How much should it cost for maintenance for a cessna 172 assuming 100 hours per annum?

Depending on the condition but generally a 100 hour / annual inspection takes 14-16 man hours plus defects found. Approximate charge out rates are between $65-75.00 + GST per hour. ARA logbook inspection cost approximately $250.00 + GST.

The bi-annual avionics inspections can cost $150-350.00 + GST plus defects. More.

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