AD 2017-23-08

We are superseding Airworthiness Directive (AD) 2014-24-02 for Agusta S.p.A. (Agusta) Model AB139 and AW139 helicopters. AD 2014-24-02 required repetitively inspecting the main rotor (M/R) rotating scissors, removing certain lower half scissor spherical bearings (bearings) from service, and installing a special nut. This new AD revises the inspection requirements and requires replacing the bearings. This AD is prompted by a new report of a dislodged bearing of an M/R rotating scissor. The actions of this AD are intended to correct an unsafe condition on these products.

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 removing Airworthiness Directive (AD) 2014-24-02, Amendment 39-18035 (79 FR 70785, November 28, 2014), and adding the following new AD: \n\n2017-23-08 Agusta S.p.A.: Amendment 39-19102; Docket No. FAA-2017- 0982; Product Identifier 2017-SW-009-AD. \n\n(a) Applicability \n\n\n\tThis AD applies to Model AB139 and AW139 helicopters with main rotor (M/R) rotating scissors with a lower half scissor spherical bearing (bearing) P/N 3G6230V00654 installed, certificated in any category. \n\n(b) Unsafe Condition \n\n\n\tThis AD defines the unsafe condition as excessive play of the bearing in the M/R rotating scissors. This condition could result in failure of the M/R rotating scissors and subsequent loss of control of the helicopter. \n\n(c) Affected ADs \n\n\n\tThis AD supersedes AD 2014-24-02, Amendment 39-18035 (79 FR 70785, November 28, 2014). \n\n(d) Effective Date \n\n\n\tThis AD becomes effective December 11, 2017. \n\n(e) Compliance \n\n\n\tYou are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time. \n\n(f) Required Actions \n\n\n\t(1) Within 5 hours time-in-service (TIS), and thereafter before the first flight of each day or at intervals not exceeding 24-clock hours, whichever occurs later: \n\t(i) Using a magnifying glass and a flashlight, visually inspect each bearing for wear of the bearing liner. Some examples of wear are shown in Figures 4 through 8 of Leonardo Helicopters Alert Bollettino Tecnico No. 139-392, Revision A, dated February 14, 2017 (BT 139-392). If there is any wear of the liner, before further flight, replace the bearing with bearing P/N 3G6230V00655 and install special nut P/N 3G6230A06851. Replacing the bearing with bearing P/N 3G6230V00655 constitutes terminating action for the remaining actions of this AD for the bearing. \n\t(ii) Inspect each bearing for movement. Refer to Figure 9 of BT 139-392. If the bearing moves freely out of its seat, before further flight, replace the rotating scissor attachment flange with flange P/N 3G6220A00633, replace the bearing with bearing P/N 3G6230V00655 and install special nut P/N 3G6230A06851. Replacing the bearing with bearing P/N 3G6230V00655 constitutes terminating action for the remaining actions of this AD for the bearing. \n\t(iii) Inspect the M/R rotating scissors for play and wear of each bearing, paying particular attention to the bearing staking condition, by manually moving the lower half scissor along the axis of the spherical bearing. Refer to Figure 1 of BT 139-392. If there is any play or wear beyond allowable limits, before further flight, replace the bearing with bearing P/N 3G6230V00655 and install special nut P/N 3G6230A06851. Replacing the bearing with bearing P/N 3G6230V00655 constitutes terminating action for the remaining actions of this AD for the bearing. \n\t(2) Within 100 hours TIS, replace and torque each lower half scissor nut with special nut P/N 3G6230A06851 to the M/R rotating scissor in accordance with the Compliance Instructions, Part II, steps 5.1 through 5.9 of BT 139-392, except you are not required to discard parts. \n\t(3) As of the effective date of this AD, do not install any M/R rotating scissors with a bearing P/N 3G6230V00654 installed. \n\n(g) Alternative Methods of Compliance (AMOCs) \n\n\n\t(1) The Manager, Safety Management Section, FAA, may approve AMOCs for this AD. Send your proposal to: Matt Fuller, Senior Aviation Safety Engineer, Safety Management Section, Rotorcraft Standards Branch, FAA, 10101 Hillwood Pkwy, Fort Worth, TX 76177; telephone (817) 222-5110; email 9-ASW-FTW-AMOC-Requests@faa.gov. \n\t(2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC. \n\n(h) Additional Information \n\n\n\t(1) Leonardo Helicopters AW139 IETP Document Code AMP-39-C-62- 31-00-00A-31AC-A, Rotating control installation--Fixed \n\n((Page 55755)) \n\nswashplate and rotating scissors--Detailed inspection, Issue 29, dated July 31, 2017, which is not incorporated by reference, contains additional information about the subject of this AD. For service information identified in this AD, contact Leonardo S.p.A. Helicopters, Matteo Ragazzi, Head of Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate (Va) Italy; telephone +39-0331- 711756; fax +39-0331-229046; or at http://www.leonardocompany.com/-/bulletins. You may review a copy of the service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy, Room 6N-321, Fort Worth, TX 76177. \n\t(2) The subject of this AD is addressed in European Aviation Safety Agency (EASA) AD No. 2017-0028-E, dated February 15, 2017. You may view the EASA AD on the Internet at http://www.regulations.gov by searching for and locating it in Docket No. FAA-2017-0982. \n\n(i) Subject \n\n\n\tJoint Aircraft Service Component (JASC) Code: 6200, M/R System. \n\n(j) 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) Leonardo Helicopters Alert Bollettino Tecnico No. 139-392, Revision A, dated February 14, 2017. \n\t(ii) Reserved. \n\t(3) For Leonardo Helicopters service information identified in this AD, contact Leonardo S.p.A. Helicopters, Matteo Ragazzi, Head of Airworthiness, Viale G.Agusta 520, 21017 C.Costa di Samarate (Va) Italy; telephone +39-0331-711756; fax +39-0331-229046; or at http://www.leonardocompany.com/-/bulletins. \n\t(4) You may view this service information at FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy, Room 6N- 321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222-5110. \n\t(5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

Comments Invited \n\n\n\tThis AD is a final rule that involves requirements affecting flight safety, and we did not provide you with notice and an opportunity to provide your comments prior to it becoming effective. However, we invite you to participate in this rulemaking by submitting written comments, data, or views. We also invite comments relating to the economic, environmental, energy, or federalism impacts that resulted from adopting this AD. The most helpful comments reference a specific portion of the AD, explain the reason for any recommended change, and include supporting data. To ensure the docket does not contain duplicate comments, commenters should send only one copy of written comments, or if comments are filed electronically, commenters should submit them only one time. We will file in the docket all comments that we receive, as well as a report summarizing each substantive public contact with FAA personnel concerning this rulemaking duringthe comment period. We will consider all the comments we receive and may conduct additional rulemaking based on those comments. \n\nDiscussion \n\n\n\tWe issued AD 2014-24-02, Amendment 39-18035 (79 FR 70785, November 28, 2014) (AD 2014-24-02), for Agusta S.p.A. Model AB139 and AW139 helicopters with a M/R rotating scissors part number (P/N) 3G6230A00733 with a bearing P/N 3G6230V00654 installed. AD 2014-24-02 required repetitive inspections of the M/R rotating scissors for damage and play of the bearing and replacing the nut with a special nut, P/N 3G6230A06851, which lengthens the compliance time for repetitive inspections. AD 2014-24-02 was prompted by AD No. 2014-0215-E, dated September 24, 2014, issued by EASA, which is the Technical Agent for the Member States of the European Union. EASA AD No. 2014-0215-E corrected an unsafe condition for the AgustaWestland S.p.A and AgustaWestland Philadelphia Corporation Model AB139 and AW139 helicopters. EASA advised of reports of early excessive play in the bearings and a report of a chipped bearing liner. \n\nActions Since AD 2014-24-02 Was Issued \n\n\n\tSince we issued AD 2014-24-02, EASA issued AD No. 2017-0028-E, dated February 15, 2017, which supersedes AD No. 2014-0215-E. EASA AD No. 2017-0028-E was prompted by a report of a dislodged bearing P/N 3G6230V00654 with special nut P/N 3G6230A06851 installed. EASA advises that all bearings P/N 3G6230V00654 could prematurely damage or wear, including those with the special nut. For these reasons, EASA AD No. 2017-0028-E partially retains the repetitive inspections and requires replacement of the bearing with improved bearing P/N 3G6230V00655 as terminating action for the inspections. \n\tAdditionally, Agusta S.p.A. has changed its name to Leonardo Helicopters. Because the FAA is in the process of updating this name change on its FAA type certificate and it is not yet effective, this AD specifies Agusta S.p.A. as the type certificate holder. \n\nFAA's Determination \n\n\n\tThese helicopters have been approved by the aviation authority of Italy and are approved for operation in the United States. Pursuant to our bilateral agreement with Italy, EASA, its technical representative, has notified us of the unsafe condition described in the EASA AD. We are issuing this AD because we evaluated all information provided by EASA and determined the unsafe condition exists and is likely