# Proposed AD FAA-2005-20078: BAE Systems (Operations) Limited Model Avro 146-RJ Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-08-16
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 19, 2005, 70 FR 2987
- Comments due: February 18, 2005
- Became: [AD 2005-08-16](https://openairdocs.org/ad/2005-08-16)
- Docket: FAA-2005-20078 (https://www.regulations.gov/docket/FAA-2005-20078, where comments are filed)
- Project: 2004-NM-210-AD
- FR document: 05-994
- Official PDF: https://openairdocs.org/files/sha256/b6/4a/b64a7a2fea7d29f7439bd164800f58bb18596835185beff5fdb3a31f2501c4da (from https://www.govinfo.gov/content/pkg/FR-2005-01-19/pdf/05-994.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/01/19/05-994/airworthiness-directives-bae-systems-operations-limited-model-avro-146-rj-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AB3DD9B5CAB3A49186256F8E00673BAE.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20078

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all BAE Systems (Operations) Limited Model Avro 146-RJ series airplanes. This proposed AD would require an inspection of the Thales Avionics distance bearing indicator (DBI) to determine part number (P/N) and serial number (S/N), and replacement of the affected DBI with a new or modified DBI. This proposed AD is prompted by a report of defective electrical insulators in DBIs. We are proposing this AD to prevent a short circuit in the DBI due to defective electrical insulation, which could potentially cause a loss of primary navigation instruments (such as airspeed indicator, altimeter, and global positioning system (GPS) information).

## Notices in this docket

- Jan 19, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-994, comments due Feb 18, 2005 (https://www.federalregister.gov/documents/2005/01/19/05-994/airworthiness-directives-bae-systems-operations-limited-model-avro-146-rj-series-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.