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Special conditions

Special Conditions: Modified Cessna 550 Series Airplanes, High Intensity Radiated Fields (HIRF)

Special conditions are rules the FAA writes for one design when the standard certification rules do not cover something new about it. These were published January 3, 1995 for Modern Avionics INC.. System: instruments and avionics.

What it applies to

Applicant
Modern Avionics INC.
Makes
Cessna
Models
—
Published
January 3, 1995
Effective
December 19, 1994
The FAA's document
On the FAA's site

The FAA's summary their words, unchanged

These special conditions are issued for the Cessna 550 series airplanes modified by Modern Avionics, Inc., of Eden Prairie, Minnesota. These airplanes are equipped with digital electronic flight instrument systems (EFIS) that perform critical functions. The applicable type certification regulations do not contain adequate or appropriate safety standards for the protection of these systems from the effects of high intensity radiated fields (HIRF). These special conditions provide the additional safety standards that the Administrator considers necessary to ensure that the critical functions that these systems perform are maintained when the airplane is exposed to HIRF.

Source: FAA special conditions (final) from the Dynamic Regulatory System; the Federal Register carries the same notices.