# Proposed AD 98-NM-312-AD: Cessna Model 560 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-03-09
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 10, 1999, 64 FR 49115
- Comments due: October 25, 1999
- Became: [AD 2000-03-09](https://openairdocs.org/ad/2000-03-09)
- Docket: 98-NM-312-AD
- FR document: 99-23620
- Official PDF: https://openairdocs.org/files/sha256/6c/0e/6c0e5406509483a759ae305f94b1c22f3c45489628dfab8372f700d74c2953f1 (from https://www.govinfo.gov/content/pkg/FR-1999-09-10/pdf/99-23620.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/09/10/99-23620/airworthiness-directives-cessna-model-560-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-312-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Cessna Model 560 series airplanes, that currently requires revising the FAA-approved Airplane Flight Manual (AFM) to provide the flightcrew with limitations, operational procedures, and performance information to be used during approach and landing when residual ice is present or can be expected. That action was prompted by reports indicating that, while operating in icing conditions or when ice is on the wings, some of these airplanes have experienced uncommanded roll at (or slightly higher than) the speed at which the stall warning system is activated. This action would require revising the AFM and would revise the applicability of the existing AD. This action also would require modification of the stall warning system of the angle-of-attack computer. The actions specified by the proposed AD are intended to prevent uncommanded roll of the airplane during approach and landing when residual ice is present or can be expected.

## Notices in this docket

- Sep 10, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-23620, comments due Oct 25, 1999 (https://www.federalregister.gov/documents/1999/09/10/99-23620/airworthiness-directives-cessna-model-560-series-airplanes)

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