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(h) Installation Prohibition DEPARTMENT OF TRANSPORTATION Office (telephone 800–647–5527) is in After the effective date of this AD, do not the ADDRESSES section. Comments will install any software standard earlier than Federal Aviation Administration be available in the AD docket shortly SCN 5B/I into any EEC. after receipt. 14 CFR Part 39 For service information identified in (i) Definition [Docket No. FAA–2016–6968; Directorate this proposed AD, contact Sikorsky For the purpose of this AD, an ‘‘engine Identifier 2015–SW–020–AD] Aircraft Corporation, Customer Service shop visit’’ is the induction of an engine into Engineering, 124 Quarry Road, the shop for maintenance involving the RIN 2120–AA64 Trumbull, CT 06611; telephone 1–800– separation of any major mating flange, except Winged–S or 203–416–4299; email wcs_ Airworthiness Directives; Sikorsky that the separation of engine flanges solely [email protected]. You Aircraft Corporation Helicopters (Type for the purposes of transportation without may review the referenced service Certificate Previously Held by subsequent maintenance does not constitute information at the FAA, Office of the Schweizer Aircraft Corporation) an engine shop visit. Regional Counsel, Southwest Region, (j) Alternative Methods of Compliance AGENCY: Federal Aviation 10101 Hillwood Pkwy., Room 6N–321, (AMOCs) Administration (FAA), DOT. Fort Worth, TX 76177. (1) The Manager, Engine Certification ACTION: Notice of proposed rulemaking FOR FURTHER INFORMATION CONTACT: Office, FAA, may approve AMOCs for this (NPRM). Blaine Williams, Aerospace Engineer, AD. Use the procedures found in 14 CFR Boston Aircraft Certification Office, SUMMARY: We propose to supersede 39.19 to make your request. You may email Engine & Propeller Directorate, 1200 your request to: ANE–AD–[email protected]. airworthiness directive (AD) 93–17–13 District Avenue, Burlington, (2) Before using any approved AMOC, for Schweizer Aircraft Corporation and Massachusetts 01803; telephone (781) notify your appropriate principal inspector, Hughes Helicopters, Inc. (now Sikorsky 238–7161; email blaine.williams@ or lacking a principal inspector, the manager Aircraft Corporation) (Sikorsky) Model faa.gov. TH55A, 269A, 269A–1, 269B, and 269C of the local flight standards district office/ SUPPLEMENTARY INFORMATION: certificate holding district office. helicopters. AD 93–17–13 requires installing tachometer markings and Comments Invited (k) Related Information inspecting the driveshaft. This proposed We invite you to participate in this (1) For more information about this AD, AD would require recurring inspections rulemaking by submitting written contact Kevin Clark, Aerospace Engineer, of the driveshaft and would expand the comments, data, or views. We also Engine Certification Office, FAA, Engine & applicability to include Model 269C–1 invite comments relating to the Propeller Directorate, 1200 District Avenue, helicopters. This proposed AD is economic, environmental, energy, or Burlington, MA 01803; phone: 781–238– prompted by reports of accidents federalism impacts that might result 7088; fax: 781–238–7199; email: because of driveshaft failures. The from adopting the proposals in this [email protected]. actions of this proposed AD are document. The most helpful comments (2) PW Alert Service Bulletin PW2000 intended to prevent the unsafe reference a specific portion of the A73–170, dated July 14, 2016, can be condition on these products. proposal, explain the reason for any obtained from PW using the contact DATES: We must receive comments on recommended change, and include information in paragraph (k)(3) of this AD. this proposed AD by March 6, 2017. supporting data. To ensure the docket (3) For service information identified in ADDRESSES: You may send comments by does not contain duplicate comments, this AD, contact Pratt & Whitney Division, any of the following methods: commenters should send only one copy 400 Main St., East Hartford, CT 06118; • phone: 800–565–0140; fax: 860–565–5442. Federal eRulemaking Docket: Go to of written comments, or if comments are (4) You may view this referenced service http://www.regulations.gov. Follow the filed electronically, commenters should information at the FAA, Engine & Propeller online instructions for sending your submit only one time. Directorate, 1200 District Avenue, comments electronically. We will file in the docket all • Fax: 202–493–2251. comments that we receive, as well as a Burlington, MA. For information on the • availability of this material at the FAA, call Mail: Send comments to the U.S. report summarizing each substantive 781–238–7125. Department of Transportation, Docket public contact with FAA personnel Operations, M–30, West Building concerning this proposed rulemaking. Issued in Burlington, Massachusetts, on Ground Floor, Room W12–140, 1200 Before acting on this proposal, we will December 28, 2016. New Jersey Avenue SE., Washington, consider