Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters, 60376-60378 [2018-25497]

Download as PDF 60376 Federal Register / Vol. 83, No. 227 / Monday, November 26, 2018 / Proposed Rules (h) Functional Check Within 1,500 flight hours or 12 months after the effective date of this AD, whichever occurs first, accomplish a functional check of the fuel indicator gauging accuracy and the low level warning, in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000–28–028, dated April 19, 2018. (i) Corrective Action If the functional check required by paragraph (h) of this AD is found to be out of tolerance, within the limits and under the applicable conditions, as specified in the operator’s Minimum Equipment List, replace the affected part with a serviceable part, in accordance with the Accomplishment Instructions of Saab Service Bulletin 2000– 28–028, dated April 19, 2018. SE–581 88, Linko¨ping, Sweden; telephone +46 13 18 5591; fax +46 13 18 4874; email saab2000.techsupport@saabgroup.com; internet http://www.saabgroup.com. You may view this service information at the FAA, Transport Standards Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. Issued in Des Moines, Washington, on November 8, 2018. Chris Spangenberg, Acting Director, System Oversight Division, Aircraft Certification Service. [FR Doc. 2018–25495 Filed 11–23–18; 8:45 am] BILLING CODE 4910–13–P (j) Parts Installation Limitation As of the effective date of this AD, no person may install, on any airplane, an affected part, unless it is a serviceable part, as defined in paragraph (g)(2) of this AD. DEPARTMENT OF TRANSPORTATION (k) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Section, Transport Standards 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 International Section, send it to the attention of the person identified in paragraph (l)(2) of this AD. Information may be emailed to: 9-ANM-116-AMOCREQUESTS@faa.gov. 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. (2) Contacting the Manufacturer: For any requirement in this AD to obtain corrective actions from a manufacturer, the action must be accomplished using a method approved by the Manager, International Section, Transport Standards Branch, FAA; or the European Aviation Safety Agency (EASA); or Saab AB, Saab Aeronautics’s EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. [Docket No. FAA–2018–0991; Product Identifier 2017–SW–050–AD] (l) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) EASA Airworthiness Directive 2018–0187, dated August 29, 2018, for related information. This MCAI may be found in the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA–2018–0964. (2) For more information about this AD, contact Shahram Daneshmandi, Aerospace Engineer, International Section, Transport Standards Branch, FAA, 2200 South 216th St., Des Moines, WA 98198; telephone and fax 206–231–3220. (3) For service information identified in this AD, contact Saab AB, Saab Aeronautics, VerDate Sep<11>2014 16:28 Nov 23, 2018 Jkt 247001 Federal Aviation Administration 14 CFR Part 39 RIN 2120–AA64 Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for MDHI Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters. This proposed AD would require inspecting each main rotor blade (MRB) for a crack. This proposed AD is prompted by reports of cracked MRBs. The actions of this proposed AD are intended to address an unsafe condition on these helicopters. DATES: We must receive comments on this proposed AD by January 25, 2019. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your comments electronically. • Fax: 202–493–2251. • Mail: Send comments to the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE, Washington, DC 20590–0001. • Hand Delivery: Deliver to the ‘‘Mail’’ address between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. SUMMARY: Examining the AD Docket You may examine the AD docket on the internet at http:// PO 00000 Frm 00004 Fmt 4702 Sfmt 4702 www.regulations.gov by searching for and locating Docket No. FAA–2018– 0991; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the economic evaluation, any comments received, and other information. The street address for Docket Operations (telephone 800–647– 5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. For Helicopter Technology Company, LLC service information identified in this proposed rule, contact Helicopter Technology Company, LLC, 12902 South Broadway, Los Angeles, CA 90061; telephone (310) 523–2750; or at www.helicoptertech.com. You may review the referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. For MD Helicopters service information identified in this proposed rule, contact MD Helicopters, Inc., Attn: Customer Support Division, 4555 E. McDowell Rd., Mail Stop M615, Mesa, AZ 85215–9734; telephone 1–800–388– 3378; fax 480–346–6813; or at http:// www.mdhelicopters.com. FOR FURTHER INFORMATION CONTACT: Galib Abumeri, Aviation Safety Engineer, Los Angeles ACO Branch, Compliance and Airworthiness Division, FAA, 3960 Paramount Blvd., Lakewood, California 90712; telephone (562) 627–5374; email galib.abumeri@ faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited 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 might result from adopting the proposals in this document. The most helpful comments reference a specific portion of the proposal, 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 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 proposed rulemaking. Before acting on this proposal, we will consider all comments we receive on or E:\FR\FM\26NOP1.SGM 26NOP1 Federal Register / Vol. 83, No. 227 / Monday, November 26, 2018 / Proposed Rules before the closing date for comments. We will consider comments filed after the comment period has closed if it is possible to do so without incurring expense or delay. We may change this proposal in light of the comments we receive. Discussion We propose to adopt a new AD for MDHI Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters with a Helicopter Technology Company, LLC (HTC) MRB part number 369A1100, 369D21100, 369D21102, 369D21120, 369D21121, 369D21123, 500P2100, or 500P2300 installed. This proposed AD would require repetitively inspecting the MRB trim tab for gouges, nicks, scratches, and cracks. This proposed AD is prompted by reports of two operators finding cracks on an HTC-manufactured MRB. In both cases, the cracking was located on the MRB skin adjacent to the trim tab, and they were discovered following flights in which an increase in vibration levels was noticed. HTC determined the root cause of the cracking to be fatigue. HTC also stated that there was evidence of impact damage, filing, and sanding under the paint of the cracked MRBs. If not detected and corrected, this condition could result in failure of an MRB and subsequent loss of control of the helicopter. FAA’s Determination We are proposing this AD because we evaluated all known relevant information and determined that an unsafe condition exists and is likely to exist or develop on other helicopters of these same type designs. Related Service Information We reviewed HTC Mandatory Service Bulletin Notice No. 2100–9, dated May 25, 2017 (SB 2100–9), which contains procedures for inspecting each MRB for a crack in an area adjacent to the inboard edge of the MRB trim tab. We also reviewed MD Helicopters Service Bulletin No. SB369D–221, SB369E–119, SB369F–106, SB369H– 257, SB500N–057, and SB600N–069, each dated April 2, 2018. This service information specifies inspecting the MRBs for cracks near the trim tab by following the instructions in SB 2100–9. Proposed AD Requirements This proposed AD would require, within 25 hours time-in-service and thereafter at each 100-hour or annual inspection, inspecting each MRB trim tab end at the trailing edge corner where VerDate Sep<11>2014 16:28 Nov 23, 2018 Jkt 247001 the trim tab and MRB meet for cracks, and inspecting the top and bottom surface of each MRB for a crack in the area adjacent to inboard trim tab the trim tab corner for a crack, from the trailing edge towards the leading edge. If there is a crack, this proposed AD would require replacing the MRB. Differences Between This Proposed AD and the Service Information The service information specifies procedures for inspecting each MRB for nicks, gouges, and scratches. This proposed AD does not, as the unsafe condition concerns a crack in the MRB. This proposed AD would require using a 10X magnifying glass for both inspections, while the service information only specifies this level of magnification for the inspection of the top and bottom surfaces of the MRB. Costs of Compliance We estimate that this proposed AD would affect 622 helicopters of U.S. Registry. At an average labor rate of $85 per work-hour, we estimate that operators may incur the following costs in order to comply with this AD. Inspecting one MRB would require about 0.1 workhour, for a cost per helicopter of $43 for MDHI Model 369-series and 500N helicopters and $51 for MDHI Model 600N helicopters, and a total cost of $25,320 to U.S. operators per inspection cycle. If required, replacing one MRB would require 3 work-hours, and required parts would cost $13,000, for a cost per MRB of $13,255. Authority for This Rulemaking Title 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. We 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. PO 00000 Frm 00005 Fmt 4702 Sfmt 4702 60377 Regulatory Findings We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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. For the reasons discussed, I certify this proposed regulation: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; 2. Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); 3. Will not affect intrastate aviation in Alaska to the extent that it justifies making a regulatory distinction; and 4. 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. We prepared an economic evaluation of the estimated costs to comply with this proposed AD and placed it in the AD docket. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ MD Helicopters Inc.: Docket No. FAA– 2018–0991; Product Identifier 2017–SW– 050–AD. (a) Applicability This AD applies to MD Helicopters Inc. Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters, certificated in any category, with a main rotor blade (MRB) part number 369A1100, 369D21100, 369D21102, 369D21120, 369D21121, 369D21123, 500P2100, or 500P2300, all dash numbers, installed. (b) Unsafe Condition This AD defines the unsafe condition as a crack in an MRB. This condition could result E:\FR\FM\26NOP1.SGM 26NOP1 60378 Federal Register / Vol. 83, No. 227 / Monday, November 26, 2018 / Proposed Rules in failure of the MRB and subsequent loss of control of the helicopter. (c) Comments Due Date We must receive comments by January 25, 2019. (d) Compliance You 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. (e) Required Actions Within 25 hours time-in-service, and thereafter at each 100-hour inspection or annual inspection, whichever occurs first: (1) Using a 10X or higher power magnifying glass and a light, inspect each MRB trim tab end at the trailing edge corner where the trim tab and MRB meet for a crack. If there is a crack, before further flight, replace the MRB. (2) Using a 