# Proposed AD 98-NM-239-AD: Saab Model SAAB 2000 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-26-11
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 15, 1998, 63 FR 55346
- Comments due: November 16, 1998
- Became: [AD 98-26-11](https://openairdocs.org/ad/98-26-11)
- Docket: 98-NM-239-AD
- FR document: 98-27601
- Official PDF: https://openairdocs.org/files/sha256/0a/c0/0ac066fc849f20d07ad83607a6dbb98d396f1ada29e9eaf2d0c0788836fb5453 (from https://www.govinfo.gov/content/pkg/FR-1998-10-15/pdf/98-27601.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/10/15/98-27601/airworthiness-directives-saab-model-saab-2000-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-239-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Saab Model SAAB 2000 series airplanes. This proposal would require replacement of the end- pieces of the expansion chamber attenuator (ECA) for the standby pump of the Number 2 hydraulic system with new, improved end-pieces. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent leakage of hydraulic fluid from the Number 2 hydraulic system due to failure of the end-pieces of the ECA, which could result in loss of nose wheel steering, flap operation, normal landing gear operation, and reduced redundancy in the brake and flight controls systems.

## Notices in this docket

- Oct 15, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-27601, comments due Nov 16, 1998 (https://www.federalregister.gov/documents/1998/10/15/98-27601/airworthiness-directives-saab-model-saab-2000-series-airplanes)

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