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 Department of Transportation Federal Aviation Administration 14 CFR Part 39
[Docket No. FAA-2020-1038; Project Identifier MCAI-2020-00569-E]
RIN 2120-AA64
 AGENCY: Federal Aviation Administration (FAA), DOT.
 ACTION: Notice of proposed rulemaking (NPRM).
 SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for all Safran Helicopter Engines, S.A. (Safran) Arriel 2D and Arriel 2E model turboshaft engines. This proposed AD was prompted by the manufacturer revising the maintenance and overhaul manuals to introduce new or more restrictive airworthiness limitations and maintenance tasks. This proposed AD would require the replacement of certain critical parts before reaching their published in-service life limits, performing scheduled maintenance tasks before reaching their published periodicity, and performing unscheduled maintenance tasks when the engine meets certain conditions. As a terminating action, this proposed AD would require operators to revise the airworthiness limitation section (ALS) of their existing approved aircraft maintenance program (AMP) by incorporating the revised airworthiness limitations and maintenance tasks. The FAA is proposing this AD to address the unsafe condition on these products.
 DATES: The FAA must receive comments on this proposed AD by January 14, 2021.
 ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: *Federal eRulemaking Portal:*
                         Go to 
                        *https://www.regulations.gov.*
                         Follow the instructions for submitting comments.
                    *Fax:*
                         (202) 493-2251.
                    *Mail:*
                         U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12 140, 1200 New Jersey Avenue SE, Washington, DC 20590.
                    *Hand Delivery:*
                         Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this NPRM, contact Safran Helicopter Engines, S.A., 64511 Bordes—Cedex, France; phone: (33) 05 59 74 40 00; fax: (33) 05 59 74 45 15. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (781) 238-7759. Examining the AD Docket You may examine the AD docket at 
                    *https://www.regulations.gov*
                     by searching for and locating Docket No. FAA-2020-1038; 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 NPRM, the mandatory continuing airworthiness information (MCAI), any comments received, and other 
                    ( print page 76493)
                    information. The street address for Docket Operations is listed above.
 FOR FURTHER INFORMATION CONTACT: Wego Wang, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7134; fax: (781) 238-7199; email: 
                        *wego.wang@faa.gov.*


SUPPLEMENTARY INFORMATION: Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under 
                    **ADDRESSES**
                    . Include “Docket No. FAA-2020-1038; Project Identifier MCAI-2020-00569-E” at the beginning of your comments The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend this proposal because of those comments. Except for Confidential Business Information (CBI) as described in the following paragraph, and other information as described in 14 CFR 11.35, the FAA will post all comments received, without change, to 
                    *https://www.regulations.gov,*
                     including any personal information you provide. The agency will also post a report summarizing each substantive verbal contact received about this NPRM. Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your comments responsive to this NPRM contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI as “PROPIN.” The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI should be sent to Wego Wang, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803. Any commentary that the FAA receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking. Background The European Union Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA AD 2018-0273, dated December 13, 2018 (referred to after this as “the MCAI”), to address the unsafe condition on these products. The MCAI states: The airworthiness limitations and maintenance tasks for the SAFRAN ARRIEL 2D, ARRIEL 2E and ARRIEL 2N engines, which are approved by EASA, are currently defined and published in the SAFRAN ARRIEL 2 Maintenance and Overhaul Manuals, as applicable. These instructions have been identified as mandatory for continued airworthiness. Failure to accomplish these instructions could result in an unsafe condition. SAFRAN recently revised the applicable Maintenance and Overhaul Manuals (the applicable ALS), introducing new and/or more restrictive airworthiness limitations and maintenance tasks. For the reason described above, this [EASA] AD requires accomplishment of the actions specified in the applicable ALS. You may obtain further information by examining the MCAI in the AD docket at 
