IESI Standby Instrument

Reliable backup flight data for airliners, helicopters, and UAM.

Civil Aviation
Commercial aviation
Business aviation

Thales IESI (Integrated Electronic Standby Instrument) ensures accurate standby flight data with a compact, low-power, and highly reliable solution.

FORCES

Compact Safety Backup

Thales IESI delivers critical standby flight data attitude, altitude, and airspeed in one compact, integrated unit. Designed for airliners, helicopters, and UAM, it ensures cockpit safety with minimal space and power requirements.
Proven & Certified Design

Fully compliant with DO-254 and DO-178 B DAL B, Thales standby was the very first certified solution of its kind. With 40,000+ systems in operation and over 250 million flight hours, it sets the standard for reliable backup instrumentation.
Low Power, High Clarity

Featuring low-power LCD tech and LED backlighting, Thales IESI ensures crisp, clear readability in all conditions while reducing consumption and supporting sustainable aviation system design.

Advanced Standby Flight Instrument

Stand-by equipment is an emergency feature used in the event of primary flight instrument failure. Because such equipment is obligatory under Instrument Flight Rules (IFR) and most helicopters are still equipped with standard (non-electronic) instruments, the market for IESI is significant.

Thales IESI integrates essential standby flight data attitude, altitude, and airspeed into a compact, self-contained unit, ensuring backup safety for airliners, helicopters, and urban air mobility aircraft.

As a standby instrument pioneer, Thales leads the industry in reliability. Fully compliant with DO-254 and DO-178 B DAL B standards, it sets the benchmark for safety and efficiency, ensuring optimal aircraft backup instrumentation with low maintenance costs.