Horizontal Stabilizer - Diamond DA20-C1 Maintenance Manual

DA20-C1 AMM
1. General
The DA20-C1 aircraft has the usual horizontal stabilizer. The horizontal stabilizer attaches to the top of
the vertical stabilizer. The elevator attaches to the trailing edge of the horizontal stabilizer. Refer to
Chapter 55-20 for data about the elevator structure.
2. Description
The horizontal stabilizer has top and bottom shells. Each shell has GFRP skins with a rigid foam core.
The top shell has no cut-outs. The bottom shell has a large cut-out at the rear for the elevator horn and
mass balance. It also has two small triangular holes forward and aft of the front rib.
The horizontal stabilizer has a main spar. The spar has GFRP skins with a rigid foam core. It also has top
and bottom flanges. The main spar bonds to the top and bottom shells with bonding paste.
The main spar has four holes for the mount plate. You can get access to the attachment bolts from
below. The mount plate goes down through the large cut-out in the bottom shell. Four more holes in the
bottom part of the mount plate attach to the vertical stabilizer top rib.
Fore and aft center ribs give strength to the center area. Both ribs are rigid GFRP moldings. They bond
to the other components with bonding paste. The front rib has a triangular shape.
The aft rib has sides with bends and a top face which joins the sides. It closes the sides of the large
cut-out in the bottom shell. The aft part has three holes on each side for the center hinge plates for the
elevator.
Left and right trailing edge webs close the trailing edges of the top and bottom shells. The webs also hold
the hinges for the elevator. Small holes in the bottom shell give access to the nuts which attach the
hinges. The webs bond to the top and bottom shells and the aft rib with bonding paste.
A small GFRP rib at each side closes the elevator cut-out. The rib bonds to the other components with
bonding paste.
A rigid GFRP fairing goes around the joint between the horizontal stabilizer and the vertical stabilizer.
Four screws attach the fairing to the vertical stabilizer.
DA201-C1
Rev 16

HORIZONTAL STABILIZER

55-10-00
Stabilizers
Page 1
30 Oct 09