# Proposed AD 97-NM-104-AD: British Aerospace BAe Model ATP Airplanes and Model HS 748 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-25-13
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 20, 1997, 62 FR 44244
- Comments due: September 29, 1997
- Became: [AD 97-25-13](https://openairdocs.org/ad/97-25-13)
- Docket: 97-NM-104-AD
- FR document: 97-21983
- Official PDF: https://openairdocs.org/files/sha256/80/6c/806c457484ed44515cb3e6f776000c63370ad6cc7bf97a27fbbfcbef24389687 (from https://www.govinfo.gov/content/pkg/FR-1997-08-20/pdf/97-21983.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/08/20/97-21983/airworthiness-directives-british-aerospace-bae-model-atp-airplanes-and-model-hs-748-series-airplanes
- Page: https://openairdocs.org/proposed/97-NM-104-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain British Aerospace BAe Model ATP airplanes and all Model HS 748 series airplanes. This proposal would require inspection of the main hydraulic accumulator for corrosion, and corrective actions, if necessary. 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 detect and correct such corrosion, which could result in loss of certain hydraulic system functions, including nose wheel steering, hydraulic lowering of the landing gear, and main wheel brakes, which are essential for safe operation of the airplane.

## Notices in this docket

- Aug 20, 1997: Notice of proposed rulemaking (NPRM). (first notice), FR document 97-21983, comments due Sep 29, 1997 (https://www.federalregister.gov/documents/1997/08/20/97-21983/airworthiness-directives-british-aerospace-bae-model-atp-airplanes-and-model-hs-748-series-airplanes)

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