2022-22698. Airworthiness Directives; Alexander Schleicher GmbH & Co. Segelflugzeugbau Gliders

AGENCY:

Federal Aviation Administration (FAA), DOT.

ACTION:

Notice of proposed rulemaking (NPRM).

SUMMARY:

The FAA proposes to supersede Airworthiness Directive (AD) 2022-14-14, which applies to all Alexander Schleicher GmbH & Co. Segelflugzeugbau Model ASW-15 gliders. AD 2022-14-14 requires repetitively inspecting the wing root ribs for cracks, looseness, and damage and replacing any root rib with a crack, a loose rib or lift pin bushing, or any damage. Since the FAA issued AD 2022-14-14, the European Union Aviation Safety Agency (EASA) superseded its mandatory continuing airworthiness information (MCAI) to add all Model ASW-15B gliders to the applicability. This proposed AD is prompted by MCAI originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. This proposed AD would retain the requirements from AD 2022-14-14 of repetitively inspecting the wing root ribs for cracks, looseness, and damage and replacing any root rib with a crack, a loose rib or lift pin bushing, or any damage; and would add the Model ASW-15B gliders to the applicability. The FAA is proposing this AD to address the unsafe condition on these products.

DATES:

The FAA must receive comments on this NPRM by December 12, 2022.

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-2022-1303; 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 MCAI, any comments received, and other information. The street address for Docket Operations is listed above.

Material Incorporated by Reference:

• For service information identified in this NPRM, contact Alexander Schleicher GmbH & Co. Segelflugzeugbau, Alexander-Schleicher-Str. 1, Poppenhausen, Germany D-36163; phone: [phone]; email: [e-mail]; website: alexander-schleicher.de.

• You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call [phone].

FOR FURTHER INFORMATION CONTACT:

Jim Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106; phone: [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-2022-1303; Project Identifier MCAI-2022-01001-G” 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 the 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 Jim Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106. 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 FAA issued AD 2022-14-14, Amendment 39-22119 (87 FR 43403, July 21, 2022), (AD 2022-14-14), for all serial-numbered Alexander Schleicher GmbH & Co. Segelflugzeugbau Model ASW-15 gliders. AD 2022-14-14 was prompted by MCAI originated by EASA, which is the Technical Agent for the Member States of the European Union. EASA issued EASA AD 2021-0187, dated August 9, 2021 (EASA AD 2021-0187), for all Alexander Schleicher GmbH & Co. Segelflugzeugbau Model ASW 15 gliders to correct an unsafe condition identified as wing root rib damage.

AD 2022-14-14 requires repetitively inspecting the wing root ribs for cracks, looseness, and damage and replacing any root rib with a crack, a loose rib or lift pin bushing, or any damage. The FAA issued AD 2022-14-14 to detect and correct damaged root ribs.

Actions Since AD 2022-14-14 Was Issued

Since the FAA issued AD 2022-14-14, Alexander Schleicher GmbH & Co. Segelflugzeugbau determined that Model ASW-15B gliders can also be affected by wing root rib damage. As a result, EASA superseded EASA AD 2021-0187, and issued EASA AD 2022-0146, dated July 11, 2022 (referred to after this as “the MCAI”). The MCAI states that wing root rib damage can also affect Model ASW-15B gliders and the Model ASW-15B as well as the ASW-15 gliders require repetitively inspecting the wing root ribs and replacing any damaged wing root ribs. The MCAI retains the requirements of EASA AD 2021-0187 and expands the applicability to include all Model ASW-15B gliders.

You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA-2022-1303.

Related Service Information Under 1 CFR Part 51

The FAA reviewed Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Technical Note No. 29, Issue II (TN No. 29, Issue II), dated May 4, 2022. This service information specifies replacement of root ribs.

This proposed AD would also require Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Technical Note No. 29, dated June 28, 2021; Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Repair instruction exchange of wing root ribs according to TN 29, dated June 28, 2021; and Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Maintenance Instruction G, Issue 1, dated June 28, 2021, which the Director of the Federal Register approved for incorporation by reference as of August 25, 2022 (87 FR 43403, July 21, 2022).

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 .

FAA's Determination

These products have been approved by the aviation authority of another country and are approved for operation in the United States. Pursuant to the FAA's bilateral agreement with this State of Design Authority, it has notified the FAA of the unsafe condition described in the MCAI and service information described above. The FAA is issuing this NPRM after determining that the unsafe condition described previously is likely to exist or develop on other products of these same type designs.

Proposed AD Requirements in This NPRM

This proposed AD would retain all of the requirements of AD 2022-14-14, would add Model ASW-15B gliders to the applicability, and would provide the option of using the service material from AD 2022-14-14 or the updated service material.

Differences Between This Proposed AD and the Service Information

TN No. 29, Issue II, specifies the exchange of page 22A and page 27A of the Flight and Operations Manual for the Model ASW-15 and ASW-15B gliders, respectively, with a new version of those pages and then specifies documenting this change on page 3, Amendments, of the respective manual, and the MCAI, and this proposed AD do not.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would affect 29 gliders 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. operators
Inspect root ribs	1 work-hour × $85 per hour = $85	Not Applicable	$85 per product per inspection cycle	$2,465 per inspection cycle.