all comments we receive on or Colleen M. D’Alessandro, DC 20590–0001. before the closing date for comments. Manager, Engine & Propeller Directorate, • Hand Delivery: Deliver to the We will consider comments filed after Aircraft Certification Service. ‘‘Mail’’ address between 9 a.m. and 5 the comment period has closed if it is [FR Doc. 2016–31870 Filed 1–4–17; 8:45 am] p.m., Monday through Friday, except possible to do so without incurring BILLING CODE 4910–13–P Federal holidays. expense or delay. We may change this proposal in light of the comments we Examining the AD Docket receive. You may examine the AD docket on the Internet at http:// Discussion www.regulations.gov or in person at the On August 31, 1993, we issued AD Docket Operations Office between 9 93–17–13, Amendment 39–8684 (58 FR a.m. and 5 p.m., Monday through 51770, October 5, 1993), for Schweizer Friday, except Federal holidays. The AD Aircraft Corporation and Hughes docket contains this proposed AD, the Helicopters, Inc., Model 269A, 269A–1, economic evaluation, any comments 269B, 269C, and TH55A helicopters. AD received, and other information. The 93–17–13 requires within 30 days or street address for the Docket Operations 100 hours time-in-service (TIS),

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whichever occurs first, and thereafter FAA’s Determination numbered driveshaft is installed, every 300 hours TIS, visually inspecting We are proposing this AD because we emailing information to Sikorsky, and for cracks, machining steps, evaluated all known relevant returning damaged parts to Sikorsky; manufacturing tool marks, surface information and determined that an this proposed AD would not. defects, and lack of cleanup during the unsafe condition exists and is likely to Interim Action production grinding operation. AD 93– exist or develop on other products of 17–13 also requires installing engine these same type designs. We consider this proposed AD to be and rotor tachomometer markings and an interim action. The design approval replacing any unairworthy lower Related Service Information Under 1 holder is developing a replacement coupling driveshaft (driveshaft) before CFR Part 51 driveshaft that will address the unsafe further flight. The actions in AD 93–17– We reviewed Sikorsky 269C condition identified in this proposed 13 are intended to prevent failure of the Helicopter Alert Service Bulletin B–307, AD. Once the replacement driveshaft is driveshaft, loss of power to the rotor Basic Issue, dated December 18, 2014, developed, approved and available, we system, and subsequent loss of and Sikorsky 269C–1 Helicopter Alert might consider additional rulemaking. helicopter control. Service Bulletin C1B–043, Basic Issue, Costs of Compliance Actions Since AD 93–17–13 Was Issued dated December 18, 2014 (ASBs). The ASBs call for a one-time visual and We estimate that this proposed AD Since we issued AD 93–17–13, magnetic particle inspection of the would affect 619 helicopters of U.S. Sikorsky became the type certificate driveshaft and driveshaft assembly for Registry and that labor costs average $85 holder of the Model 269A, 269A–1, damage. The ASBs advise that the per work hour. Based on these 269B, 269C, and TH55A. Sikorsky driveshaft be sent to Sikorsky and estimates, we expect the following costs: • performed a safety analysis and replaced if damaged. The inspection is We estimate that the visual and determined that the initial and recurrent to be accomplished within 25 hours TIS magnetic particle inspections of the inspection intervals and inspection or within 180 days from the ASBs’ issue driveshaft would require 11 work hours method were not adequate to detect all date, whichever comes first. Sikorsky for a cost of $935 per helicopter and corrosion, pits, nicks, scratches, dents, has since revised its maintenance $578,765 for the U.S. fleet per and cracks. Since 1992, 10 accidents, 2 manual to incorporate these inspections inspection cycle. • of them fatal, occurred because of every 150 hours TIS. Replacing the driveshaft, if needed, driveshaft failures due to static overload We also reviewed Schweizer Aircraft would cost about $4,574 for parts. No or torsional fatigue. Five of the Service Bulletin B–257.1, dated May 21, additional labor costs would be accidents occurred after AD 93–17–13 1993 (ASB B–257.1). ASB B–257.1 calls necessary. • was issued. for a one-time inspection to look for Installing engine and rotor We propose reducing the initial and drive-shaft defects; installing tachometer markings would require 0.5 recurring inspection intervals, changing declutched limit markings on the work-hour for a labor cost of about $43. the type of damage to be detected by the engine/rotor tachometer to reinforce The cost of parts would be minimal. visual inspection, and adding a operating limits; and prohibiting engine Authority for This Rulemaking magnetic particle inspection. declutched operations above 1,600 We propose including specific part- RPM. Title 49 