United States Government Publishing Office publisher pbl distributor dst United States National Archives and Records Administration Office of the Federal Register author aut Government Organization text government publication eng FR Regulatory Information 2012_register executive 2012-09-26 article Proposed Rules D09002ee1c7fc6857 D09002ee1c7fc68d2 United States Department of Transportation originator org United States Government Agency or Subagency United States Federal Aviation Administration originator org United States Government Agency or Subagency We propose to adopt a new airworthiness directive (AD) for certain Cessna Aircraft Company Model 500, 501, 550, 551, S550, 560, 560XL, and 650 airplanes. This proposed AD was prompted by multiple 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 an inspection to determine the accumulated hours on certain A/C drive motor assemblies; repetitive replacement of the brushes in the drive motor assembly, or as an option to the brush replacement, deactivation of the air conditioner; 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. 77 FR 59146 https://www.govinfo.gov/app/details/FR-2012-09-26/2012-23639 2012-23639 fr26se12-24 RIN 2120-AA64 4910-13-P Docket No. FAA-2012-1001 Directorate Identifier 2012-NM-020-AD https://www.govinfo.gov/app/details/FR-2012-09-26/2012-23639 https://www.govinfo.gov/content/pkg/FR-2012-09-26/html/2012-23639.htm https://www.govinfo.gov/content/pkg/FR-2012-09-26/pdf/2012-23639.pdf Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety 4 p. 59146 59149 77 FR 59146 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Cessna Aircraft Company Airplanes; Federal Register Vol. 77, Issue PRORULE 2012-23639 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2012-11-13 Docket No. FAA-2012-1001 Directorate Identifier 2012-NM-020-AD 4910-13-P 2012-23639 Notice of proposed rulemaking (NPRM).

We propose to adopt a new airworthiness directive (AD) for certain Cessna Aircraft Company Model 500, 501, 550, 551, S550, 560, 560XL, and 650 airplanes. This proposed AD was prompted by multiple 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 an inspection to determine the accumulated hours on certain A/C drive motor assemblies; repetitive replacement of the brushes in the drive motor assembly, or as an option to the brush replacement, deactivation of the air conditioner; 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.

We must receive comments on this proposed AD by November 13, 2012. Christine Abraham, Aerospace Engineer, Electrical Systems and Avionics, ACE-119W, FAA, Wichita Aircraft Certification Office (ACO), 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; phone: 316-946-4165; fax: 316-946-4107; email: wichita-cos@faa.gov. Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety Airworthiness Directives: Cessna Aircraft Company Airplanes , citationpubs@cessna.textron.com wichita-cos@faa.gov http://www.regulations.gov https://www.cessnasupport.com/newlogin.html Vol. 77, no. 187 Office of the Federal Register, National Archives and Records Administration 2012-09-26 continuing daily deposited born digital 240 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-2012-09-26 P0b002ee1835abedf 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr26se12 https://www.govinfo.gov/app/details/FR-2012-09-26 https://www.govinfo.gov/content/pkg/FR-2012-09-26/pdf/FR-2012-09-26.pdf https://www.govinfo.gov/content/pkg/FR-2012-09-26/xml/FR-2012-09-26.xml fdlp 59045 59273 DGPO 2012-09-26 2024-06-03 FR-2012-09-26 machine generated eng FR FR-2012-09-26 77 187