# Proposed AD 99-NM-360-AD: Israel Aircraft Industries, Ltd., Model 1125 Westwind Astra and Astra SPX Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-10-19
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 24, 2000, 65 FR 3617
- Comments due: February 23, 2000
- Became: [AD 2000-10-19](https://openairdocs.org/ad/2000-10-19)
- Docket: 99-NM-360-AD
- FR document: 00-1598
- Official PDF: https://openairdocs.org/files/sha256/6a/67/6a67c8c3dbb006169637da87c635a133022cd3f1a68742475f4ca83e249b9e91 (from https://www.govinfo.gov/content/pkg/FR-2000-01-24/pdf/00-1598.pdf)
- Federal Register: https://www.federalregister.gov/documents/2000/01/24/00-1598/airworthiness-directives-israel-aircraft-industries-ltd-model-1125-westwind-astra-and-astra-spx
- Page: https://openairdocs.org/proposed/99-NM-360-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Israel Aircraft Industries, Ltd., Model 1125 Westwind Astra and Astra SPX series airplanes. This proposal would require replacement of the existing pneumatic de-icing boot pressure indicator switch with a newly designed switch. This proposal is prompted by an occurrence on a similar airplane model in which the pneumatic de-icing boot indication light may have provided the flightcrew with misleading information as to the proper functioning of the de-icing boots. The actions specified by the proposed AD are intended to prevent ice accumulation on the airplane leading edges, which could result in reduced controllability of the airplane.

## Notices in this docket

- Jan 24, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-1598, comments due Feb 23, 2000 (https://www.federalregister.gov/documents/2000/01/24/00-1598/airworthiness-directives-israel-aircraft-industries-ltd-model-1125-westwind-astra-and-astra-spx)

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