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OPERATING AND MAINTENANCE MANUAL FOR ULTRALIGHT AEROPLANE
5.
Repairs
5.1.
Damage classification
Various types of damage may occur during airplane operation and handling. It is important to
correctly classify damage according to its character , size and especially, which part of
airplane has been damaged.
The important parts are the engine, engine mount, propeller, wing spar center section of wing,
stabilizer, landing gear legs and parts of the primary control system.
Minor damage may be repaired by the airplane operator / owner, but major structural damage
should be repaired by replacement of damaged parts or repaired by an authorized service
center.
Any damage and its repair should be recorded in the Log Books.
5.2.
Rudder control cables replacement
Contact the airplane manufacturer for replacement procedure or an authorised Service Centre
to replace the cables.
5.3.
Fibreglass fairing and cowlings repairs
Cracks, breaks and permanent deformations are the most prevalent type of damage.
According to character of the damage the damage part should be cut out or sanded (bevel
approx. 20x material thickness ), any point of area to be repaired must be removed.
Put the first fibreglass cloth layer, then apply the resin L 285 mixed with the hardener H 286
(proportion of mixture 100:38) and continue as needed. The fibreglass cloth layers shout
have a short overlap.
After the resin has cured, sand the surface of repaired area, apply the polyester cement.
Sand the edges of repaired area (with 50-100 mm) using sand paper (grit size 400) to remove
the old paint and prepare the area for painting.
Cover the place to be not painted and spray the repaired area using T 35 two component
colour. Wet sand the area after paint curing using sand papers of 400, 800, 1200 grit size.
Apply polishing paste, use a soft cloth to polish the repaired area.
Document No:
Date of issue: 30.01.2008
UFM-13 Lambada
5-1
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