                    *https://www.regulations.gov*
                     by searching for and locating Docket No. FAA-2020-1038. FAA's Determination The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of the same type design. Related Service Information Under 1 CFR Part 51 The FAA reviewed Chapter 05-10-00 of Safran Helicopter Engines ARRIEL 2D Maintenance Manual (MM) No. X292 R1 450 2, Update No. 20, dated June 15, 2020. Safran Helicopter Engines ARRIEL 2D MM X292 R1 450 2 identifies the terms used in tables for limits and mandatory maintenance tasks, usage counters of the engine log book, life limits for life-limited parts, and mandatory inspection tasks to be carried out to reach the airworthiness objectives on Safran Arriel 2D model engines. The FAA reviewed Chapter 05-10-00 of Safran Helicopter Engines ARRIEL 2E MM No. X292 R2 300 2, Update No. 16, dated June 15, 2020. Safran Helicopter Engines ARRIEL 2E MM X292 R2 300 2 identifies the terms used in tables for limits and mandatory maintenance tasks, usage counters of the engine log book, life limits for life-limited parts, and mandatory inspection tasks to be carried out to reach the airworthiness objectives on Safran Arriel 2E model engines. 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 
                    **ADDRESSES**
                    . Proposed AD Requirements in This NPRM This proposed AD would require the replacement of certain critical parts before reaching their published in-service life limits, performance of schedule maintenance tasks before reaching the published periodicity in the applicable Safran Arriel MM chapter, and performance of unscheduled maintenance tasks when the engine meets certain conditions specified in the applicable Safran Arriel MM chapter. As a terminating action, this proposed AD would require operators to revise the ALS of their existing approved AMP by incorporating the revised airworthiness limitations and maintenance tasks. Differences Between This Proposed AD and the MCAI The MCAI is applicable to Safran Arriel 2D, Arriel 2E, and Arriel 2N model turboshaft engines. This AD is only applicable to Safran Arriel 2D and 2E model turboshaft engines. Safran Arriel 2N model turboshaft engines are not type certificated in the U.S. Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 426 engines installed on helicopters of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: Estimated Costs
Action
Labor cost
Parts cost
Cost per 
                             product
Cost on U.S. 
                             operatorsRemove and replace critical parts
12 work-hours × $85 per hour = $1,020
$1,152
$2,172
$925,272Perform maintenance tasks
1 work-hour × $85 per hour = $85
1,152
1,237
526,962Revise the ALS and AMP
1 work-hour × 85 per hour = 85
0
85
36,210
 
 
 The FAA estimates the following costs to do any necessary corrective actions that would be required based on the results of the proposed maintenance tasks. The agency has no way of determining the number of aircraft that might need these actions. On-Condition Costs
Action
Labor cost
Parts cost
Cost per 
                             productPerform corrective action
1 work-hour × $85 per hour = $85
$0
$85
 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. The 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 Findings The FAA 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 above, I certify this proposed regulation: (1) Is not a “significant regulatory action” under Executive Order 12866, (2) Would not affect intrastate aviation in Alaska, and (3) Would not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. 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
 2.The FAA amends § 39.13 by adding the following new airworthiness directive: **Safran Helicopter Engines, S.A., (Type Certificate previously held by Turbomeca, S.A.):**
                         Docket No. FAA-2020-1038; Project Identifier MCAI-2020-00569-E. (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by January 14, 2021. (b) Affected ADs None. (c) Applicability This AD applies to all Safran Helicopter Engines, S.A. (Safran) (Type Certificate previously held by Turbomeca, S.A.) Arriel 2D and Arriel 2E model turboshaft engines. (d) Subject Joint Aircraft System Component (JASC) Code 7250, Turbine Section. (e) Unsafe Condition This AD was prompted by the manufacturer revising the maintenance and overhaul manuals to introduce new or more restrictive airworthiness limitations and maintenance tasks. The FAA is issuing this AD to prevent failure of the engine. The unsafe condition, if not addressed, could result in uncontained release of a critical part, damage to the engine, and damage to the helicopter. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Replace each critical part before reaching the in-service life limits specified in paragraph 1.C., “Table of authorized in-service life limits for the ARRIEL 2D,” or “Table of authorized in-service life limits for the ARRIEL 2E,” Chapter 05-10-00 of the Safran ARRIEL Maintenance Manual (MM) for that engine. (2) Before reaching the periodicity specified in paragraph 1., “Tables of Mandatory Maintenance Tasks,” table D., “Scheduled inspection,” Chapter 05-10-00 of the Safran ARRIEL MM for that engine, perform all maintenance tasks specified in table D. (3) When the engine meets the conditions specified in paragraph 1., table E., “Unscheduled inspection,” Chapter 05-10-00 of the Safran ARRIEL MM for that engine, perform the maintenance tasks specified in table E. (4) If, during performance of the maintenance tasks required by paragraph (g)(2) or (3) of this AD, a discrepancy is found, as defined in the applicable ALS, perform the corrective actions specified in paragraph 1., “Tables of Mandatory Maintenance Tasks,” table D., “Scheduled inspection,” or E. “Unscheduled inspection,” Chapter 05-10-00 of the Safran ARRIEL MM for the engine. (5) If no compliance time is identified in Chapter 05-10-00 of the Safran ARRIEL MM, perform the corrective action before further flight. (h) Exception to Paragraphs (g)(2) and (3) Where the applicable Safran ARRIEL MM chapters provide instructions to send the Module 03 to a Safran Helicopter Engines-approved repair center, the operator may choose to send the Module 03 to any FAA-approved repair center capable of performing the required actions. (i) Mandatory Terminating Action As terminating action to the requirements in paragraph (g) of this AD, within 365 days after the effective date of this AD, revise the ALS of the existing approved aircraft maintenance program (AMP) by incorporating: (i) Task 05-10-00-150-801-A01, “Airworthiness Limitations—General,” from the applicable Safran ARRIEL MM chapter. (ii) Task 05-10-00-200-801-A01, “Airworthiness Limitations—Authorized In-Service Life Limits,” from the applicable Safran ARRIEL MM chapter. (iii) Task 05-10-10-200-801-A01, “Airworthiness Limitations—Tables of Mandatory Maintenance Tasks,” from the applicable Safran ARRIEL MM chapter. (j) Definitions (1) For the purpose of this AD, a “critical part” is a part identified in paragraph 1.C., “Table of authorized in-service life limits for the ARRIEL 2D,” or “Table of authorized in-service life limits for the ARRIEL 2E,” 
                        ( print page 76495)
                        Chapter 05-10-00 of the Safran ARRIEL MM for that engine. (2) For the purpose of this AD, the “Chapter 05-10-00 of the Safran ARRIEL MM” is: (i) Chapter 05-10-00 of Safran Aircraft Engines ARRIEL 2D MM No. X292 R1 450 2, Update No. 20, dated June 15, 2020; or (ii) Chapter 05-10-00 of Safran Aircraft Engines ARRIEL 2E MM No. X292 R2 300 2, Update No. 16, dated June 15, 2020. (3) For the purpose of this AD, the “approved maintenance program” is defined as the basis for which the operator ensures the continuing airworthiness of each operated helicopter. (k) Credit for Previous Actions (1) For affected Safran Arriel 2D model turboshaft engines, you may take credit for revising the ALS of the existing approved AMP that is required by paragraph (i) of this AD if you incorporated the tasks before the effective date of this AD using Chapter 05-10-00 of Safran ARRIEL 2D MM No. X292 R1 450 2, Update No. 19, dated December 30, 2019. (2) For affected Safran Arriel 2E model turboshaft engines, you may take credit for revising the ALS of the existing approved AMP that is required by paragraph (i) of this AD if you incorporated the tasks before the effective date of this AD using Chapter 05-10-00 of Safran ARRIEL 2E MM No. X292 R2 300 2, Update No. 15, dated December 30, 2019. (l) Alternative Methods of Compliance (AMOCs) (1) The Manager, ECO 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 Related Information. You may email your request to: 
                        *ANE-AD-AMOC@faa.gov.* (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. (m) Related Information (1) For more information about this AD, contact Wego Wang, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238-7134; fax: (781) 238-7199; email: 
                        *wego.wang@faa.gov.* (2) Refer to European Union Aviation Safety Agency (EASA) AD 2018-0273, dated December 13, 2018, for more information. You may examine the EASA AD in the AD docket at 
                        *https://www.regulations.gov*
                         by searching for and locating it in Docket No. FAA-2020-1038. (3) For service information identified in this AD, contact Safran Helicopter Engines, S.A., 64511 Bordes—Cedex, France; phone: (33) 05 59 74 40 00; fax: (33) 05 59 74 45 15. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (781) 238-7759. Issued on November 24, 2020. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.


[FR Doc. 2020-26337 Filed 11-27-20; 8:45 am] BILLING CODE 4910-13-P