10X or higher power magnifying glass and a light, inspect the top and bottom surface of each MRB adjacent to the inboard trim tab corner for a crack, from the trailing edge towards the leading edge. If there is a crack, before further flight, replace the MRB. (f) Alternative Methods of Compliance (AMOC) (1) The Manager, Los Angeles ACO Branch, FAA, may approve AMOCs for this AD. Send your proposal to: Galib Abumeri, Aviation Safety Engineer, Los Angeles ACO Branch, Compliance and Airworthiness Division, FAA, 3960 Paramount Blvd., Lakewood, California 90712; telephone (562) 627–5374; email 9-ANM-LAACO-AMOC-REQUESTS@ faa.gov. (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. (g) Additional Information (1) Helicopter Technology Company, LLC Mandatory Service Bulletin Notice No. 2100– 9, dated May 25, 2017, which is not incorporated by reference, contains additional information about the subject of this AD. For Helicopter Technology Company, LLC service information identified in this AD, contact Helicopter Technology Company, LLC, 12902 South Broadway, Los Angeles, CA 90061; telephone (310) 523– 2750; or at www.helicoptertech.com. (2) MD Helicopters Service Bulletin No. SB369D–221, SB369E–119, SB369F–106, SB369H–257, SB500N–057, and SB600N– 069, each dated April 2, 2018, which are not incorporated by reference, contain additional information about the subject of this AD. For MD Helicopters service information identified in this AD, contact MD Helicopters, Inc., Attn: Customer Support Division, 4555 E. McDowell Rd., Mail Stop M615, Mesa, AZ 85215–9734; telephone 1– 800–388–3378; fax 480–346–6813; or at http://www.mdhelicopters.com. VerDate Sep<11>2014 16:28 Nov 23, 2018 Jkt 247001 (3) You may review a copy of information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy, Room 6N–321, Fort Worth, TX 76177. (h) Subject Joint Aircraft Service Component (JASC) Code: 6210 Main Rotor Blade. Issued in Fort Worth, Texas, on November 14, 2018. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2018–25497 Filed 11–23–18; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2018–0256; Airspace Docket No. 18–AEA–11] RIN 2120–AA66 Proposed Amendment of Class D Airspace and Class E Airspace; Schenectady, NY, Ithaca, NY, and Albany, NY Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: This action proposes to amend Class D airspace, Class E airspace designated as an extension to a Class D surface area, and Class E airspace extending upward from 700 feet or more above the surface at Schenectady County Airport, Schenectady, NY, and Albany, NY by updating the geographic coordinates of this airport, Saratoga County Airport, Hunter NDB, and Cambridge VORTAC. Controlled airspace is necessary for the safety and management of instrument flight rules (IFR) operations at this airport. This action also would replace the outdated term Airport/Facility Directory with the term Chart Supplement in the legal descriptions of associated Class D and E airspace of Schenectady County Airport, Schenectady, NY, and Ithaca Tompkins Regional Airport, Ithaca, NY. DATES: Comments must be received on or before January 10, 2019. ADDRESSES: Send comments on this proposal to: U.S. Department of Transportation, Docket Operations, 1200 New Jersey Avenue SE, West Building Ground Floor, Room W12–140, Washington, DC 20590; Telephone: (800) 647–5527, or (202) 366–9826. You must identify the Docket No. SUMMARY: PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 FAA–2018–0256; Airspace Docket No. 18–AEA–11, at the beginning of your comments. You may also submit comments through the internet at http:// www.regulations.gov. FAA Order 7400.11C, Airspace Designations and Reporting Points, and subsequent amendments can be viewed on line at http://www.faa.gov/air_ traffic/publications/. For further information, you can contact the Airspace Policy Group, Federal Aviation Administration, 800 Independence Avenue SW, Washington, DC 20591; telephone: (202) 267–8783. The Order is also available for inspection at the National Archives and Records Administration (NARA). For information on the availability of FAA Order 7400.11C at NARA, call (202) 741–6030, or go to https:// www.archives.gov/federal-register/cfr/ ibr-locations.html. FAA Order 7400.11, Airspace Designations and Reporting Points, is published yearly and effective on September 15. FOR FURTHER INFORMATION CONTACT: John Fornito, Operations Support Group, Eastern Service Center, Federal Aviation Administration, 1701 Columbia Ave, College Park, GA 30337; telephone (404) 305–6364. SUPPLEMENTARY INFORMATION: Authority for This Rulemaking The FAA’s authority to issue rules regarding aviation safety is found in Title 49 of the United States Code. 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. This rulemaking is promulgated under the authority described in Subtitle VII, Part A, Subpart I, Section 40103. Under that section, the FAA is charged with prescribing regulations to assign the use of airspace necessary to ensure the safety of aircraft and the efficient use of airspace. This regulation is within the scope of that authority as it would amend Class D and Class E airspace at Schenectady County Airport, Schenectady, NY and Ithaca Tompkins Regional Airport, Ithaca, NY, to support IFR operations at these airports. Comments Invited Interested persons are invited to comment on this proposed rulemaking by submitting such written data, views, or arguments, as they may desire. Comments that provide the factual basis supporting the views and suggestions presented are particularly helpful in developing reasoned regulatory E:\FR\FM\26NOP1.SGM 26NOP1

