Airworthiness Directives; Learjet, Inc., Airplanes, 49556-49559 [2022-16680]

Download as PDF 49556 Federal Register / Vol. 87, No. 154 / Thursday, August 11, 2022 / Proposed Rules Operational Safety Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222–5110; email kristin.bradley@faa.gov. resulting in damage to the helicopter and injury to occupants. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements 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, EASA AD 2022– 0056. (h) Exceptions to EASA AD 2022–0056 (1) Where EASA AD 2022–0056 requires compliance in terms of flight hours, this AD requires using hours time-in-service. (2) Where EASA AD 2022–0056 refers to its effective date, this AD requires using the effective date of this AD. (3) Where the service information referenced in EASA AD 2022–0056 specifies discarding parts, this AD requires removing those parts from service. (4) This AD does not mandate compliance with the ‘‘Remarks’’ section of EASA AD 2022–0056. (i) No Reporting Requirement Although the service information referenced in EASA AD 2022–0056 specifies to submit certain information to the manufacturer, this AD does not include that requirement. lotter on DSK11XQN23PROD with PROPOSALS1 (j) 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 (k)(2) of this AD. Information may be emailed to: 9-AVS-AIR730-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. (k) Related Information (1) For EASA AD 2022–0056, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find the EASA material on the EASA website at https://ad.easa.europa.eu. You may view this material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222–5110. This material may be found in the AD docket at www.regulations.gov by searching for and locating Docket No. FAA–2022–0881. (2) For more information about this AD, contact Kristi Bradley, Program Manager, COS Program Management Section, VerDate Sep<11>2014 17:04 Aug 10, 2022 Jkt 256001 Issued on July 20, 2022. Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022–16887 Filed 8–10–22; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2022–0991; Project Identifier AD–2022–00155–T] RIN 2120–AA64 Airworthiness Directives; Learjet, Inc., Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: The FAA proposes to adopt a new airworthiness directive (AD) for all Learjet, Inc., Model 45 airplanes. This proposed AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This proposed AD would require revising the existing inspection program to incorporate reduced inspection intervals for the anti-ice manifold assembly. 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 September 26, 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 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 Learjet, Inc., One Learjet Way, Wichita, KS 67209–2942; telephone 316–946–2000; fax 316–946– SUMMARY: PO 00000 Frm 00020 Fmt 4702 Sfmt 4702 2220; email ac.ict@ aero.bombardier.com; internet www.bombardier.com. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. Examining the AD Docket You may examine the AD docket at www.regulations.gov by searching for and locating Docket No. FAA–2022– 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 NPRM, any comments received, and other information. The street address for Docket Operations is listed above. FOR FURTHER INFORMATION CONTACT: Adam Hein, Aerospace Engineer, Mechanical Systems and Propulsion Section, FAA, Wichita ACO Branch, 1801 S Airport Road, Wichita, KS 67209; telephone (316) 946–4116; email: adam.hein@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–2022–0991; Project Identifier AD– 2022–00155–T’’ 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 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 E:\FR\FM\11AUP1.SGM 11AUP1 Federal Register / Vol. 87, No. 154 / Thursday, August 11, 2022 / Proposed Rules 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 Adam Hein, Aerospace Engineer, Mechanical Systems and Propulsion Section, FAA, Wichita ACO Branch, 1801 S Airport Road, Wichita, KS 67209; telephone (316) 946–4116; email: adam.hein@ faa.gov. 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 2001–03–05, Amendment 39–12109 (66 FR 10353, February 15, 2001) (AD 2001–03–05), for certain Learjet Model 45 airplanes. AD 2001–03–05 requires, among other actions, revising the existing Learjet 45 maintenance program to incorporate additional inspections and maintenance practices for the anti-ice manifold assembly. AD 2001–03–05 resulted from anti-ice system difficulties on a Learjet Model 45 airplane, generating a warning to the flightcrew of an overheat condition of the horizontal stabilizer. The FAA issued AD 2001–03–05 to address metal fragments breaking off the anti-ice manifold assembly due to fatigue, which could block a duct in the anti-ice system and result in an unannunciated loss of ice protection. AD 2001–03–05 mandates a 600-hour repetitive inspection interval of an earlier design/part number of the anti- ice manifold as specified in the Learjet 45 maintenance program revision. The part was subsequently redesigned outside the scope of AD 2001–03–05, and the inspection interval for airplanes with the redesigned part was extended to 1,200 flight hours by Learjet. Since the FAA issued AD 2001–03– 05, the design approval holder determined that the design improvements made to the anti-ice manifold assembly did not fully address the original issue of vane cracking, so the 1,200-hour inspection on the redesigned part is insufficient. However, the FAA determined that a repetitive inspection interval of 600 flight hours is sufficient to address the unsafe condition. Therefore, this proposed AD would require revising the existing inspection program to incorporate a reduced 600-hour inspection interval for the redesigned part. Accomplishing the proposed actions would terminate the requirements of paragraph (c) of AD 2001–03–05. The FAA is proposing this AD to address metal fragments breaking off the anti-ice manifold assembly due to fatigue, which could block a duct in the anti-ice system and result in an unannunciated loss of ice protection and subsequent loss of control of the airplane. 