DOVA AIRCRAFT DV-1 SKYLARK, Руководство по обслуживанию

Страница: 44 / 78

Due to operating of aircraft, damage can easily happened. Seriousness of damage is given by concerned
parts, sort of damage, its size and frequency of incidence. Small repair can be done by owner, other only by
authorized service. All kind of damages and its repairs had to be written down to aircraft operational
documentation – see chapter 5
Materials used - duralumin 2024-T3
Thickness used: 2mm, 1,2mm, 1mm, 0,6 mm, 0,5 mm, 0,4 mm
Small cracks shorter than 5mm had to be stopped by drilling 1,5mm diameter hole placed at the tip-end of
the crack.
Small holes smaller diameter of 4mm can be blinded by rivet.
Small non-structural damage can be repaired by using a small frame and patch.
2
Frame and patch had to have same thickness as repaired skin. Patches smaller area then 50mm can be
fixed by single perimeter line of rivets. Greater on needs to have double perimeter line of rivets. Before
riveting the patch, all inner mating surfaces had to be painted. After riveting final paint can be used..
We suggest providing such repair in authorized service center.
Only small cracks and cranny of non-structural parts can be repaired by you According to type of the defect
– the damaged area is cut-out or just re-brushed. Paint in close area of repair had to be removed. In case of
using fiberglass patch – use 40-50mm oversized one. During overlying the patches, apply bonding
material at the same time. Two layers should be enough. For faster drying procedure, you can use warm
air from some air-heater. In case of greater surfaces, you need to underlay repaired area by shaped pad
covered with foil to avoid gluing. After drying, brush the surface, use filler if needed, and paint it.
Small repairs can be done by you.
In case of larger repair, following things had to be done:
- Weight of aircraft before and after repair
- leveling of aircraft geometry, re-setting deflections of control surfaces
- Inspection of tightening bolts, their securing, backlashes in controls system or in control
surfaces movement and inspection of electrical installation
- Engine’s test
- Flight test and solving of imperfection founded
CHAPTER 4 Repairs
4.1. GENERAL
4.2. METAL SKIN REPAIRS
4.3. RIVETING
4.4. FIBERGLASS PARTS
4.5. PAINT RENOVATION
4.6. ASSEMBLING AND ADJUSTMENT OF AIRCRAFT AFTER REPAIR
44