of the United States Code numbered driveshafts to the This service information is reasonably specifies the FAA’s authority to issue applicability because Sikorsky is available because the interested parties rules on aviation safety. Subtitle I, developing a new driveshaft that we do have access to it through their normal section 106, describes the authority of not expect to be subject to this AD. course of business or by the means the FAA Administrator. ‘‘Subtitle VII: We propose expanding the identified in the ADDRESSES section. Aviation Programs,’’ describes in more applicability to include Model 269C–1 detail the scope of the Agency’s helicopters. These helicopters were not Proposed AD Requirements authority. manufactured when AD 93–17–13 was This proposed AD would require We are issuing this rulemaking under issued but have applicable driveshafts within 25 hours TIS and thereafter at the authority described in ‘‘Subtitle VII, installed. intervals not to exceed 150 hours TIS, Part A, Subpart III, Section 44701: We propose to retain the requirement visual inspections of the driveshaft. If General requirements.’’ Under that to install engine and tachometer there are no cracks, corrosion, or other section, Congress charges the FAA with markings. AD 93–17–13 requires these damage, this proposed AD would promoting safe flight of civil aircraft in markings because of reports of require performing a magnetic particle air commerce by prescribing regulations driveshaft damage as a result of engine inspection. If there is a crack or other for practices, methods, and procedures overspeeds during start-up. damage, this proposed AD would the Administrator finds necessary for Finally, we would require a visual require replacing the driveshaft before safety in air commerce. This regulation inspection for ‘‘corrosion, a pit, a nick, further flight. This proposed AD would is within the scope of that authority a scratch, a dent, or a crack’’ instead of also require adding tachometer because it addresses an unsafe condition ‘‘cracks, machining steps, markings if not previously performed. that is likely to exist or develop on manufacturing tool marks, surface products identified in this rulemaking Differences Between This Proposed AD defects and lack of cleanup during the action. production grinding operation’’ and the Service Information contained in AD 93–17–13. Since AD The Sikorsky service information calls Regulatory Findings 93–17–13 was issued, we have seen no for the initial inspection to be We determined that this proposed AD evidence that the driveshaft failures completed within 180 days or 25 hours would not have federalism implications were caused by production errors. time-in-service (TIS). This proposed AD under Executive Order 13132. This The proposed actions are intended to would require the initial inspection to proposed AD would not have a prevent failure of the driveshaft, loss of be completed within 25 hours TIS only. substantial direct effect on the States, on power to the rotor system, and The service information requires the relationship between the national subsequent loss of helicopter control. contacting Sikorsky if a certain part- Government and the States, or on the

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distribution of power and (c) Affected ADs lacking a principal inspector, the manager of responsibilities among the various This AD supersedes AD 93–17–13, the local flight standards district office or levels of government. Amendment 39–8684 (58 FR 51770, October certificate holding district office before 5, 1993). operating any aircraft complying with this For the reasons discussed, I certify AD through an AMOC. this proposed regulation: (d) Comments Due Date (i) Additional Information 1. Is not a ‘‘significant regulatory We must receive comments by March 6, For service information identified in this 2017. action’’ under Executive Order 12866; AD, contact Sikorsky Aircraft Corporation, 2. Is not a ‘‘significant rule’’ under the (e) Compliance Customer Service Engineering, 124 Quarry DOT Regulatory Policies and Procedures Road, Trumbull, CT 06611; telephone 1–800– You are responsible for performing each _ _ (44 FR 11034, February 26, 1979); action required by this AD within the Winged-S or 203–416–4299; email wcs cust [email protected]. You may specified compliance time unless it has 3. Will not affect intrastate aviation in review a copy of information at the FAA, already been accomplished prior to that time. Alaska to the extent that it justifies Office of the Regional Counsel, Southwest making a regulatory distinction; and (f) Required Actions Region, 10101 Hillwood Pkwy, Room 6N– 4. Will not have a significant (1) Within 25 hours time-in-service (TIS), 321, Fort Worth, TX 76177. economic impact, positive or negative, install engine and rotor tachometer markings (j) Subject on a substantial number of small entities in accordance with Part II of Schweizer Joint Aircraft Service Component (JASC) under the criteria of the Regulatory Aircraft Service Bulletin B–257.1, dated May Code: 6300, Main Rotor Drive System. Flexibility Act. 21, 1993. (2) Within 25 hours TIS and thereafter at Issued in Fort Worth, Texas, on December We prepared an economic evaluation intervals not to exceed 150 hours TIS: 21, 2016. of the estimated costs to comply with (i) Visually inspect the driveshaft for Lance T. Gant, this proposed AD and placed it in the corrosion, a pit, a nick, a scratch, a dent, and Manager, Rotorcraft Directorate, Aircraft AD docket. a crack in accordance with the Certification Service. Accomplishment Instructions, paragraph [FR Doc. 2016–31622 Filed 1–4–17; 8:45 am] List of Subjects in 14 CFR Part 39 3.B.