Helicopter Fly-By-Wire Special Conditions (Skyryse R66)

Current understanding

The FAA is issuing special conditions for the Robinson R66 helicopter as modified by Skyryse to incorporate a four-axis full-authority digital fly-by-wire (FBW) flight control system, because Part 27 airworthiness standards — including static longitudinal stability requirements — do not adequately address this novel design feature. The special conditions establish an equivalent level of safety for FBW-specific behaviors on a civil rotorcraft, marking a regulatory first for FBW on a certificated helicopter. Status: FAA special conditions (final rule pathway).

Evidence log

• 2026-08-28 — Special Conditions: Skyryse, Robinson Helicopter Company Model R66 Helicopter; Control Margin Awareness: cross-connection with faa-fly-by-wire-helicopter-special-conditions: Both pages cover the same FAA rulemaking activity on Skyryse’s R66 fly-by-wire conversion; the Control Margin Awareness proposal is the latest special condition in that thread. (novelty: 2)
• 2026-02-24 — ROTOR Act: cross-connection with rotor-act: Both address rotorcraft safety oversight — the ROTOR Act through legislative mandates on surveillance and coordination, and the Skyryse R66 special conditions through certification of novel helicopter avionics. (novelty: 3)
• 2026-05-06 — Special Conditions: Skyryse, Robinson Helicopter Company Model R66 Helicopter; Static Longitudinal Stability: cross-connection with aircraft-cybersecurity-special-conditions: Both are FAA special conditions issued because existing airworthiness standards do not cover novel design features — one addressing FBW rotorcraft handling qualities, the other addressing avionics cybersecurity. (novelty: 3)

Open questions

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