AD 2020-03-50

The FAA is adopting a new airworthiness directive (AD) for certain Cirrus Design Corporation (Cirrus) Model SF-50 airplanes. This AD was sent previously as an emergency AD to all known U.S. owners and operators of these airplanes. This AD requires disconnecting and removing the headset amplifier and microphone interface circuit card assemblies for the 3.5 mm audio and microphone jacks. This AD was prompted by a cabin fire incident that occurred on a Cirrus Model SF50 airplane during ground operations where the operator observed smoke exiting from behind the right sidewall interior panel. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective June 11, 2020 to all persons except those persons to whom it was made immediately effective by Emergency AD 2020- 03-50, issued on February 14, 2020, which contained the requirements of this amendment.

Final rule; request for comments.

Adoption of the Amendment \n\n\n\tAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n0 1. The authority citation for part 39 continues to read as follows: \n\n\n\tAuthority: 49 U.S.C. 106(g), 40113, 44701. \n\n\n\nSec. 39.13 (Amended) \n\n0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive: \n\n2020-03-50 Cirrus Design Corporation: Amendment 39-21137; Docket No. FAA-2020-0546; Project Identifier 2020-CE-001-AD. \n\n(a) Effective Date \n\n\n\tThis airworthiness directive (AD) is effective June 11, 2020 to all persons except those persons to whom it was made immediately effective by Emergency AD 2020-03-50, issued on February 14, 2020, which contained the requirements of this amendment. \n\n(b) Affected ADs \n\n\n\tNone. \n\n(c) Applicability \n\n\n\tThis AD applies to Cirrus Design Corporation (Cirrus) Model SF50 airplanes, serial numbers 0005 through 0176 and 0178, certificated in any category. \n\n(d) Subject \n\n\n\tJoint Aircraft System Component (JASC)/Air Transport Association (ATA) of America Code Joint Aircraft System Component (JASC)/Air Transport Association (ATA) of America Code 23; Communications. \n\n(e) Unsafe Condition \n\n\n\tThis AD was prompted by a cabin fire incident that occurred on a Cirrus Model SF50 airplane during ground operations. The investigation into the incident determined the probable root cause was a malfunction of the headset amplifier (part number (P/N) 38849- 001) and the microphone interface (P/N 35809-001) circuit card assemblies for the 3.5 millimeter (mm) audio and microphone jacks. The FAA is issuing this AD to prevent an electrical short and subsequent uncontained cabin fire, which could result in occupant injury or loss of airplane control. \n\n(f) Compliance \n\n\n\tComply with this AD within the compliance times specified, unless already done. \n\n(g) Corrective Action \n\n\n\tBefore further flight, disconnect and remove the headset amplifier and microphone interface circuit card assemblies by following the Accomplishment Instructions, steps A. and G. through K., of \n\n((Page 35555)) \n\nCirrus Alert Service Bulletin Number SBA5X-23-03, dated February 7, 2020. \n\n(h) Special Flight Permit \n\n\n\tSpecial flight permits are prohibited. \n\n(i) Alternative Methods of Compliance (AMOCs) \n\n\n\t(1) The Manager, Chicago ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (j) of this AD. \n\t(2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. \n\n(j) Related Information \n\n\n\tFor more information about this AD, contact Joe Dubusky, Aerospace Engineer, Chicago ACO Branch, FAA, 2300 E. Devon Ave., Des Plaines, IL 60018; phone: 847-294-7543; fax: 847-294-7834; email: joseph.dubusky@faa.gov. \n\n(k) Material Incorporated by Reference \n\n\n\t(1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. \n\t(2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. \n\t(i) Cirrus Alert Service Bulletin Number SBA5X-23-03, dated February 7, 2020. \n\t(ii) (Reserved) \n\t(3) For the service information identified in this AD, contact Cirrus Design Corporation, Cirrus Design Corporation; 4515 Taylor Circle Duluth, MN 55811; phone: (800) 279-4322; email: info@cirrusaircraft.com; internet: https://cirrusaircraft.com. \n\t(4) You may view the referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the FAA, call (816) 329-4148. \n\t(5) You may view the service information that is incorporated by reference at the National Archives and Records Administration (NARA). For more information on the availability of this material at NARA, email: fedreg.legal@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. \n\n\n\tIssued on May 28, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2020-12498 Filed 6-10-20; 8:45 am) \n\tBILLING CODE 4910-13-P