(1) through 3.B.(6) of Sikorsky 269C Helicopter Alert Service Bulletin B–307, BILLING CODE 4910–13–P Air transportation, Aircraft, Aviation Basic Issue, dated December 18, 2014 (269C safety, Incorporation by Reference, ASB), or Sikorsky 269C–1 Helicopter Alert Safety. Service Bulletin C1B–043, Basic Issue, dated DEPARTMENT OF TRANSPORTATION The Proposed Amendment December 18, 2014 (269C–1 ASB), whichever is applicable for your model helicopter, Federal Aviation Administration Accordingly, under the authority except we do not require that you use a 14 CFR Part 39 delegated to me by the Administrator, Sikorsky recommended vendor list. If there is any corrosion, a pit, a nick, a scratch, a dent, the FAA proposes to amend 14 CFR part [Docket No. FAA–2016–9521; Directorate or a crack, replace the driveshaft before Identifier 2016–NM–061–AD] 39 as follows: further flight. (ii) If there is no corrosion and no pits, RIN 2120–AA64 PART 39—AIRWORTHINESS nicks, scratches, dents, and cracks, magnetic DIRECTIVES particle inspect the driveshaft for a crack in Airworthiness Directives; Airbus accordance with paragraph 3.C.(1) of the Defense and Space S.A. (Formerly ■ 1. The authority citation for part 39 269C ASB or 269C–1 ASB, whichever is Known as Construcciones continues to read as follows: applicable for your model helicopter. This Aeronauticas, S.A.) Airplanes magnetic particle inspection must be Authority: 49 U.S.C. 106(g), 40113, 44701. performed by a Level II or higher technician AGENCY: Federal Aviation § 39.13 [Amended] with the National Aerospace Standard 410 or Administration (FAA), DOT. equivalent certification who has performed a ACTION: ■ Notice of proposed rulemaking 2. The FAA amends § 39.13 by magnetic particle inspection within the last (NPRM). removing Airworthiness Directive (AD) 12 months. If there is a crack, replace the AD 93–17–13, Amendment 39–8684 (58 driveshaft before further flight. SUMMARY: We propose to adopt a new FR 51770, October 5, 1993) and adding (g) Credit for Actions Previously Completed airworthiness directive (AD) for all the following new airworthiness Compliance with paragraph (a)(1) of AD Airbus Defense and Space S.A. Model directive (AD): 93–17–13, Amendment 39–8684 (58 FR CN–235, CN–235–100, CN–235–200, Sikorsky Aircraft Corporation (Type 51770, October 5, 1993) before the effective CN–235–300, and C–295 airplanes. This Certificate Previously Held By date of this AD is considered acceptable for proposed AD was prompted by reports Schweizer Aircraft Corporation): Docket compliance with the actions specified in of excessive play between bushings and No. FAA–2016–6968; Directorate paragraph (f)(1) of this AD. their respective fitting housings at Identifier 2015–SW–020–AD. (h) Alternative Methods of Compliance certain elevator fittings. This proposed (a) Applicability (AMOC) AD would require a one-time detailed inspection and repetitive eddy current (1) The Manager, Boston Aircraft This AD applies to Model TH55A, 269A, inspections of the elevator hinge fitting 269A–1, 269B, 269C and 269C–1 helicopters, Certification Office, FAA, may approve with a lower coupling driveshaft (driveshaft) AMOCs for this AD. Send your proposal to: and bracket assembly, and corrective part number (P/N) 269–5412, 269A5504, Blaine Williams, Aerospace Engineer, Boston actions if necessary. We are proposing 269A5504–003, 269A5504–005, 269A5559, Aircraft Certification Office, Engine & this AD to address the unsafe condition or 269A5559–003 installed, certificated in Propeller Directorate, 12 New England on these products. any category. Executive Park, Burlington, Massachusetts DATES: We must receive comments on 01803; telephone (781) 238–7161; email this proposed AD by February 21, 2017. (b) Unsafe Condition [email protected]. This AD defines the unsafe condition as (2) For operations conducted under a 14 ADDRESSES: You may send comments, failure of a driveshaft. This condition could CFR part 119 operating certificate or under using the procedures found in 14 CFR result in loss of power to the rotor system 14 CFR part 91, subpart K, we suggest that 11.43 and 11.45, by any of the following and subsequent loss of helicopter control. you notify your principal inspector, or methods:

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