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Maintenance Manual V001
FRECCIA
6. REPARATIONS
Any repair or modification of the airplane design may only be performed by authorized personnel.
Note: prior to any modification or reparation of the airplane, consult with and obtain writ-
ten approvement by the manufacturer, that the intended modification will not negatively
affect the airworthiness of the airplane.
After completing the modification, according to the instructions given in the Airplane Mainte-
nance Manual, the aircraft should be re-weighed, and the respective weighing report sheet com-
pleted and the Weight and Balance schedule of this manual must be revised.
For every reparation consult with manufacturer to have the lamination and reparation plan, show-
ing picture of the damage.
6.1. MAIN WHEELS' ASSEMBLAGE AND DISASSEMBLAGE
As for the main wheels 'assemblage and disassembling, at first remove the wheels mudgu-
ards. Then:
1 Put a jack under the iron tools which secure the undercarriage to the fuselage and jack the
wheel up
2 Unhook and unscrew the spacer on the wheel axle-shaft
3 Remove the wheel from the axle-shaft
4 Wash the bearings with gasoline and dry by blowing air
5 Check the bearings to found out eventual damages or corrosions. In case of need, replace
them
6 After the check-up, grease the bearings
7 The assemblage and the disassemblage of the wheel and of its fairing follow the reverse
order with regard to the disassemblage.
8 Then pump the braking circuit.
PUMPING OF BRAKING CIRCUIT
The pumping of braking circuit needs two operators:
1 First of all, install a PVC tube on the relief valve, cleaned from dust and incrustations.
2 The other edge of that tube must be dipped in a container to recover the brake fluid.
3 An operator puts on the brake lever and keeps it locked in "brake" position until the end.
The other operator, following the order of the first one, unscrews the valve of two turns and
checks the flowing of air bubbles from the braking circuit.
4 In this way, the first operator causes the overflow of air bubbles until the stop and asks the
second operator for screwing well the valve. Then he releases the brake lever.
5 Repeat this operation until the air bubbles stop overflowing from the PVC tube.
6 In the pumping of braking circuit, see the fluid level in the expansion container and, in case
of need, fill up to not allow the level to go under a minimum and to avoid the air penetrati-
on in the circuit.
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6.2. REPLACEMENT OF BRAKES' PADS
As for the replacement of brakes' pads and of brakes' discs, follow these steps:
1 Remove the wheel
1 Disconnect the wheel from the brake disc and from the support
2 Dismantle the calliper
3 Replace the brakes' pads in the support and the brake discs, when they are worn out.
6.3. REPLACEMENT OF THE MAIN WHEEL 'S TYRE
To replace the tyre:
1 Empty the air from the tyre
2 Remove the tyre from the rim
3 Push the valve in the rim hole and remove the inner tube (if it's present)
4 Check the rim, clean it
5 Dry-clean the internal surface of the tyre
6 Put the tyre again (with the eventual inner tube) in the rim
7 Inflate the tyre till the adequate pressure (2,0-2,2 kgf/cm², approximately 2 bar).
6.4. MATERIALS USED IN MANUFACTURING PROCESS
Composite parts are made of (usable for small repairs):
Carbon fibre
200 g/m2 Plain
Glass fibre
300 g/m2 Twill; 200 g/m2 Plain; 160 g/m2 Twill; 80 g/m2 Plain
Foam
60 kg/m3 PVC 3 mm, 5 mm, 10 mm, 15 mm, 25 mm
Resin
Epoxy resin
Filler for bonding
Microfibres; cab-o-sil; glass boubble
Paint
Gelcoat
Heat resistant protection
Glass-aluminium-stainless steel sandwich
All parts are made in moulds, therefore no shape or structural differences can occur.
Maintenance Manual V001
FRECCIA
Seite 45
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