# Proposed AD 2001-NM-90-AD: BAe Systems (Operations) Limited Model Avro 146-RJ Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-26-22
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 23, 2001, 66 FR 44311
- Comments due: September 24, 2001
- Became: [AD 2001-26-22](https://openairdocs.org/ad/2001-26-22)
- Docket: 2001-NM-90-AD
- FR document: 01-21226
- Official PDF: https://openairdocs.org/files/sha256/e2/35/e2350aa4c9c9bb7a4a4ffaa9282f83c2353c1ec313d2ab97110e8ea9f89ab0ec (from https://www.govinfo.gov/content/pkg/FR-2001-08-23/pdf/01-21226.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/08/23/01-21226/airworthiness-directives-bae-systems-operations-limited-model-avro-146-rj-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7BF10710F0D199FE86256AB20046D346.0001
- Page: https://openairdocs.org/proposed/2001-NM-90-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain BAe Systems (Operations) Limited Model Avro 146-RJ series airplanes. This proposal would require a one-time inspection of the S4 and S5 static pipes of the pitot static system for discrepancies, and follow-on corrective actions, if necessary. This action is necessary to prevent such discrepancies, which could result in holes in the static pipes, erroneous input to the instrumentation and warning systems associated with the pilot's instruments, and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Aug 23, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-21226, comments due Sep 24, 2001 (https://www.federalregister.gov/documents/2001/08/23/01-21226/airworthiness-directives-bae-systems-operations-limited-model-avro-146-rj-series-airplanes)

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