Technical data

13773-001
55-20
Page 1
ELEVATOR
1. GENERAL
This section covers procedures for servicing the elevator assembly. The elevator is a movable control sur-
face which is mounted in a horizontal position on the tail of the airplane. It is mounted to the horizontal sta-
bilizer and is used to rotate the airplane about its lateral axis. The elevator itself is made from aluminum
and the elevator tips are made from composite materials.
The elevator assembly is a conventional sheet metal control surface made of riveted aluminum skins, ribs
and spar. A lead balance weight is fastened to the inboard and outboard horn ribs at BL72. The elevator is
attached to the horizontal stabilizer at five hinge locations, BL0, BL ±36, and BL ±72. The elevator is
attached to a torque tube at BL ±3.33 and BL ±20. This torque tube is attached to a bell crank. The bell
crank is actuated by a pushrod that is attached to a pulley in the empennage area of the fuselage. The pilot
controls the actuation of this system.
2. MAINTENANCE PRACTICES
A. Elevator
(1) Removal - Elevator
(a) Remove access panels LE1 and RE1 to gain access to the bellcrank/elevator mounting
bolts. (Refer to 6-00)
(b) Remove the bellcrank/elevator mounting bolts, washers, self-locking nuts and shim.
(c) Remove the cotter pin and washer from each elevator hinge pin.
(d) Slide the elevator assembly off of the horizontal stabilizer hinge pins by sliding the elevator
away from the fuselage.
Note: A flat washer should be remaining on the inside of each hinge pin after the
elevator is removed.
(2) Installation - Elevator
CAUTION: Make sure a flat washer remains on the inner side of each hinge pin before
installing the elevator. Installing the elevator onto the hinge pins without a
flat washer in place can cause the elevator to bind.
(a) Ensure there is a flat washer installed on each hinge pin.
(b) Slide the elevator assembly against each flat washer on each of the hinge pins.
(c) Install a washer over each hinge pin. Secure the elevator assembly to each hinge pin with
new cotter pins.
(d) Insert bolt (with washer) into the right elevator, elevator bellcrank shim, bellcrank, and left
elevator assembly. Install flat washer and self-locking nut.
(e) Install remaining bolt, lock-nut, and washers, tighten nuts to 160-190 inch pounds (17.6-
20.9 N.m).
(f) Install the access panels LE1 and RE1. (Refer to 6-00)
(g) Operate the elevator and inspect for any abnormal resistance.
(3) Inspection/Check - Elevator
(a) Verify proper hinge bolt torque.
(b) Remove access panels LE1 and RE1. (Refer to 6-00)
(c) Verify proper hinge bolt installation and torque on inboard hinge.
(d) Ensure elevator skin is smooth and free of any defects or irregularities.
(e) Inspect rivets and elevator skin for tightness.
30 Nov 2000