(c)
Make a mark on the tape showing the upward limit of elevator travel.
(d)
Apply a downward force of 8 士0.5 pounds to the right elevator. The force should be applied within 0.5 inch forward of the trailing edge and 1 inch outboard of the inboard edge.
(e)
Make a mark on the tape showing the downward limit of elevator travel.
(f)
Measure the distance between the upward limit mark and the downward limit mark.
(g)
Make sure that the distance does not exceed 0.21 inch.
(6) Release the pressure from the elevator control hydraulic system B (AMM 27-31-0/201).
B. Do a check of the elevator tab freeplay with the clamped hinge loosened (Fig. 603):
(1) On clamped hinges:
NOTE: A clamped hinge is installed on either the no. 1 or no. 2 hinge. A flanged bushing should be visible on the inboard side of the elevator hinge bracket.
(a)
Remove and discard the cotter pin.
(b)
Loosen the castellated nut 2 turns.
(2)
Pressurize the elevator control hydraulic systems A and B (AMM 27-31-0/201).
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES AND THE LANDING GEAR WHEN HYDRAULIC POWER IS SUPPLIED. THE AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, STABILIZER, LANDING GEAR AND THRUST REVERSERS CAN MOVE QUICKLY WHEN SUPPLIED WITH POWER BY THE HYDRAULIC SYSTEMS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
(3)
Set the stabilizer at 3 士0.5 units of trim.
(4)
Use a device that can cause a blockage of the elevator to prevent its motion during the check.
CAUTION: BE VERY CAREFUL WHEN YOU INSTALL A DEVICE TO CAUSE A BLOCKAGE OF THE ELEVATOR. THE ELEVATOR IS MADE OF COMPOSITE MATERIALS. THE DEVICE CAN CAUSE DAMAGE TO THE ELEVATOR IF YOU ARE NOT CAREFUL.
NOTE: You can put a piece of wood between the elevator and the airplane structure to prevent elevator movement.
(5) Attach a mounting device to the elevator in line with the hinge.
CAUTION: BE VERY CAREFUL WHEN YOU INSTALL THE MOUNTING DEVICE. THE ELEVATOR IS MADE OF COMPOSITE MATERIALS. THE MOUNTING DEVICE CAN CAUSE DAMAGE TO THE ELEVATOR IF YOU ARE NOT CAREFUL.
(a)
Attach the dial indicator plunger directly over the top of the hinge centerline.
(b)
Adjust the dial indicator to zero.
500
27-09-600 Page 608 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/01
L39574
500 Elevator Tab Hinge Free-Play Checks
May 01/01 Figure 603 (Sheet 2) 27-09-600
Page 608A
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(6) Use a force scale to apply a force of 7 士0.5 pounds in the up direction. The force is to be applied in line with the plunger.
CAUTION: USE SUFFICIENT PADDING ON THE FORCE SCALE TO PREVENT DAMAGE TO THE CONTROL SURFACE.
(a)
Make a record of the travel shown on the dial indicator.
(b)
Slowly remove the force.
(c)
Reset the dial indicator to zero.
(7)
Use a force scale to apply a 7 士0.5 pound force in the down direction. The force is to be applied as close as possible to the plunger without disturbing it.
(a)
Make a record of the travel shown on the dial indicator.
NOTE: Do not adjust the dial indicator
(b)
Slowly remove the force.
(8)
FOR AIRPLANES WITH GRAPHITE/COMPOSITE ELEVATOR TAB; make sure the sum of the two travel records is not more than 0.036 inch.
(9)
FOR AIRPLANES WITH ALUMINUM FIBERGLASS ELEVATOR TAB; make sure the sum of the two recorded travels is not more than 0.030 inch.
(10)
Remove the dial indicator.
(11)
Remove the mounting device.
(12)
Remove the device that you used to cause a blockage.
(13)
Repeat previous 12 steps for remaining hinges.
(14)
On Clamped Hinge, tighten the nut to 50-80 inch-pounds. Install cotter pin.
C. Do a check of the elevator tab freeplay with the no. 1 hinge loose (Fig. 603):
(1)
Make sure the cotter pin is remove/discarded and nut loosened at least 2 full turn on the no. 1 hinge of the elevator tab.
(2)
Pressurize the elevator control hydraulic systems A and B (AMM 27-31-0/201).
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES AND THE LANDING GEAR WHEN HYDRAULIC POWER IS SUPPLIED. THE AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, STABILIZER, LANDING GEAR AND THRUST REVERSERS CAN MOVE QUICKLY WHEN SUPPLIED WITH POWER BY THE HYDRAULIC SYSTEMS. INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 1(42)
