# Proposed AD FAA-2014-1044: Cessna Aircraft Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-17-12
- Products: Cessna
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 23, 2015, 80 FR 3516
- Comments due: March 9, 2015
- Became: [AD 2015-17-12](https://openairdocs.org/ad/2015-17-12)
- Docket: FAA-2014-1044 (https://www.regulations.gov/docket/FAA-2014-1044, where comments are filed)
- Project: 2014-NM-148-AD
- FR document: 2015-00994
- Official PDF: https://openairdocs.org/files/sha256/42/00/42009cfcdcfcc9844cdde36c259f21cb7f9ba28ca6889a59f268e796942c2e0b (from https://www.govinfo.gov/content/pkg/FR-2015-01-23/pdf/2015-00994.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/01/23/2015-00994/airworthiness-directives-cessna-aircraft-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1AD0D86591D598AC86257DD6004DD2D1.0001
- Page: https://openairdocs.org/proposed/FAA-2014-1044

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Cessna Aircraft Company Model 500, 501, 550, 551, S550, 560, and 650 airplanes. This proposed 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 proposed AD would require 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 proposing 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.

## Notices in this docket

- Jan 23, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-00994, comments due Mar 9, 2015 (https://www.federalregister.gov/documents/2015/01/23/2015-00994/airworthiness-directives-cessna-aircraft-company-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.