Agencies

[Federal Register Volume 83, Number 227 (Monday, November 26, 2018)]
[Proposed Rules]
[Pages 60376-60378]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-25497]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0991; Product Identifier 2017-SW-050-AD]
RIN 2120-AA64


Airworthiness Directives; MD Helicopters Inc. (MDHI) Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
MDHI Model 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, 
and 600N helicopters. This proposed AD would require inspecting each 
main rotor blade (MRB) for a crack. This proposed AD is prompted by 
reports of cracked MRBs. The actions of this proposed AD are intended 
to address an unsafe condition on these helicopters.

DATES: We must receive comments on this proposed AD by January 25, 
2019.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your 
comments electronically.
     Fax: 202-493-2251.
     Mail: Send comments to the U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590-0001.
     Hand Delivery: Deliver to the ``Mail'' address between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

Examining the AD Docket

    You may examine the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0991; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this proposed AD, the economic evaluation, any comments received, and 
other information. The street address for Docket Operations (telephone 
800-647-5527) is in the ADDRESSES section. Comments will be available 
in the AD docket shortly after receipt.
    For Helicopter Technology Company, LLC service information 
identified in this proposed rule, contact Helicopter Technology 
Company, LLC, 12902 South Broadway, Los Angeles, CA 90061; telephone 
(310) 523-2750; or at www.helicoptertech.com. You may review the 
referenced service information at the FAA, Office of the Regional 
Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N-321, Fort 
Worth, TX 76177.
    For MD Helicopters service information identified in this proposed 
rule, contact MD Helicopters, Inc., Attn: Customer Support Division, 
4555 E. McDowell Rd., Mail Stop M615, Mesa, AZ 85215-9734; telephone 1-
800-388-3378; fax 480-346-6813; or at http://www.mdhelicopters.com.

