# Special Condition: Boeing Model 747-200B, High-Intensity Radiated Fields
> **Rule** · Final special condition; request for comments. · Published 1997-03-11 · Effective 1997-02-12 · 62 FR 11072
## Document
- **Document number:** 97-5900
- **Category:** other
- **Type:** Rule
- **Action:** Final special condition; request for comments.
- **Citation:** 62 FR 11072
- **Publication date:** 1997-03-11
- **Effective date:** 1997-02-12
- **FAA docket:** Docket No. NM-137
## Abstract

This special condition is issued for the Boeing Model 747-200B airplanes. This airplane, as modified by ARINC Incorporated, utilizes new avionics/electronic systems, such as the electronic flight information systems (EFIS), which perform critical functions. The applicable regulations do not contain adequate or appropriate safety standards for the protection of these systems from the effects of high- intensity radiated fields (HIRF). This special condition contains the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/03/11/97-5900/special-condition-boeing-model-747-200b-high-intensity-radiated-fields)
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