# Airworthiness Directives; Bombardier, Inc., Airplanes
> **Rule** · Final rule. · Published 2018-07-09 · Effective 2018-08-13 · 83 FR 31648
## Document
- **Document number:** 2018-14500
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 31648
- **Publication date:** 2018-07-09
- **Effective date:** 2018-08-13
- **FAA docket:** Docket No. FAA-2018-0274
## Abstract

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by reports of fire incidents of the auxiliary power unit (APU) inlet, which caused tail cone damage after an initial failed APU start followed by two or more in-flight APU start attempts. This AD requires modification of the APU electronic control unit (ECU) wiring harness. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/07/09/2018-14500/airworthiness-directives-bombardier-inc-airplanes)
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