to exist or develop on other helicopters of these same type designs. \n\nRelated Service Information Under 1 CFR Part 51 \n\n\n\tWe reviewed Leonardo Helicopters (previously Agusta S.p.A.) Alert Bollettino Tecnico No. 139-392, Revision A, dated February 14, 2017. This service information specifies repetitively inspecting the M/R rotating scissors to monitor the bearings and replacing the bearing with a new part-numbered bearing. \n\tThis 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\nOther Related Service Information \n\n\n\tWe reviewed Leonardo Helicopters AW139 IETP Document Code AMP-39-C- 62-31-00-00A-31AC-A, Rotating control installation--Fixed swashplate and rotating scissors--Detailed inspection, Issue 29, dated July 31, 2017. This service information describes procedures for a detailed inspection of the fixed swashplate and rotating scissors. \n\nAD Requirements \n\n\n\tThis new AD reduces the inspection interval for some M/R rotating scissors, clarifies the inspection for damage, adds an inspection for movement of the bearing out of its seat, and retains the inspection for play of the bearing. Depending on the outcome of these inspections, this AD requires replacing the bearing with an improved bearing, replacing the rotating scissor attachment flange with a certain part- numbered rotating scissor attachment flange, and replacing the nut with a certain part-numbered special nut. If not done as a result of the inspections,this AD also requires replacing each nut with a certain part-numbered special nut. \n\nDifferences Between This AD and the EASA AD \n\n\n\tThe EASA AD requires replacing each bearing P/N 3G6230V00654 with bearing P/N 3G6230V00655 within 12 months; whereas, this AD does not. We plan to publish a notice of proposed rulemaking to give the public an opportunity to comment on this long-term requirement. \n\nCosts of Compliance \n\n\n\tWe estimate that this AD affects 103 helicopters of U.S. Registry. We estimate that operators may incur the following costs in order to comply with this AD. Labor costs are estimated at $85 per work-hour. Inspecting for bearing liner wear, seat movement, and play will take about 1 work-hour for a cost of $85 per helicopter and $8,755 for the U.S. fleet per inspection cycle. Replacing a bearing will take 2 work- hours and parts will cost $892 for a cost of $1,062 per bearing. Replacing a rotating scissor attachment flange will cost $20,629 for parts and no additional labor. Installing two special nuts on a helicopter will take 1 work-hour and parts will cost $682 for a cost of $767 helicopter and $79,001 for the U.S. fleet. \n\tAccording to Leonardo Helicopter's service information, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. We do not control warranty coverage by Leonardo Helicopter. Accordingly, we have included all costs in our cost estimate. \n\nFAA's Justification and Determination of the Effective Date \n\n\n\tProviding an opportunity for public comments prior to adopting these AD \n\n((Page 55754)) \n\nrequirements would delay implementing the safety actions needed to correct this known unsafe condition. Therefore, we find that the risk to the flying public justifies waiving notice and comment prior to the adoption of this rule because the unsafe condition can adversely affect the controllability of the helicopter and some of the required corrective actions must beaccomplished within 5 hours time-in-service and thereafter every 24 hours. Other corrective actions in this AD must be accomplished within 100 hours time-in-service; however, these helicopters are generally high-usage aircraft and could reach this compliance time within a very short calendar time. \n\tSince an unsafe condition exists that requires the immediate adoption of this AD, we determined that notice and opportunity for public comment before issuing this AD are impracticable and that good cause exists for making this amendment effective in less than 30 days. \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\tWe are 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. \n\nRegulatory Findings \n\n\n\tWe determined that this 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, I certify that this AD: \n\t1. Is not a ''significant regulatory action'' under Executive Order 12866; \n\t2. Is not a ''significant rule'' under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); \n\t3. Will not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction; and \n\t4. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. \n\tWe prepared an economic evaluation of the estimated costs to comply with this AD and placed it in the AD docket. \n\nList of Subjects in 14 CFR Part 39 \n\n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.