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procedure must be repeated until the filler is proud of the transparency surface.
Windows
DA20-C1 AMM
Page 2
30 Apr 2008 56-10-00 Doc # DA 201-C1
Rev. 13
5. Temporary Repair to the Canopy Transparency
To prevent further propagation of cracks before a permanent repair is possible, stop-drill the ends
of the crack with a 2.4 mm (0.1 in) diameter hole.
Figure 1 – Temporary Repair
2.4 mm diameter
DA20-C1 AMM
Windows
Doc # DA 201-C1
Rev. 13 56-10-00 Page 3
30 Apr 2008
6. Permanent Repair to the Canopy Transparency
To make a permanent repair carry out the following standard procedure:
Detail Steps/Work Items Key Items
(1) If necessary, remove the canopy for the
repair. Put the canopy on a firm working
surface with the crack horizontal.
Refer to the Aircraft Maintenance Manual
Chapter 52-10.
(2) If the canopy will stay on the aircraft for the
repair, put protective covers over the inside
of the cockpit.
(3) Mask the area around the crack on the inner
and outer surfaces of the canopy.
(4) Use a high-speed grinder to cut a groove
along the crack on the outer surface of the
transparency.
Detailed in Fig. 3, step 1.
(5) On the outer surface, countersink the
temporary stop-drill holes.
Detailed in Fig. 4, step 1.
(6) On the inner surface, seal-off the stop-drill
holes with masking tape.
(7) Apply filler to the groove and stop-drill holes
until the filler is proud of the transparency
surface. Leave the filler to cure.
Detailed in Figs. 3 and 4, step 2.
(8) Use a high-speed grinder to cut a groove
along the crack on the inner surface of the
transparency. Make sure that it cuts into the
first layer of filler.
Detailed in Fig. 3, step 3.
(9) On the inner surface, countersink the filler of
the temporary stop-drill holes to a depth of
approx. 1 mm (0.04 in).
Detailed in Fig. 4, step 3.
(10) Apply filler to the groove and stop-drill holes
until the filler is proud of the transparency
surface. Leave the filler to cure.
Detailed in Figs. 3 and 4, step 4.
(11) Remove the masking tape from the surfaces
of the canopy.
(12) Grind the filler to the contour of the
transparency surfaces and polish the repair
with the recommended transparency polish.
Detailed in Figs. 3 and 4, step 5.
(13) If protective covers were used, remove them
from the inside of the cockpit.
(14) If the canopy was removed for the repair,
install the canopy.
Refer to the Aircraft Maintenance Manual
Chapter 52-10.
Windows
DA20-C1 AMM
Page 4
30 Apr 2008 56-10-00 Doc # DA 201-C1
Rev. 13
No Cracks are permitted in the shaded area.
The maximum crack length is 150 mm (5.9 in).
Figure 2 – Crack Limits
DA20-C1 AMM
Windows
Doc # DA 201-C1
Rev. 13 56-10-00 Page 5
30 Apr 2008
Figure 3 – Crack Repairs
Windows
DA20-C1 AMM
Page 6
30 Apr 2008 56-10-00 Doc # DA 201-C1
Rev. 13
Figure 4 – Stop-Drill Hole Repair
DA20-C1 AMM
Windows
Doc # DA 201-C1
Rev. 15 56-11-00 Page 1
30 Apr 2009
CHAPTER 56-11
REPAIR OF THE REAR WINDOW
1. Damage Limits
The rear windows must be repaired when the crack is more than 51 mm (2.0 in) long and the
windows are damaged. Follow the following repair information or contact the aircraft manufacturer,
Diamond Aircraft Industries Canada for assistance.
2. Tools and Equipment
The following tools and equipment are required for the repair of the rear windows.
- High speed grinder
- Blade
- Drill
- Jigsaw
- Chisel.
3. Materials
The following materials are required for the repair of the cockpit transparency.
Items Quantity Part Number
Adhesive,
Methacrylate MA425
Loctite 495
A/R Commercial
Black paintable acrylic caulking
PF224, black sealant
A/R Commercial
Cleaner, Prekleeno 900 A/R Commercial
Masking tape low residue A/R Commercial
Sandpaper A/R Commercial
Tape Flash Braker I, II A/R Commercial
Windows
DA20-C1 AMM
Page 2
30 Apr 2009 56-11-00 Doc # DA 201-C1
Rev. 15
4. Repair of Rear Windows
Repair the rear windows as follows:
Detail Steps/Work Items Key Items
CAUTION: WEAR MASK AND EYE PROTECTION WHEN GRINDING OUT
EXISTING WINDOW. BE CAREFUL NOT TO DAMAGE THE
SURROUNDING COMPOSITE STRUCTURE.
(1) Tape fuselage around the window with 51 mm
(2 in) Tape Flash Braker II to protect the
fuselage paint from scratches.
(2) Drill a hole in the window close to the frame,
　
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