Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (67)
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CHAPTER 67 – FLIGHT CONTROLS (67-00-00)

COPYRIGHT

2007 BY DART AEROSPACE LTD.

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO
ANY OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
6
Date: 13.08.26
67.5 SYNCHRONIZED ELEVATOR
67.5.1 Synchronized
Elevator
The synchronized elevator consists of two
elevators, one on each side of tailboom (Figure
67-18). Each elevator is a horizontal airfoil section
built up on a spar tube which is inserted into a
projecting end of a horn assembly and secured by
two bolts. The horn assembly is installed
horizontally through sides of the tailboom and is
secured to the structure by supports which serve
as bearings for rotational movement. A control arm
on the horn provides attachment for linkage from
the fore-and-aft cyclic control system at the
swashplate.
67.5.2 Maintenance
67.5.2.1 Removal
Remove either synchronized elevator assembly as
follows:
67.5.2.1.1
Remove access door from bottom
of tailboom below elevator.
67.5.2.1.2
Remove cotter pin (15, Figure 67-
18), nut (14), washers (13), and bolt (12).
67.5.2.1.3
Remove special retaining bolt (2),
with washer, to detach elevator fitting from lug (4)
on horn assembly (5).
67.5.2.1.4 Withdraw
elevator straight
outboard until spar tube (3) is pulled free from
horn assembly (5).
67.5.2.1.5
If horn (5) is to be removed,
proceed as follows:
67.5.2.1.5.1
Disconnect control tube assembly
from arm (6) on horn assembly.
67.5.2.1.5.2
At each end of horn assembly
(inside tailboom) remove two bolts with nuts,
washers, and shims (8) which attach upper and
lower retainers (7).
67.5.2.1.5.3 Remove bolts and washers
attaching retainers (7) and shim sets (9) to
tailboom support brackets (10). Remove
retainers and shim sets.
CAUTION
HANDLE RETAINERS WITH CARE TO AVOID
DAMAGING INNER SURFACES OF
BUSHINGS. KEEP REMOVED PARTS IN
SETS.
67.5.2.1.5.4
Remove horn assembly through
access opening in bottom of tailboom.
67.5.2.2 Inspection and repair
MATERIALS REQUIRED
NUMBER NOMENCLATURE
C-300 Adhesive
C-305 Aliphatic
Naphtha
C-306 Toluene
67.5.2.2.1
Inspect elevator for damage,
dents, and cracks.
67.5.2.2.2
Check elevator radial movement
as follows:
67.5.2.2.2.1 With
elevators installed, mount
a dial indicator on tailboom with stylus in contact
with upper surface of elevator at spar station.
67.5.2.2.2.2
Lightly move elevator up and
down and observe total reading on dial indicator.
Maximum play of 0.010 in (0.254 mm) is
permissible. If reading is riot within allowable
limits, accomplish following steps 67.5.2.2.2.3
through 67.5.2.2.2.5.
67.5.2.2.2.3 Check elevator for proper
installation (paragraph 67.5.2.3).
67.5.2.2.2.4 Check drag on support
assembly (paragraph 67.5.2.3).
67.5.2.2.2.5
Inspect elevator and support in