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4. MAINTENANCE
4.1. GENERAL
Apart from the consequences of heavy landing, or of exceeding flight limitations, the major factors for
attention are corrosion, fatigue and UV light. There are no inherent fatigue problem with the Quik or Quik
GT450, but excessive loads and vibration can weaken the structure, and a regular watch for hair-line cracks,
most likely in areas under high stress, such as around bolt holes, should be carried out. All components can
be replaced without difficulty. Repairs should be undertaken by a P&M Aviation Ltd. approved repair agency.
Aluminium Tubework
Care and consideration in de-rigging and transportation will pay huge dividends in airframe life. Any damage
to any one of the structural members is serious and can usually only be repaired by replacement. Tubes
suffer from abrasion or indentation, the first accelerating fatigue fracture and the second reducing the
strength of the part. If you bend, dent or damage the tubular members in any way, seek immediate
professional advice before flying again and have replacement parts fitted. See inspection schedule 12.5. xxx
Fasteners
Only fasteners purchased from P&M Aviation Ltd either direct or through an Approved Stockist should be
used for replacement. Any fastener which is bent or shows sign of wear or corrosion should be immediately
replaced.
Rigging Cables
The main danger with the rigging lies in kinking the cable, usually caused by careless rigging and de-rigging.
Once a cable has a kink, the strands are damaged and replacement is the only cure. The side cables are
particularly important and should receive a frequent detailed inspection. Check for cable damage along the
length but the main failure area lies immediately adjacent to the swaged fitting. Look carefully for signs of
strand fracture at this position. Corrosion is a serious problem particularly in coastal areas and shows itself
as a white powdery deposit.
replacement cables supplied by P&M Aviation should be used.
Fittings
Many fittings on P&M aircraft are manufactured from aluminium alloy and then anodised. Damage can occur
through scratching or by the stress of an unduly heavy landing or crash, or by general wear. Look for
elongated holes and stress lines in the aluminium. Damaged items should be replaced.
Quik & Quik GT450 Maintenance Manual
th
29
March 2007
Issue 1
WARNING
!
Never fly an aircraft with dented or damaged
components.
WARNING
!
Nyloc nuts should only be used once. Re-using
worn nyloc nuts could cause structural failure,
injury or death.
Corrosion cannot be cured and replacement is the only answer. Only
WARNING
!
Kinked, corroded or damaged cables should be
changed at once with new factory supplied
items. Flying with damaged cables could cause
structural failure, resulting in injury or death.
Page 19 of 54
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