# Proposed AD 98-NM-63-AD: Saab Model SAAB 2000 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-20-02
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 21, 1998, 63 FR 19675
- Comments due: May 21, 1998
- Became: [AD 98-20-02](https://openairdocs.org/ad/98-20-02)
- Docket: 98-NM-63-AD
- FR document: 98-10473
- Official PDF: https://openairdocs.org/files/sha256/5e/d9/5ed9a6e60e2299d885556420a6804604377365d85b7bc7fd83b203788cf16307 (from https://www.govinfo.gov/content/pkg/FR-1998-04-21/pdf/98-10473.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/04/21/98-10473/airworthiness-directives-saab-model-saab-2000-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-63-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 repetitive inspections to detect chafing of the hydraulic pipe on the emergency uplock release system of the main landing gear (MLG); testing of the hydraulic pipe for leaks, if necessary; and repair of the hydraulic pipe, if necessary. This proposal also would require modification of the attachment bolt and attachment hole on the structural panel, which would terminate the repetitive inspection requirements of this AD. 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 chafing between the hydraulic pipe on the emergency uplock release system of the MLG and an attachment bolt on a structural panel, which could result in rupture of the hydraulic pipe, loss of hydraulic pressure, and consequent inability to activate the emergency MLG extension.

## Notices in this docket

- Apr 21, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-10473, comments due May 21, 1998 (https://www.federalregister.gov/documents/1998/04/21/98-10473/airworthiness-directives-saab-model-saab-2000-series-airplanes)

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