# Proposed AD 97-CE-83-AD: HOAC-Austria Model DV 20 Katana Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-24-05
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 25, 1998, 63 FR 45189
- Comments due: September 21, 1998
- Became: [AD 98-24-05](https://openairdocs.org/ad/98-24-05)
- Docket: 97-CE-83-AD
- FR document: 98-22701
- Official PDF: https://openairdocs.org/files/sha256/b4/71/b471e4d91d0515fd29d05e58db93e9dc327014e69d3dc22c2ca39366041fa782 (from https://www.govinfo.gov/content/pkg/FR-1998-08-25/pdf/98-22701.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/08/25/98-22701/airworthiness-directives-hoac-austria-model-dv-20-katana-airplanes
- Page: https://openairdocs.org/proposed/97-CE-83-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to certain HOAC-Austria (HOAC) Model DV 20 airplanes equipped with ROTAX 912 A3 engines. The proposed action would require replacing the engine electronic modules. The proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Austria. The actions specified by the proposed AD are intended to prevent electromagnetic interference (EMI) on the engine electronic module, which could cause the airplane engine to stop due to the interruption of the airplane's ignition system and result in loss of control of the airplane.

## Notices in this docket

- Aug 25, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-22701, comments due Sep 21, 1998 (https://www.federalregister.gov/documents/1998/08/25/98-22701/airworthiness-directives-hoac-austria-model-dv-20-katana-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.