# Airworthiness Directives; Cessna Aircraft Company Airplanes
> **Rule** · Final rule. · Published 2015-08-25 · Effective 2015-09-29 · 80 FR 51443
## Document
- **Document number:** 2015-20692
- **Category:** airworthiness
- **Manufacturer:** Cessna
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 80 FR 51443
- **Publication date:** 2015-08-25
- **Effective date:** 2015-09-29
- **FAA docket:** Docket No. FAA-2014-1044
## Abstract

We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft Company Model 500, 501, 550, 551, S550, 560, and 650 airplanes. This AD was prompted by reports of smoke and/or fire in the tailcone caused by sparking due to excessive wear of the brushes in the air conditioning (A/C) motor. This AD requires inspections to determine if certain A/C compressor motors are installed and to determine the accumulated hours on certain A/C compressor motor assemblies; and repetitive replacement of the brushes in the A/C compressor motor assembly, or, as an option to the brush replacement, deactivation of the A/C system and placard installation; and return of replaced brushes to Cessna. We are issuing this AD to prevent the brushes in the A/C motor from wearing down beyond their limits, which could result in the rivet in the brush contacting the commutator, causing sparks and consequent fire and/or smoke in the tailcone with no means to detect or extinguish the fire and/or smoke.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2015/08/25/2015-20692/airworthiness-directives-cessna-aircraft-company-airplanes)
---
*AI Analytics · CC0 1.0*