FAR 23.2545 — Pressurized Systems
FAR 23.2545 requires pressurized system elements on small airplanes to withstand appropriate proof and burst pressures. Key airworthiness standard explained.
FAR 23.2545 is a short but important airworthiness standard within Part 23, which governs the certification of normal category airplanes. It requires that any pressurized system elements installed on the aircraft be able to withstand appropriate proof and burst pressures.
In plain terms:
- A proof pressure test confirms the component can handle pressures above its normal operating limit without leaking or permanently deforming.
- A burst pressure test confirms the component will not rupture until well beyond its maximum expected operating pressure.
Why it matters operationally: pressurized systems on small airplanes — such as cabin pressurization, hydraulics, pneumatics, and oxygen systems — store significant energy. A failure could cause structural damage, injury, or loss of a critical system in flight. By requiring the manufacturer to demonstrate margins above normal operating pressure, this rule ensures pilots can rely on those systems throughout the airplane's operating envelope.