# Proposed AD FAA-2022-1152: BAE Systems (Operations) Limited Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2023-02-16
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 16, 2022, 87 FR 68644
- Comments due: January 3, 2023
- Became: [AD 2023-02-16](https://openairdocs.org/ad/2023-02-16)
- Docket: FAA-2022-1152 (https://www.regulations.gov/docket/FAA-2022-1152, where comments are filed)
- Project: MCAI-2022-00260-T
- FR document: 2022-24840
- Official PDF: https://openairdocs.org/files/sha256/28/d2/28d21287156fc79b897303325d04170580e2dd4f12766c8a7d16ca7cefc02075 (from https://www.govinfo.gov/content/pkg/FR-2022-11-16/pdf/2022-24840.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/11/16/2022-24840/airworthiness-directives-bae-systems-operations-limited-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-24840-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-1152

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain BAE Systems (Operations) Limited Model Avro 146-RJ series airplanes. This proposed AD was prompted by a report that certain inertial reference units (IRUs) have out-of-date magnetic variation (MagVar) tables. This proposed AD would require assessing the values between the MagVar tables of the affected IRUs and the most recently published MagVar data tables, and corrective actions if necessary. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 16, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-24840, comments due Jan 3, 2023 (https://www.federalregister.gov/documents/2022/11/16/2022-24840/airworthiness-directives-bae-systems-operations-limited-airplanes)

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