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    • in the case of single acting propellers installed on piston engines: 1,500 hours air time or ten years, whichever comes first.

  • Fixed Pitch and Ground Adjustable Propellers - At intervals of not more than 5 years, the propeller shall be removed from the aircraft and inspected for corrosion or other defects over its entire surface, including the hub faces and the mounting hole bores. While the propeller is removed, it shall also be checked for correct dimensions. However, if defects which require repairs beyond those recommended as field repairs by the propeller manufacturer are found, the propeller shall be repaired by an organization approved for the overhaul of propellers.

  • Information Note:

The dimensional check requirement does not include a check on blade twist. The dimensional check refers to changes in blade dimension resulting from repairs, particularly cropping of the tips. It is intended to ensure that the blade diameter remains within service limits.

  • Engines

  • Information Note:

No hard time, including calendar time, between overhauls need be observed in the case of small aircraft reciprocating engines in non- commercial private operation.

  • Tachometers - The accuracy of mechanical drag cup type tachometers, for fixed wing propeller driven aircraft, shall be checked on site annually, and be accurate to within the tolerances established by the aircraft manufacturer or, where no tolerance has been specified by the aircraft manufacturer, to within +\- 4% of engine RPM at mid-point of the cruise range.

  • Non-stabilized Magnetic Direction Indicators (MDIs) - Non-stabilized magnetic direction indicators (wet compasses) shall be calibrated, and a dated correction card installed for each indicator, at intervals not exceeding 12 months;

  • Survival and Emergency Equipment - Survival and emergency equipment shall be overhauled at the intervals recommended by the manufacturer.

  • Emergency Locator Transmitters (ELTs) - Except where powered by water activated batteries, the ELT shall be checked at intervals not exceeding 12 months, in accordance with Appendix G of Chapter 571 of the Airworthiness Manual.

    • ELTs powered by water-activated batteries shall be performance-tested at intervals not exceeding 5 years.

COPA Guide to Certified Aircraft 39

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