Forum for Enhanced Reliability and Maintainability Standards (FERMS)

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The Forum for Enhanced Reliability and Maintainability Standards (FERMS) provides a framework for measuring the reliability of business aircraft. Strict formulas and definitions describe these measures in terms of dispatch reliability and operational availability. By collecting aircraft maintenance information submitted by aircraft operators via the web, NBAA can present aircraft technical data based on these new, industry-standard definitions.

Operators can enter relevant maintenance events for their aircraft, tracking the number of flight hours and landings at the time of each event. Using this information, and the Dispatch Reliability and Operational Availability formulas developed by NBAA, operators can view compiled FERMS data for their individual aircraft, their fleet of aircraft by model, their entire fleet of aircraft, or the entire FERMS fleet for a specific model.

FERMS will do for quantifying aircraft reliability and maintainability what NBAA’s Range Formats (NBAA IFR reserves) do in standardizing aircraft performance.

FERMS Frequently Asked Questions

Review the the FERMS FAQ for more information about the formulas and data entry process.

For more information, contact NBAA's Eli Cotti at