# Proposed AD FAA-2020-0843: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-03-17
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 17, 2020, 85 FR 58010
- Comments due: November 2, 2020
- Became: [AD 2021-03-17](https://openairdocs.org/ad/2021-03-17)
- Docket: FAA-2020-0843 (https://www.regulations.gov/docket/FAA-2020-0843, where comments are filed)
- FR document: 2020-20373
- Official PDF: https://openairdocs.org/files/sha256/23/47/2347e595ac65a2ad60cb728b532b3900afc124e231e47a821e7d35ffeac36877 (from https://www.govinfo.gov/content/pkg/FR-2020-09-17/pdf/2020-20373.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/09/17/2020-20373/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/845ABAC0E9FC1515862585E600493245.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0843

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-700-1A10 airplanes. This proposed AD was prompted by a report of smoke and signs of an overheating condition from the emergency light battery (ELB) due to excessive corrosion surrounding the internal lead acid batteries, which caused an electrical short circuit that led to the smoke and overheating condition. This proposed AD would require an inspection to determine the last replacement date of the ELB, and replacement if necessary. This proposed AD would also require the incorporation of a new maintenance task into the aircraft maintenance schedule. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Sep 17, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-20373, comments due Nov 2, 2020 (https://www.federalregister.gov/documents/2020/09/17/2020-20373/airworthiness-directives-bombardier-inc-airplanes)

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