(28)
Do this task: "Operational Test - Elevator Power Control Unit" (Ref paragraph 3).
TASK 27-31-14-705-001
3. Operational Test - Elevator Power Control Unit
______________________________________________
A. General
(1) The left and the right PCUs operate independently from the separate hydraulic systems. You can do the test of the left and the right PCUs together. Alternatively, you can do the test of one PCU at a time.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
B.
C.
D.
E.
F.
A
737-300/400/500MAINTENANCE MANUAL
Special Tools and Equipment
(1)
F80055-1 - Trammel BarStandard Tools and Equipment
(1)
Scale - 0-2 feetReferences
(1)
24-22-00/201, Manual Control
(2)
27-31-00/201, Elevator and Tab Control SystemAccess
(1)
Location Zone 704 Tail Cone 711 Elevator and Tab, LH 712 Elevator and Tab, RH
(2)
Access Panels 3801 Tail Cone Access Door, LH 3802 Tail Cone Access Door, RH
Procedure
S 865-032
(1)
Use the trammel bar to set the B dimension at 41.57 |0.01 inches.
S 865-033
(2)
Do this task: "Null Procedure - Mach Trim Actuator" (Ref 27-31-00/201).
S 865-034
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL CONTROL
_______ SURFACES BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS, ELEVATORS, FLAPS, SPOILERS, LANDING GEAR CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(3)
Do this task: "Pressurize the Elevator Hydraulic Systems A and B" (Ref 27-31-00/201).
S 825-035
(4)
Align the trailing edge of the right elevator with the index mark on the tail cone:
(a)
Move the captain's control column lightly in longitudinal direction to make sure the control column is in the center. 1) Release the control column.
(b)
Move the captain's control column approximately 2 degrees in forward direction. 1) Release the control column. 2) Make sure the trailing edge of the right elevator aligns
with the index mark in 0.12 inch.
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A 737-300/400/500MAINTENANCE MANUAL
(c) (d) Move the control column approximately 2 degrees aft. 1) Release the control column. 2) Make sure the trailing edge of the right elevator aligns with the index mark in 0.12 inch.Move the control column lightly in the longitudinal direction to make sure the control column is in the center. 1) Make sure the trailing edge of the right elevator aligns with the index mark in 0.06 inch.
(5) S 715-036Make sure the PCUs are synchronized: (a) Set the FLT CONTROL A switch to OFF and then to ON. (b) Set the FLT CONTROL B switch to OFF and then to ON. (c) Make sure that the inboard end of the elevator trailing edge moves 0.02 inch or less.
(6) S 865-037Set the FLT CONTROL A switch to OFF.
(7) S 865-054Make sure the FLT CONTROL B switch is in ON.
(8) S 865-038Move the captain's control column aft until the control column stops and hold.
(9) S 715-039Do a check of the movements of the trailing edge of the right elevator from the index mark: (a) Make sure the elevator trailing edge moves up 14.60 +0.30/-0.55 inches from the index mark.
S 715-040
(10)
Do a check of the movements of the trailing edge of the right elevator tab:
(a)
Make sure the tab trailing edge moves down 1.54 |0.12 inch from the elevator trailing edge.
S 865-041
(11) Move the captain's control column forward until the control column stops and hold.
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