# Special Conditions; Beechcraft Model E90 Airplane
> **Rule** · Final special conditions; request for comments. · Published 1997-02-21 · 62 FR 7922
## Document
- **Document number:** 97-4354
- **Category:** other
- **Type:** Rule
- **Action:** Final special conditions; request for comments.
- **Citation:** 62 FR 7922
- **Publication date:** 1997-02-21
- **FAA docket:** Docket No. 139CE, Special Condition 23-ACE-90
## Abstract

These special conditions are issued to East Coast Aerospace Engineering, 2601 N. Flagler Dr., W. Palm Beach, FL 33407 for a Supplemental Type Certificate (STC) on Beechcraft Model E90 airplane. This airplane will have novel and unusual design features when compared to the state of technology envisaged in the applicable airworthiness standards. These novel and unusual design features include the installation of electronic displays for which the applicable regulations do not contain adequate or appropriate airworthiness standards for the protection of these systems from the effects of high intensity radiated fields (HIRF). These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to the airworthiness standards applicable to these airplanes.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/02/21/97-4354/special-conditions-beechcraft-model-e90-airplane)
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