Discussion \n\n\n\tOn February 14, 2020, the FAA issued Emergency AD 2020-03-05, which requires disconnecting and removing the headset amplifier and microphone interface circuit card assemblies. This emergency AD was sent previously to all known U.S. owners and operators of these airplanes. This action was prompted by a cabin fire incident that occurred on a Cirrus Model SF50 airplane during ground operations. The operator observed smoke exiting from behind the right sidewall interior panel located behind crew seat 2 and forward of passenger seat 5. The investigation into the incident determined the probable root cause was a malfunction of the headset amplifier (part number (P/N) 38849-001) and the microphone interface (P/N 35809-001) circuit card assemblies for the 3.5 millimeter (mm) audio and microphone jacks. This malfunction can result in an electrical short and subsequent uncontained cabin fire without activating circuit protection. \n\tThis condition, if not addressed, could lead to an uncontained cabin fire, resulting in possible occupant injury or loss of airplane control. \n\nRelated Service Information Under 1 CFR Part 51 \n\n\n\tThe FAA reviewed Cirrus Alert Service Bulletin Number SBA5X-23-03, dated February 7, 2020 (SBA5X-23-03). The service information contains instructions to disconnect and remove the headset amplifier and microphone interface circuit card assemblies for the 3.5 mm audio and microphone jacks. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. \n\nFAA's Determination \n\n\n\tThe FAA is issuing this AD because it evaluated all the relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. \n\nAD Requirements \n\n\n\tThis AD requires accomplishing the actions specified in SBA5X-23-03as described previously. \n\nFAA's Justification and Determination of the Effective Date \n\n\n\tAn unsafe condition exists that required the immediate adoption of Emergency AD 2020-03-50, issued on February 14, 2020, to all known U.S. owners and operators of these airplanes. The FAA found that the risk to the flying public justified waiving notice and comment prior to adoption of this rule because immediate corrective action was necessary to prevent an electrical short and subsequent uncontained cabin fire, which could result in occupant injury or loss of airplane control. These conditions still exist and the AD is hereby published in the Federal Register as an amendment to section 39.13 of the Federal Aviation Regulations (14 CFR 39.13) to make it effective to all persons. Therefore, the FAA finds good cause that notice and \n\n((Page 35554)) \n\nopportunity for prior public comment are impracticable. In addition, for the reasons stated above, the FAA finds that good cause exists formaking this amendment effective in less than 30 days. \n\nComments Invited \n\n\n\tThis AD is a final rule that involves requirements affecting flight safety and was not preceded by notice and an opportunity for public comment. However, the FAA invites you to send any written data, views, or arguments about this final rule. Send your comments to an address listed under the ADDRESSES section. Include Docket Number FAA-2020-0546 and Project Identifier 2020-CE-001-AD at the beginning of your comments. The FAA specifically invites comments on the overall regulatory, economic, environmental, and energy aspects of this final rule. The FAA will consider all comments received by the closing date and may amend this final rule because of those comments. \n\tThe FAA will post all comments the FAA receives, without change, to https://www.regulations.gov, including any personal information you provide. The FAA will also post a report summarizing each substantive verbal contact that is received aboutthis final rule. \n\nCosts of Compliance \n\n\n\tThe FAA estimates that this AD affects 173 airplanes of U.S. registry. \n\tThe FAA estimates the following costs to comply with this AD: \n\n\n\tEstimated Costs ---------------------------------------------------------------------------------------------------------------- \n\tCost per Cost on U.S. \n\tAction Labor cost Parts cost product operators ---------------------------------------------------------------------------------------------------------------- Remove audio and microphone circuit 6 work-hours x $85 per N/A $510 $88,230 \n\tcards. hour = $510. ---------------------------------------------------------------------------------------------------------------- \n\n\n\tAccording to the manufacturer, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. The FAA does control warranty coverage for affected individuals. As a result, the FAA has included all costs in its cost estimate. \n\nAuthority for This Rulemaking \n\n\n\tTitle 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. Subtitle VII: Aviation Programs describes in more detail the scope of the Agency's authority. \n\tThe FAA is issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: General requirements. Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.Regulatory Flexibility Act \n\n\n\tThe requirements of the Regulatory Flexibility Act (RFA) do not apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt a rule without prior notice and comment. Because FAA has determined that it has good cause to adopt this rule without notice and comment, RFA analysis is not required. \n\nRegulatory Findings \n\n\n\tThis AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. \n\tFor the reasons discussed above, I certify that this AD: \n\t(1) Is not a ''significant regulatory action'' under Executive Order 12866, and \n\t(2) Will not affect intrastate aviation in Alaska. \n\nList of Subjects in 14 CFR Part 39 \n\n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.