The FAA estimates the following costs to do any necessary replacements that would be required based on the results of the proposed inspection. The agency has no way of determining the number of gliders that might need these replacements:

On-Condition Costs

Action	Labor cost	Parts cost	Cost per product
Replace all four root ribs	8 work-hours × $85 per hour = $680	$1,000	$1,680

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 that the 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 2022-14-14, Amendment 39-22119 ( 87 FR 43403, July 21, 2022); and

b. Adding the following new airworthiness directive:

Alexander Schleicher GmbH & Co. Segelflugzeugbau: Docket No. FAA-2022-1303; Project Identifier MCAI-2022-01001-G.

(a) Comments Due Date

The FAA must receive comments on this airworthiness directive (AD) by December 12, 2022.

(b) Affected ADs

This AD replaces AD 2022-14-14, Amendment 39-22119 (87 FR 43403, July 21, 2022) (AD 2022-14-14).

(c) Applicability

This AD applies to Alexander Schleicher GmbH & Co. Segelflugzeugbau Model ASW-15 and ASW-15B gliders, all serial numbers, certificated in any category.

(d) Subject

Joint Aircraft System Component (JASC) Code 5712, Wing, Rib/Bulkhead.

(e) Unsafe Condition

This AD was prompted by mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as wing root rib damage. The FAA is issuing this AD to detect and correct damaged root ribs. The unsafe condition, if not addressed, could result in reduced structural integrity of the wing assembly, which could lead to loss of control of the glider.

(f) Compliance

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

(g) Action

(1) For Model ASW-15 gliders: Within 30 days after August 25, 2022 (effective date of AD 2022-14-14), and thereafter at intervals not to exceed 12 months, inspect all wing root ribs (4 places) for cracks, looseness, and damage, in accordance with the Action section in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Maintenance Instruction G, Issue 1, dated June 28, 2021. If there is a crack in any root rib, a loose rib or lift pin bushing, or any damage, before further flight, replace the root rib in accordance with Action paragraph (B) in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Technical Note No. 29, dated June 28, 2021, and steps 1 through 7 in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Repair instruction exchange of wing root ribs according to TN 29, dated June 28, 2021; or Action paragraph (C) in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Technical Note No. 29, Issue II, dated May 4, 2022, and steps 1 through 7 in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Repair instruction exchange of wing root ribs according to TN 29, dated June 28, 2021.

(2) For Model ASW-15B gliders: Within 30 days after the effective date of this AD and thereafter at intervals not to exceed 12 months, inspect all wing root ribs (4 places) for cracks, looseness, and damage, in accordance with the Action section in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Maintenance Instruction G, Issue 1, dated June 28, 2021. If there is a crack in any root rib, a loose rib or lift pin bushing, or any damage, before further flight, replace the root rib in accordance with Action paragraph (C) in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Technical Note No. 29, Issue II, dated May 4, 2022, and steps 1 through 7 in Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Repair instruction exchange of wing root ribs according to TN 29, dated June 28, 2021.

(3) For Model ASW-15 and ASW-15B gliders: Replacing all four wing root ribs is terminating action for the repetitive inspections required by this AD.

(h) Alternative Methods of Compliance (AMOCs)

The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in § 39.19. In accordance with § 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, mail it to the address identified in paragraph (i)(2) of this AD or email to: [e-mail]. If mailing information, also submit information by email. 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.

(i) Additional Information

(1) Refer to European Union Aviation Safety Agency (EASA) AD 2022-0146, dated July 11, 2022, for related information. This EASA AD may be found in the AD docket at regulations.gov under Docket No. FAA-2022-1303.

(2) For more information about this AD, contact Jim Rutherford, Aviation Safety Engineer, General Aviation & Rotorcraft Section, International Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106; phone: [phone]; email: [e-mail].

(j) Material Incorporated by Reference

(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.

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

(3) The Director of the Federal Register approved the following service information for incorporation by reference on November 30, 2022.

(i) Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Technical Note No. 29, Issue II dated May 4, 2022.

(ii) [Reserved]

(4) The Director of the Federal Register approved the following service information for incorporation by reference on August 25, 2022 (87 FR 43403, July 21, 2022)

(i) Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Maintenance Instruction G, Issue 1, dated June 28, 2021.

(ii) Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Repair instruction exchange of wing root ribs according to TN 29, dated June 28, 2021.

(iii) Alexander Schleicher GmbH & Co. Segelflugzeugbau ASW 15 Technical Note No. 29, dated June 28, 2021.

(5) For service information identified in this AD, contact Alexander Schleicher GmbH & Co. Segelflugzeugbau, Alexander-Schleicher-Str. 1, Poppenhausen, Germany D-36163; phone: [phone]; email: [e-mail]; website: alexander-schleicher.de.

(6) You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call [phone].

(7) 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, email: [e-mail], or go to: www.archives.gov/​federal-register/​cfr/​ibr-locations.html.

Issued on October 13, 2022.

Christina Underwood,

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