S 864-003
(2)
Open these circuit breakers and attach the DO-NOT-CLOSE tags:
(a) P6 Circuit Breaker Panel 1) AUTO FLT CONT SYS B MACH TRIM AC 2) AUTO FLT CONT SYS B MACH TRIM DC 3) AFDS MCP CRS-2 4) AUTO FLT CONT SYS B SNSR EXC AC 5) AUTO FLT CONT SYS B FCC DC 6) AUTO FLT CONT SYS B ENGAGE INTLK B
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A 737-300/400/500MAINTENANCE MANUAL
QUADRANT SHAFT OUTPUT B ACTUATOR AUTOPILOT
CONTROL ELEVATOR ARM
SEE A AUTOPILOT A ACTUATOR
A/P ACTUATOR B A PCU ELEVATOR SEE B FWD B PCU ELEVATOR SHAFT QUADRANT INPUT
PRESSURE SWITCH
ROD ASSEMBLY LEVER ASSEMBLY CONNECTOR ELECTRICAL WASHER NUT BOLT NUT WASHER MOUNTING BOLT SHEAR RIVETS A
PRESSURE SWITCH LINE HYDRAULIC 9.43 INCHES NOMINAL NUT WASHER CLAMP BOLT
REDUCER BOLT WASHER LEVER ASSEMBLY
ROD ASSEMBLY A/P ACTUATOR A NOMINAL 17.52 INCHES NUT WASHER BOLT SHEAR RIVETS
SHAFT QUADRANT INPUT
B
A/P Elevator Actuator Installation Figure 401
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A 737-300/400/500MAINTENANCE MANUAL
7) AUTO FLT CONT SYS B WARN LIGHT BAT
(b) P18 Circuit Breaker Panel 1) AUTO FLT CONT SYS A MACH TRIM AC 2) AUTO FLT CONT SYS A MACH TRIM DC 3) AFDS MCP DC 4) AIRPLANES WITH MECHANICAL AILERON FORCE LIMITER;
AFDS AIL FORCE LIM 5) AUTO FLT CONT SYS A SNSR EXC AC 6) AUTO FLT CONT SYS A FCC DC 7) AUTO FLT CONT SYS A ENGAGE INTLK A 8) AUTO FLT CONT SYS A WARN LIGHT BAT
S 014-004
(3) Remove the access door, 3801 or 3802, of the tail cone (Ref
12-31-41/201) to get access to the actuator.
D. Procedure
S 034-005
(1)
Disconnect the hydraulic lines from the hydraulic ports on the actuator. Seal the hydraulic lines and the hydraulic ports with plugs.
S 034-006
(2)
Remove the electrical connectors from the actuator and the hydraulic pressure switch.
S 034-007
(3)
Remove the hydraulic pressure switch. Seal the hydraulic port with a plug. Keep the hydraulic pressure switch.
S 034-008
(4)
Remove the clamp-bolt, washer, and nut that attach the lever assembly to the actuator. Remove the nut and washer that attach the output shaft of the actuator to the lever assembly.
(5)
Try to turn the shear rivets by hand to see if they are loose.
S 214-039
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737-300/400/500MAINTENANCE MANUAL
S 214-052
(6)
Quickly move the fitting and the arm of the lever assembly in opposite directions.
S 214-044
(7)
If there is movement between the parts, one or both of the rivets are loose.
S 214-045
(8)
Put a 0.0375 to 0.0395 inch (0.9525 to 1.0033 millimeter) diameter pin into the rivet inspection hole.
(a)
Make sure that the pin moves freely.
(b)
Repeat this step for the other rivet inspection hole.
