2024-04953. Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters

AGENCY:

Federal Aviation Administration (FAA), DOT.

ACTION:

Notice of proposed rulemaking (NPRM).

SUMMARY:

The FAA proposes to supersede Airworthiness Directive (AD) 2021–11–17 and AD 2021–11–22, which apply to all Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters. AD 2021–11–17 requires a one-time visual inspection of certain part-numbered main rotor actuators (MRAs). AD 2021–11–22 requires revising the life limits of certain parts and removing each part that has reached its life limit. Since the FAA issued those ADs, it was determined that repetitive inspections of the MRAs are necessary, new and more restrictive tasks and limitations have been issued, and that it is necessary to expand the applicability. This proposed AD would continue to require the actions required by AD 2021–11–17 and AD 2021–11–22, except this proposed AD would require changing the one-time MRA inspection to a repetitive inspection and incorporating other new and more restrictive tasks and limitations by revising the airworthiness limitations section (ALS) of the existing helicopter maintenance manual or instructions for continued airworthiness and the existing approved maintenance or inspection program, as applicable. This proposed AD would also expand the applicability by adding Model EC635T2+ helicopters. These actions are specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. 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 April 25, 2024.

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 regulations.gov. Follow the instructions for submitting comments.

• Fax: [phone].

• 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.

AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–0462; 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, any comments received, and other information. The street address for Docket Operations is listed above.

Material Incorporated by Reference:

• For EASA material identified in this NPRM, contact Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone [phone]; email [e-mail]; website easa.europa.eu. You may find the EASA material on the EASA website ad.easa.europa.eu.

• You may view this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Parkway, Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222–5110. The EASA material is also available at regulations.gov under Docket No. FAA–2024–0462.

Other Related Service Information: For Airbus service information identified in this NPRM, contact Airbus Helicopters, 2701 North Forum Drive, Grand Prairie, TX 75052; telephone [phone] or (800) 232–0323; fax [phone]; or website airbus.com/en/products-services/helicopters/hcare-services/airbusworld. You may also view this service information at the FAA contact information under Material Incorporated by Reference above.

FOR FURTHER INFORMATION CONTACT:

Joe Salameh, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone [phone]; email [e-mail].

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–2024–0462; Project Identifier MCAI–2022–00523–R” 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 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 Joe Salameh, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone [phone]; email [e-mail]. Any commentary that the FAA receives that is not specifically designated as CBI will be placed in the public docket for this rulemaking.

Background

The FAA issued AD 2021–11–17, Amendment 39–21579 (86 FR 31087, June 11, 2021) (AD 2021–11–17), for all Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters. AD 2021–11–17 requires a one-time visual inspection of the MRA. The FAA issued AD 2021–11–17 to prevent failure of the MRA and subsequent loss of control of the helicopter.

The FAA issued AD 2021–11–22, Amendment 39–21584 (86 FR 31101, June 11, 2021) (AD 2021–11–22), for Airbus Helicopters Deutschland GmbH Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters. AD 2021–11–22 requires revising the life limit of certain parts and removing from service each part that has reached its life limit. The FAA issued AD 2021–11–22 to prevent certain parts from remaining in service beyond their fatigue life, resulting in failure of the part and subsequent loss of control of the helicopter.

Actions Since AD 2021–11–17 and AD 2021–11–22 Were Issued

Since the FAA issued AD 2021–11–17 and AD 2021–11–22, EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 2022–0067, dated April 13, 2022 (EASA AD 2022–0067), to correct an unsafe condition on Airbus Helicopters Deutschland GmbH Model EC135 P1, EC135 P2, EC135 P2+, EC135 P3, EC135 T1, EC135 T2, EC135 T2+, EC135 T3, EC635 P2+, EC635 P3, EC635 T1, EC635 T2+, and EC635 T3 helicopters. You may examine EASA AD 2022–0067 in the AD docket at regulations.gov under Docket No. FAA–2024–0462.

Since the FAA issued AD 2021–11–17 and AD 2021–11–22, the FAA has also determined that it is necessary to expand the applicability by adding Model EC635T2+ helicopters. While the FAA type certificate data sheet for this model helicopter notes that import of this model helicopter is limited to serial number 0858 and that no other serial numbers are eligible for conversion and import, notes in a type certificate data sheet can change. Additionally, because the unsafe condition is likely to exist or develop on Model EC635T2+ helicopters, the FAA must issue an AD that applies to this model helicopter.

