# Proposed AD FAA-2015-3140: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-02-05
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 31, 2015, 80 FR 45617
- Comments due: September 14, 2015
- Became: [AD 2016-02-05](https://openairdocs.org/ad/2016-02-05)
- Docket: FAA-2015-3140 (https://www.regulations.gov/docket/FAA-2015-3140, where comments are filed)
- Project: 2015-NM-063-AD
- FR document: 2015-18686
- Official PDF: https://openairdocs.org/files/sha256/f0/4f/f04f0740f86613eee5d40175f6d4ae0dbd2c88b076488eb6c580ba2b011a9a34 (from https://www.govinfo.gov/content/pkg/FR-2015-07-31/pdf/2015-18686.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/07/31/2015-18686/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B70F6EDA33FD3F5686257E930049827A.0001
- Page: https://openairdocs.org/proposed/FAA-2015-3140

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model BD-100-1A10 (Challenger 300) airplanes. This proposed AD was prompted by multiple reports of a short circuit between the heater element and the metal sheath of the pitot-static probe heater. This proposed AD would require replacement of the left and right pitot-static probes with newly redesigned left and right pitot-static probes. We are proposing this AD to prevent degradation of the heating ability of the pitot-static probe heater, resulting in erroneous airspeed indication during flight in icing conditions and consequent reduced controllability of the airplane.

## Notices in this docket

- Jul 31, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-18686, comments due Sep 14, 2015 (https://www.federalregister.gov/documents/2015/07/31/2015-18686/airworthiness-directives-bombardier-inc-airplanes)

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