FOR FURTHER INFORMATION CONTACT: Galib Abumeri, Aviation Safety 
Engineer, Los Angeles ACO Branch, Compliance and Airworthiness 
Division, FAA, 3960 Paramount Blvd., Lakewood, California 90712; 
telephone (562) 627-5374; email [email protected].

SUPPLEMENTARY INFORMATION:

Comments Invited

    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 might 
result from adopting the proposals in this document. The most helpful 
comments reference a specific portion of the proposal, 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 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 proposed rulemaking. Before acting on this proposal, we 
will consider all comments we receive on or

[[Page 60377]]

before the closing date for comments. We will consider comments filed 
after the comment period has closed if it is possible to do so without 
incurring expense or delay. We may change this proposal in light of the 
comments we receive.

Discussion

    We propose to adopt a new AD for MDHI Model 369A, 369D, 369E, 
369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters with a 
Helicopter Technology Company, LLC (HTC) MRB part number 369A1100, 
369D21100, 369D21102, 369D21120, 369D21121, 369D21123, 500P2100, or 
500P2300 installed. This proposed AD would require repetitively 
inspecting the MRB trim tab for gouges, nicks, scratches, and cracks.
    This proposed AD is prompted by reports of two operators finding 
cracks on an HTC-manufactured MRB. In both cases, the cracking was 
located on the MRB skin adjacent to the trim tab, and they were 
discovered following flights in which an increase in vibration levels 
was noticed. HTC determined the root cause of the cracking to be 
fatigue. HTC also stated that there was evidence of impact damage, 
filing, and sanding under the paint of the cracked MRBs. If not 
detected and corrected, this condition could result in failure of an 
MRB and subsequent loss of control of the helicopter.

FAA's Determination

    We are proposing this AD because we evaluated all known relevant 
information and determined that an unsafe condition exists and is 
likely to exist or develop on other helicopters of these same type 
designs.

Related Service Information

    We reviewed HTC Mandatory Service Bulletin Notice No. 2100-9, dated 
May 25, 2017 (SB 2100-9), which contains procedures for inspecting each 
MRB for a crack in an area adjacent to the inboard edge of the MRB trim 
tab.
    We also reviewed MD Helicopters Service Bulletin No. SB369D-221, 
SB369E-119, SB369F-106, SB369H-257, SB500N-057, and SB600N-069, each 
dated April 2, 2018. This service information specifies inspecting the 
MRBs for cracks near the trim tab by following the instructions in SB 
2100-9.

Proposed AD Requirements

    This proposed AD would require, within 25 hours time-in-service and 
thereafter at each 100-hour or annual inspection, inspecting each MRB 
trim tab end at the trailing edge corner where the trim tab and MRB 
meet for cracks, and inspecting the top and bottom surface of each MRB 
for a crack in the area adjacent to inboard trim tab the trim tab 
corner for a crack, from the trailing edge towards the leading edge. If 
there is a crack, this proposed AD would require replacing the MRB.

Differences Between This Proposed AD and the Service Information

    The service information specifies procedures for inspecting each 
MRB for nicks, gouges, and scratches. This proposed AD does not, as the 
unsafe condition concerns a crack in the MRB. This proposed AD would 
require using a 10X magnifying glass for both inspections, while the 
service information only specifies this level of magnification for the 
inspection of the top and bottom surfaces of the MRB.