This proposed AD was prompted by new and more restrictive tasks and airworthiness limitations and the determination to expand the applicability. The FAA is proposing this AD to prevent failure of certain parts, which, if not addressed, could result in subsequent loss of control of the helicopter.

Related Service Information Under 1 CFR Part 51

EASA AD 2022–0067 requires replacing components before exceeding their life limits and accomplishing maintenance tasks within thresholds and intervals specified in the applicable ALS as defined in EASA AD 2022–0067. Depending on the results of the maintenance tasks, EASA AD 2022–0067 requires accomplishing corrective action(s) or contacting AHD [Airbus Helicopters Deutschland GmbH AHD] for approved instructions and accomplishing those instructions. EASA AD 2022–0067 also requires revising the Aircraft Maintenance Programme (AMP) by incorporating the limitations, tasks, and associated thresholds and intervals described in the specified ALS as applicable to helicopter model and configuration. Revising the AMP constitutes terminating action for the requirements to replace components before exceeding their life limits and accomplish maintenance tasks within thresholds and intervals specified in the applicable ALS as required by EASA AD 2022–0067.

This material 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.

Other Related Service Information

The FAA also reviewed Airbus Chapter 04 ALS for EC135 P1, P2, P3, T1, T2, T3, limited to CDS, CPDS, P2+, T2+ helicopters, Revision 2, dated April 6, 2021, and Airbus Chapter 04 ALS for EC135 P3H and T3H helicopters, Revision 2, dated April 6, 2021. This service information specifies airworthiness limitations, tasks, and associated thresholds and intervals for various parts. Revision 2 of this service information specifies various updates for certain components.

FAA's Determination

These helicopters have been approved by EASA and are approved for operation in the United States. Pursuant to the FAA's bilateral agreement with the European Union, EASA has notified the FAA about the unsafe condition described in its AD. The FAA is proposing this AD after evaluating all known relevant information and determining that the unsafe condition described previously is likely to exist or develop on other helicopters of these same type designs.

Proposed AD Requirements in This NPRM

This proposed AD would require accomplishing the actions specified in EASA AD 2022–0067, described previously, as incorporated by reference, except for any differences identified as exceptions in the regulatory text of this proposed AD and except as discussed under “Differences Between this Proposed AD and the EASA AD.”

Explanation of Required Compliance Information

In the FAA's ongoing efforts to improve the efficiency of the AD process, the FAA developed a process to use some civil aviation authority (CAA) ADs as the primary source of information for compliance with requirements for corresponding FAA ADs. The FAA has been coordinating this process with manufacturers and CAAs. As a result, the FAA proposes to incorporate EASA AD 2022–0067 by reference in the FAA final rule. Using common terms that are the same as the heading of a particular section in EASA AD 2022–0067 does not mean that operators need comply only with that section. For example, where the AD requirement refers to “all required actions and compliance times,” compliance with this AD requirement is not limited to the section titled “Required Action(s) and Compliance Time(s)” in EASA AD 2022–0067. Service information referenced in EASA AD 2022–0067 for compliance will be available at regulations.gov under Docket No. FAA–2024–0462 after the FAA final rule is published.

Differences Between This Proposed AD and the EASA AD

EASA AD 2022–0067 applies to Model EC635 P2+, EC635 P3, EC635 T1, and EC635 T3 helicopters, whereas this proposed AD would not because these model helicopters are not FAA type-certificated.

EASA AD 2022–0067 requires replacing certain components before exceeding applicable life limits, accomplishing certain maintenance tasks within thresholds and intervals as specified in the ALS, as defined within, and depending on the results, accomplishing corrective action within the compliance time specified in that ALS. EASA AD 2022–0067 also requires revising the approved AMP to incorporate the limitations, tasks, and associated thresholds and intervals described in that ALS within 12 months after its effective date. Whereas, this proposed AD would require revising existing documents and programs within 30 days to incorporate the limitations, tasks, and associated thresholds and intervals described in that ALS, and clarifies that if the initial instance of an incorporated limitation or threshold therein is reached before 30 days after the effective date of the final rule of this proposed AD, you still have up to 30 days after the effective date of the final rule of this proposed AD to accomplish the corresponding task.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would affect 272 helicopters of U.S. Registry. Labor rates are estimated at $85 per work-hour. Based on these numbers, the FAA estimates the following costs to comply with this proposed AD.

