(b)
Get access to the input rods of the elevator PCU through access door 3801 or 3802.
(c)
Install the rig pin E-5 in the aft control quadrant.
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF ALL
_______ CONTROL SURFACE BEFORE YOU SUPPLY HYDRAULIC POWER. AILERONS, RUDDERS ELEVATORS, FLAPS, SPOILERS, SLATS, AND THRUST REVERSERS CAN MOVE QUICKLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(d)
Do this task: "Pressurize the Elevator Hydraulic Systems A and B" (AMM 27-31-00/201).
(e)
Set the FLT CONTROL A switch to OFF, and the FLT CONTROL B switch to ON.
(f)
Measure the distance from the trailing edge of the right elevator to the index mark (Fig. 505): 1) Set the FLT CONTROL B switch to OFF. 2) Loosen the checknuts on the input rod, but do not change
the rod length.
3) If it is necessary, get access to the checknuts: a) Remove the rig pin E-5. b) Push the elevator trailing edge down to get access to
the checknuts.
4) Put the elevator to the neutral position: a) Align the trailing edge with the index mark. b) Set the FLT CONTROL B switch to ON. c) Move the control column lightly in the forward and aft
directions to make sure the system is in the center
position. d) Release the control column. e) Set the FLT CONTROL B switch to OFF. f) Install the rig pin E-5.
(g) If the distance from the trailing edge of the right elevator to the index mark is more than 0.4 inch, Adjust the right input rod: 1) Disconnect the lower end of the input rod from the quadrant
crank (Fig. 506).
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(h)
(i)
A
737-300/400/500MAINTENANCE MANUAL
2) Adjust the input rod to align the elevator trailing edge and the index mark to less than 0.04 inch. 3) Install the lockbolt assembly with a washer below the bolt head. 4) Tighten the outer bolt to 75-85 pound-inches.
CAUTION: DO NOT TRY TO TIGHTEN THE OUTER BOLT AGAIN AFTER YOU
_______ TIGHTEN THE LOCKNUT. YOU CAN CAUSE DAMAGE TO THE EQUIPMENT
5) Install the locknut with a washer on the end of the inner bolt. a) Tighten the locknut to 15-20 pound-inches.
If the distance from the trailing edge of the right elevator to
the index mark is less than 0.4 inch,
Adjust the sleeve of the right input rod:
1) Set the FLT CONTROL B switch to ON.
2) Turn the sleeve until the trailing edge of the elevator
aligns with the index mark in 0.04 inch or less. 3) Tighten the two checknuts on the input rod. 4) If it is necessary, get access to the checknuts:
a) Set the FLT CONTROL B switch to OFF.
b) Remove the rig pin E-5.
c) Push the elevator trailing edge down to get access to
the checknuts.
5) Put the elevator to the neutral position: a) Align the elevator trailing edge with the index mark. b) Set the FLT CONTROL B switch to ON. c) Move the control column lightly in the forward and aft
directions to make sure the system is in the center
position.
d) Release the control column.
e) Set the FLT CONTROL B switch to OFF.
f) Install the rig pin E-5.
Make sure the FLT CONTROL B switch is in OFF.
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A 737-300/400/500MAINTENANCE MANUAL
SEE A
FWD
POWER CONTROL UNIT
CLEVIS 1
SLEEVE 1
ROD 1
POWER CONTROL UNIT INPUT ROD
1 1/2 TURN OF THE SLEEVE MOVES THE ELEVATOR TE THE SLEEVE AND THE ROD IN THE SAME DIRECTION. KEEP THE NUMBER OF THREADS THAT SHOWED ON THE TWO SIDES OF THE SLEEVE APPROXIMATELY EQUAL. 0.15 INCH. 1/2 TURN OF THE ROD MOVES THE ELEVATOR TE 0.18 INCH. MAKE SURE TO ADJUST AFT CONTROL FWD QUADRANT CRANK A
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