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Monday, 14 March 2016 00:00

Archangel Awarded TSO for AHR75 AHRS

Archangel announces that it has received FAA TSO C201 approval to manufacture its newest product, the AHR75 Attitude Heading Reference System. The AHR75 AHRS is designed as a cost-effective primary source of attitude and heading data for both OEM production and after-market upgrades.

For OEMS, the principle benefits are budgets and pedigree. Size, weight, power, and price budgets are among the lowest in the industry. However, DO178C software certification is Level A - the highest level possible reserved for mission critical functions. TSO basis is the new C201, a much more stringent requirement for AHRS performance, particularly in rotorcraft.

In upgrade programs, the AHR75 addresses reliability and compatibility concerns head-on.  Mean time between failure is greater than 12,000 hours even in rotorcraft environments. And, all data inputs and outputs are per the ARINC 429 standard for AHRS, ensuring the greatest possible compatibility with existing avionics.

The FAA and EASA agree that all TSOs granted after March 2, 2016 apply bilaterally, so the AHR75 is certified in European aircraft as well.

AHR75 orders are being taken now with initial deliveries in late April. More information about the AHR75 and its potential value to you can be found at or by contacting Bill Dillard at This email address is being protected from spambots. You need JavaScript enabled to view it..