# Proposed AD FAA-2019-0582: Bombardier, Inc., Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-21-03
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 12, 2019, 84 FR 39778
- Comments due: September 26, 2019
- Became: [AD 2019-21-03](https://openairdocs.org/ad/2019-21-03)
- Docket: FAA-2019-0582 (https://www.regulations.gov/docket/FAA-2019-0582, where comments are filed)
- FR document: 2019-16808
- Official PDF: https://openairdocs.org/files/sha256/87/ee/87eed1f53fc1e1b83eadffee6cf7db2c715b78f0c58f8fff6264970bebd4b4a5 (from https://www.govinfo.gov/content/pkg/FR-2019-08-12/pdf/2019-16808.pdf)
- Federal Register: https://www.federalregister.gov/documents/2019/08/12/2019-16808/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/91700D84C43DE1F286258454005296E6.0001
- Page: https://openairdocs.org/proposed/FAA-2019-0582

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 (601), and CL-600-2B16 (601-3A and 601-3R Variants) airplanes. This proposed AD was prompted by reports of the loss of all air data system information provided to the flightcrew, which was caused by icing at high altitudes. This proposed AD would require revising the exisitng airplane flight manual (AFM) to provide the flightcrew with procedures for ``Unreliable Airspeed'' that stabilize the airplane's airspeed and attitude. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 12, 2019: Notice of proposed rulemaking (NPRM). (first notice), FR document 2019-16808, comments due Sep 26, 2019 (https://www.federalregister.gov/documents/2019/08/12/2019-16808/airworthiness-directives-bombardier-inc-airplanes)

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