE Test.

 (2)  
Manual Test.

 C.  The elevator position sensor is connected to the elevator torque tube and is installed on the aft bulkhead station 1156 (AMM 27-31-00/201).
 D.  To get access to the elevator position sensor, you will remove access panel 3802 on the tail cone (AMM 12-31-41/201).
 E.  The autopilot system and all elevator rigging must fully adjusted before the actuator can be adjusted. The mach trim actuator must be able to operate and the actuator nulled.
 TASK 22-11-30-825-001
 2.  Elevator Position Sensor Adjustment (F80217-103 Test Set)___________________________________
 A.  Standard Tools and Equipment
 (1)  
VTVM - Fluke (digital).

 (2)  
F80217-103 Test Set - Autopilot Elevator/Rudder/Aileron Control Unit.

 B.  References
 (1)  
AMM 12-31-41/201, Access Doors and Panels

 (2)  
AMM 24-22-00/201, Electrical Power Control

 (3)  
AMM 27-31-00/201, ELevator and Tab Control System

 (4)  
AMM 27-41-00/501, Horizontal Stabilizer Trim Control System

 C.  Access
 (1)  
Location Zone
 102 Control Cabin
 705 Tail Cone Access Panel

 (2)  
Access Panels
 3802 Tail Cone Access Door

 D.  Prepare to Adjust
 S 865-002
 (1)  Supply electrical power (AMM 24-22-00/201).
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 S 765-006
 (2)  Make sure the mach trim actuator is nulled.
 NOTE: The actuator is nulled when the voltage measured between
____
 jacks J6-37 and J6-1 on the FCC is below 50mV.

 S 865-007
 (3)  
Open the circuit breakers shown below and attach DO-NOT-CLOSE tags.

 (a)  
P18-1 Circuit Breaker Panel
 1) AFCS A SNSR EXC AC
 2) AFCS A FCC DC
 3) AFCS A ENGAGE INTLK
 4) AFCS WARN LIGHT
 5) AFDS AIL FORCE LIMITER (737-300/-400 only)
 6) AFDS MCP DC
 7) MACH TRIM A AC
 8) MACH TRIM A DC
 9) AFC AUTO THROTTLE AC
 10) AFC AUTO THROTTLE DC
 11) AFC YAW DAMPER AC
 12) AFC YAW DAMPER DC

 (b)  
P6-2 Circuit Breaker Panel
 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) MACH TRIM B AC
 7) MACH TRIM B DC
 8) LANDING GEAR LATCH AIR/GND RELAY AND LIGHTS

 (4)  
Remove access panel 3802 on the tail cone (AMM 12-31-41/201).

 S 825-009

 (5)  
Set the horizontal stabilizer at 3 units of trim equal to the jackscrew "B" dimension of 41.57 +/- 0.05 inches (AMM 27-41-00/501).

 S 015-008
 NOTE: One person must be in the tail with a headset and the other
____
 person in the control cabin.

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 (6)  S 485-010Connect the power cable between the test set and the power outlet on the (D152) electronic equipment rack or an equivalent power outlet.
 (7)  S 035-011Disconnect D1681 (A system) and D1687 (B system) connectors from the autopilot actuators.
 (8)  S 485-012Connect the -3 test cables as follows: (a) J1 to actuator A (b) J2 to actuator B.
 (9)  S 485-013Connect the VTVM to the LVDT EXCITATION jacks J10A and J11A on the test set.
 S 485-014
　
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