# Proposed AD 97-CE-51-AD: Partenavia Costruzioni Aeronauticas, S.p.A. Model P68, AP68TP 300, AP68TP 600 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-04-20
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 16, 1997, 62 FR 48524
- Comments due: October 14, 1997
- Became: [AD 98-04-20](https://openairdocs.org/ad/98-04-20)
- Docket: 97-CE-51-AD
- FR document: 97-24487
- Official PDF: https://openairdocs.org/files/sha256/1c/d5/1cd5d419c79b00f21e544a10458664d31c5777fe2b027fc3ce235acd44b9650f (from https://www.govinfo.gov/content/pkg/FR-1997-09-16/pdf/97-24487.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/09/16/97-24487/airworthiness-directives-partenavia-costruzioni-aeronauticas-spa-model-p68-ap68tp-300-ap68tp-600
- Page: https://openairdocs.org/proposed/97-CE-51-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Partenavia Costruzioni Aeronauticas, S.p.A. (Partenavia) Model P68, AP68TP 300, AP68TP 600 airplanes. This proposal would require revising the FAA-approved Airplane Flight Manual (AFM) to specify procedures that would prohibit flight in severe icing conditions (as determined by certain visual cues), limit or prohibit the use of various flight control devices while in severe icing conditions, and provide the flight crew with recognition cues for, and procedures for exiting from, severe icing conditions. The proposed AD is prompted by the results of a review of the requirements for certification of these airplanes in icing conditions, new information on the icing environment, and icing data provided currently to the flight crew. The actions specified by the proposed AD are intended to minimize the potential hazards associated with operating these airplanes in severe icing conditions by providing more clearly defined procedures and limitations associated with such conditions.

## Notices in this docket

- Sep 16, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-24487, comments due Oct 14, 1997 (https://www.federalregister.gov/documents/1997/09/16/97-24487/airworthiness-directives-partenavia-costruzioni-aeronauticas-spa-model-p68-ap68tp-300-ap68tp-600)

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