Costs of Compliance

    We estimate that this proposed AD would affect 622 helicopters of 
U.S. Registry.
    At an average labor rate of $85 per work-hour, we estimate that 
operators may incur the following costs in order to comply with this 
AD. Inspecting one MRB would require about 0.1 work-hour, for a cost 
per helicopter of $43 for MDHI Model 369-series and 500N helicopters 
and $51 for MDHI Model 600N helicopters, and a total cost of $25,320 to 
U.S. operators per inspection cycle.
    If required, replacing one MRB would require 3 work-hours, and 
required parts would cost $13,000, for a cost per MRB of $13,255.

Authority for This Rulemaking

    Title 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.
    We 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.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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.
    For the reasons discussed, I certify this proposed regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979);
    3. Will not affect intrastate aviation in Alaska to the extent that 
it justifies making a regulatory distinction; and
    4. 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.
    We prepared an economic evaluation of the estimated costs to comply 
with this proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

MD Helicopters Inc.: Docket No. FAA-2018-0991; Product Identifier 
2017-SW-050-AD.

(a) Applicability

    This AD applies to MD Helicopters Inc. Model 369A, 369D, 369E, 
369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N helicopters, 
certificated in any category, with a main rotor blade (MRB) part 
number 369A1100, 369D21100, 369D21102, 369D21120, 369D21121, 
369D21123, 500P2100, or 500P2300, all dash numbers, installed.

(b) Unsafe Condition

    This AD defines the unsafe condition as a crack in an MRB. This 
condition could result

[[Page 60378]]

in failure of the MRB and subsequent loss of control of the 
helicopter.

(c) Comments Due Date

    We must receive comments by January 25, 2019.

(d) Compliance

    You 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.

(e) Required Actions

    Within 25 hours time-in-service, and thereafter at each 100-hour 
inspection or annual inspection, whichever occurs first:
    (1) Using a 10X or higher power magnifying glass and a light, 
inspect each MRB trim tab end at the trailing edge corner where the 
trim tab and MRB meet for a crack. If there is a crack, before 
further flight, replace the MRB.
    (2) Using a 10X or higher power magnifying glass and a light, 
inspect the top and bottom surface of each MRB adjacent to the 
inboard trim tab corner for a crack, from the trailing edge towards 
the leading edge. If there is a crack, before further flight, 
replace the MRB.

(f) Alternative Methods of Compliance (AMOC)

    (1) The Manager, Los Angeles ACO Branch, FAA, may approve AMOCs 
for this AD. Send your proposal to: Galib Abumeri, Aviation Safety 
Engineer, Los Angeles ACO Branch, Compliance and Airworthiness 
Division, FAA, 3960 Paramount Blvd., Lakewood, California 90712; 
telephone (562) 627-5374; email [email protected].
    (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.

(g) Additional Information

    (1) Helicopter Technology Company, LLC Mandatory Service 
Bulletin Notice No. 2100-9, dated May 25, 2017, which is not 
incorporated by reference, contains additional information about the 
subject of this AD. For Helicopter Technology Company, LLC service 
information identified in this AD, contact Helicopter Technology 
Company, LLC, 12902 South Broadway, Los Angeles, CA 90061; telephone 
(310) 523-2750; or at www.helicoptertech.com.
    (2) MD Helicopters Service Bulletin No. SB369D-221, SB369E-119, 
SB369F-106, SB369H-257, SB500N-057, and SB600N-069, each dated April 
2, 2018, which are not incorporated by reference, contain additional 
information about the subject of this AD. For MD Helicopters service 
information identified in this AD, contact MD Helicopters, Inc., 
Attn: Customer Support Division, 4555 E. McDowell Rd., Mail Stop 
M615, Mesa, AZ 85215-9734; telephone 1-800-388-3378; fax 480-346-
6813; or at http://www.mdhelicopters.com.
    (3) You may review a copy of information at the FAA, Office of 
the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy, Room 
6N-321, Fort Worth, TX 76177.

(h) Subject

    Joint Aircraft Service Component (JASC) Code: 6210 Main Rotor 
Blade.

    Issued in Fort Worth, Texas, on November 14, 2018.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2018-25497 Filed 11-23-18; 8:45 am]
BILLING CODE 4910-13-P