Revising the ALS of the existing helicopter maintenance manual or instructions for continued airworthiness for your helicopter and the existing approved maintenance or inspection program for your helicopter, as applicable, would take approximately 2 work-hours, for an estimated cost of $170 per helicopter and $46,240 for the U.S. fleet.

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

[Amended]

2. The FAA amends § 39.13 by:

a. Removing airworthiness directive (AD) 2021–11–17, Amendment 39–21579 ( 86 FR 31087, June 11, 2021); and AD 2021–11–22, Amendment 39–21584 (86 FR 31101, June 11, 2021); and

b. Adding the following new AD:

Airbus Helicopters Deutschland GmbH (AHD): Docket No. FAA–2024–0462; Project Identifier MCAI–2022–00523–R.

(a) Comments Due Date

The FAA must receive comments on this airworthiness directive (AD) by April 25, 2024.

(b) Affected ADs

This AD replaces AD 2021–11–17, Amendment 39–21579 (86 FR 31087, June 11, 2021), and AD 2021–11–22, Amendment 39–21584 (86 FR 31101, June 11, 2021).

Note 1 to paragraph (b):

The requirements of this AD capture the latest tasks and life limits required to prevent the unsafe conditions addressed by the ADs that are identified in paragraph (b) of this AD.

(c) Applicability

This AD applies to Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, EC135T3, and EC635T2+ helicopters, certificated in any category.

Note 2 to paragraph (c):

Helicopters with an EC135P3H designation are Model EC135P3 helicopters, and helicopters with an EC135T3H designation are Model EC135T3 helicopters.

(d) Subject

Joint Aircraft Service Component (JASC) Code: 6310, Main Rotor Control.

(e) Unsafe Condition

This AD was prompted by new and more restrictive airworthiness limitations. The FAA is issuing this AD to prevent failure of certain parts, which if not addressed, could result in subsequent loss of control of the helicopter.

(f) Compliance

Comply with this AD within the compliance times specified, unless already done.

(g) Required Action

Except as specified in paragraphs (h) and (i) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2022–0067, dated April 13, 2022 (EASA AD 2022–0067).

(h) Exceptions to EASA AD 2022–0067

(1) Where EASA AD 2022–0067 refers to its effective date, this AD requires using the effective date of this AD.

(2) This AD does not adopt the requirements specified in paragraphs (1), (2), (4), and (5) of EASA AD 2022–0067.

(3) Where paragraph (3) of EASA AD 2022–0067 specifies “Within 12 months after the effective date of this AD, revise the approved AMP,” this AD requires replacing that text with “Within 30 days after the effective date of this AD, revise the airworthiness limitations section of your existing helicopter maintenance manual or instructions for continued airworthiness and your existing approved maintenance or inspection program, as applicable.”

(4) The initial compliance time for doing the tasks specified in paragraph (3) of EASA AD 2022–0067 is on or before the applicable “limitations” and “associated thresholds” as incorporated by the requirements of paragraph (3) of EASA AD 2022–0067, or within 30 days after the effective date of this AD, whichever occurs later.

(5) This AD does not adopt the “Remarks” section of EASA AD 2022–0067.

(i) Provisions for Alternative Actions and Intervals

No alternative actions and associated thresholds and intervals, including life limits, are allowed for compliance with paragraph (g) of this AD unless they are approved as specified in the provisions of the “Ref. Publications” section of EASA AD 2022–0067.

(j) Special Flight Permits

Special flight permits may be issued in accordance with 14 CFR 21.197 and 21.199, provided no passengers are onboard.

(k) Alternative Methods of Compliance (AMOCs)

(1) The Manager, International Validation 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 International Validation Branch, send it to the attention of the person identified in paragraph (l) of this AD. Information may be emailed to: [e-mail].

(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.

(l) Related Information

For more information about this AD, contact Joe Salameh, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone [phone]; email [e-mail].

(m) Material Incorporated by Reference

(1) The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.

(2) You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise.

(i) European Union Aviation Safety Agency (EASA) AD 2022–0067, dated April 13, 2022.

(ii) [Reserved]

(3) For EASA AD 2022–0067, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone [phone]; email [e-mail]; website easa.europa.eu. You may find the EASA material on the EASA website ad.easa.europa.eu.

(4) You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Parkway, Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222–5110.

(5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/[e-mail].

Issued on March 4, 2024.

Victor Wicklund,

Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service.