Canopy; Description - Diamond DA20-C1 Maintenance Manual

DA20-C1 AMM
1. General
The DA 20-C1 aircraft has a one-piece lifting canopy. It has a carbon-fiber reinforced plastic (CFRP)
frame and one large acrylic transparency. The transparency has two small emergency windows.
The canopy has a hinge at the back and a stabilizing rod on each side. The support arms have
counterbalance springs to help operate the canopy.
A locking system locks the canopy closed. Two latch-levers operate the locking system. One lever is on
the inside of the canopy on the left side. And one lever is on the inside of the canopy on the right side.
Later model aircraft are equipped with handles located on the outside of the canopy in addition to the
internal ones.
The canopy has a warning light system. The red warning light comes on when the canopy is not correctly
locked. The warning light is on the instrument panel.
2.

Description

A. Canopy Structure
Figure 1 shows the canopy. The canopy has a CFRP frame. A one-piece acrylic transparency
attaches to the frame with screws and flexible adhesive. The transparency has two sliding side
windows. The sliding side windows are on each side of the canopy with move in guide rails.
The canopy has a tubular rubber seal. The seal goes round the edge of the canopy frame. When
the canopy is closed the seal touches cockpit sill.
B. Canopy Hinges
The canopy attaches to the fuselage with three hinges. One hinge at the back of the canopy and
one at each side. A large spring attaches between each side arm and the rear fuselage. The
springs help balance the weight of the canopy.
C. Canopy Locking
A latch mechanism attaches to each side of the canopy. There are two possible configurations of
these latches. On older aircraft, there are latch handles on the inside of the canopy only. Newer
aircraft have handles on the outside of the canopy in addition to the internal ones.
The latches with internal handles only are constructed as follows (Refer to Figure 201):
- Two steel plates make the body of the latch assembly with aluminum spacers between them.
The inboard plate attaches to the canopy frame by four stainless steel screws. One of the
aluminum spacers between the plates makes a stop for the canopy handle. Each latch
mechanism has a red painted grip that attaches to a steel plate, which serves as the handle
and the hook. The hook has a steel boss with an internal PTFE (Teflon) lined plain bearing.
The hook turns around an internally threaded steel shaft welded to the outboard side plate.
The shaft goes into a clearance hole in the inboard side plate. Also on the shaft are conical
washers that provide friction. A steel screw compresses the conical washers so that the
friction can be adjusted to obtain the correct latching force.
DA201-C1
Rev 16

CANOPY

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Doors
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30 Oct 09