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 Learjet 40 Maintenance Manual Temporary 49557 Revision (TR) 04–33 and Learjet 45 Maintenance Manual TR 04–48, both dated January 18, 2022. This service information specifies reduced inspection intervals for the anti-ice manifold assembly. 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 revising the existing inspection program to incorporate reduced inspection intervals for the anti-ice manifold assembly. This proposed AD would require revisions to certain operator maintenance documents to include new actions (e.g., inspections). Compliance with these actions is required by 14 CFR 91.403(c). For airplanes that have been previously modified, altered, or repaired in the areas addressed by this proposed AD, the operator may not be able to accomplish the actions described in the revisions. In this situation, to comply with 14 CFR 91.403(c), the operator must request approval for an alternative method of compliance according to paragraph (k) of this proposed AD. Costs of Compliance The FAA estimates that this AD, if adopted as proposed, would affect 443 airplanes of U.S. registry. The FAA estimates the following costs to comply with this proposed AD: ESTIMATED COSTS Action Labor cost Inspection program revision ............................ 1 work-hour × $85 per hour = $85 ................. lotter on DSK11XQN23PROD with PROPOSALS1 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 VerDate Sep<11>2014 17:04 Aug 10, 2022 Jkt 256001 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 PO 00000 Frm 00021 Fmt 4702 Sfmt 4702 Cost per product Parts cost $0 $85 Cost on U.S. operators $37,655 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 E:\FR\FM\11AUP1.SGM 11AUP1 49558 Federal Register / Vol. 87, No. 154 / Thursday, August 11, 2022 / Proposed Rules 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: ■ lotter on DSK11XQN23PROD with PROPOSALS1 Learjet, Inc.: Docket No. FAA–2022–0991; Project Identifier AD–2022–00155–T. (i) For airplanes with more than 600 flight hours since the most recent inspection of the anti-ice manifold assembly was performed as of the effective date of this AD: Do the inspection within 100 flight hours or 60 days after the effective date of this AD, whichever occurs first. (ii) For airplanes with 600 flight hours or less since the most recent inspection of the anti-ice manifold assembly was performed as of the effective date of this AD: Do the inspection within 600 flight hours after the most recent inspection or within 100 flight hours after the effective date of this AD, whichever occurs later. (h) No Alternative Actions or Intervals After the existing inspection program has been revised as required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals, may be used unless VerDate Sep<11>2014 17:04 Aug 10, 2022 Jkt 256001 (a) Comments Due Date The FAA must receive comments on this airworthiness directive (AD) by September 26, 2022. (b) Affected ADs This AD affects AD 2001–03–05, Amendment 39–12109 (66 FR 10353, February 15, 2001) (AD 2001–03–05). (c) Applicability This AD applies to all Learjet, Inc., Model 45 (Learjet 40), Model 45 (Learjet 45), Model 45 (Learjet 70), and Model 45 (Learjet 75) airplanes, serial numbers 45–002 through 45– 556 inclusive, and 45–2001 through 45–2146 inclusive, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 36, Pneumatic. (e) Unsafe Condition This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. The FAA is issuing this AD to address metal fragments breaking off the anti-ice manifold assembly due to fatigue, which could block a duct in the antiice system and result in an unannunciated loss of ice protection and subsequent loss of control of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. the actions and intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (k) of this AD. (i) Terminating Action for Paragraph (c) of AD 2001–03–05 Accomplishing the revision of the existing inspection program required by paragraph (g) of this AD terminates the requirements of paragraph (c) of AD 2001–03–05. (j) Special Flight Permit Special flight permits may be issued in accordance with 14 CFR 21.197 and 21.199 to operate the airplane to a location where the airplane can be inspected, provided the airplane is restricted from flying into known icing conditions. PO 00000 Frm 00022 Fmt 4702 Sfmt 4702 (g) Maintenance or Inspection Program Revision (1) For Learjet 40 and 45 variants: Within 60 days after the effective date of this AD, revise the existing inspection program by incorporating the information in Learjet 40 Maintenance Manual Temporary Revision (TR) 04–33 or Learjet 45 Maintenance Manual TR 04–48, both dated January 18, 2022, as applicable. The initial compliance time for the inspection is at the applicable time specified in paragraph (g)(1)(i) or (ii) of this AD. (i) For airplanes with more than 600 flight hours since the most recent inspection of the anti-ice manifold assembly was performed as of the effective date of this AD: Do the inspection within 100 flight hours or 60 days after the effective date of this AD, whichever occurs first. (ii) For airplanes with 600 flight hours or less since the most recent inspection of the anti-ice manifold assembly was performed as of the effective date of this AD: Do the inspection within 600 flight hours after the most recent inspection or within 100 flight hours after the effective date of this AD, whichever occurs later. (2) For Learjet 70 and 75 variants: Within 60 days after the effective date of this AD, revise the existing inspection program to incorporate the information identified in figure 1 to paragraph (g)(2) of this AD. The initial compliance time for the inspection is at the applicable time specified in paragraph (g)(2)(i) or (ii) of this AD. (k) Alternative Methods of Compliance (AMOCs) (1) The Manager, Wichita ACO 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to the attention of the person identified in paragraph (l)(1) of this AD. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (l) Related Information (1) For more information about this AD, contact Adam Hein, Aerospace Engineer, E:\FR\FM\11AUP1.SGM 11AUP1 EP11AU22.012</GPH> (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. Federal Register / Vol. 87, No. 154 / Thursday, August 11, 2022 / Proposed Rules Mechanical Systems and Propulsion Section, FAA, Wichita ACO Branch, 1801 S Airport Road, Wichita, KS 67209; telephone (316) 946–4116; email: adam.hein@faa.gov. (2) For service information identified in this AD, contact Learjet, Inc., One Learjet Way, Wichita, KS 67209–2942; telephone 316–946–2000; fax 316–946–2220; email ac.ict@aero.bombardier.com; internet www.bombardier.com. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. Issued on July 29, 2022. Christina Underwood, Acting Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2022–16680 Filed 8–10–22; 8:45 am] BILLING CODE 4910–13–P COMMODITY FUTURES TRADING COMMISSION 17 CFR Part 39 RIN 3038–AF15 Governance Requirements for Derivatives Clearing Organizations Commodity Futures Trading Commission. ACTION: Notice of proposed rulemaking. AGENCY: The Commodity Futures Trading Commission (CFTC or Commission) is proposing amendments to require derivatives clearing organizations (DCOs) to establish and consult with one or more risk management committees (RMCs) comprised of clearing members and customers of clearing members on matters that could materially affect the risk profile of the DCO. In addition, the Commission proposes establishing minimum requirements for RMC composition and rotation, and requiring DCOs to establish and enforce fitness standards for RMC members. The Commission also proposes requiring DCOs to maintain written policies and procedures governing the RMC consultation process and the role of RMC members. Finally, the Commission is proposing to require DCOs to establish one or more market participant risk advisory working groups (RWGs) that must convene at least quarterly, and adopt written policies and procedures related to the formation and role of the RWG. DATES: Comments must be received by October 11, 2022. ADDRESSES: You may submit comments, identified by ‘‘Governance lotter on DSK11XQN23PROD with PROPOSALS1 SUMMARY: VerDate Sep<11>2014 17:04 Aug 10, 2022 Jkt 256001 Requirements for Derivatives Clearing Organizations’’ and RIN number 3038– AF15, by any of the following methods: • CFTC Comments Portal: https:// comments.cftc.gov. Select the ‘‘Submit Comments’’ link for this rulemaking and follow the instructions on the Public Comment Form. • Mail: Send to Christopher Kirkpatrick, Secretary of the Commission, Commodity Futures Trading Commission, Three Lafayette Centre, 1155 21st Street NW, Washington, DC 20581. • Hand Delivery/Courier: Follow the same instructions as for Mail, above. Please submit your comments using only one of these methods. To avoid possible delays with mail or in-person deliveries, submissions through the CFTC Comments Portal are encouraged. All comments must be submitted in English, or if not, accompanied by an English translation. Comments will be posted as received to https:// comments.cftc.gov. You should submit only information that you wish to make available publicly. If you wish the Commission to consider information that you believe is exempt from disclosure under the Freedom of Information Act (FOIA), a petition for confidential treatment of the exempt information may be submitted according to the procedures established in § 145.9 of the Commission’s regulations.1 The Commission reserves the right, but shall have no obligation, to review, pre-screen, filter, redact, refuse or remove any or all of your submission from https://comments.cftc.gov that it may deem to be inappropriate for publication, such as obscene language. All submissions that have been redacted or removed that contain comments on the merits of the rulemaking will be retained in the public comment file and will be considered as required under the Administrative Procedure Act and other applicable laws, and may be accessible under the FOIA. FOR FURTHER INFORMATION CONTACT: Eileen A. Donovan, Deputy Director, 202–418–5096, edonovan@cftc.gov; Division of Clearing and Risk, Commodity Futures Trading Commission, Three Lafayette Centre, 1155 21st Street NW, Washington, DC 20581; Theodore Z. Polley III, Associate Director, (312) 596–0551, tpolley@ cftc.gov; or Joe Opron, Special Counsel, (312) 596–0653, jopron@cftc.gov; Division of Clearing and Risk, 1 17 CFR 145.9. Commission regulations referred to in this release are found at 17 CFR chapter I (2020), and are accessible on the Commission’s website at https://www.cftc.gov/LawRegulation/ CommodityExchangeAct/index.htm. PO 00000 Frm 00023 Fmt 4702 Sfmt 4702 49559 Commodity Futures Trading Commission, 77 West Jackson Boulevard, Suite 800, Chicago, Illinois 60604. SUPPLEMENTARY INFORMATION: Table of Contents I. Background II. Proposed Amendments to § 39.24(b) III. Proposed Amendments to § 39.24(c) IV. Request for Comments V. Related Matters A. Regulatory Flexibility Act B. Paperwork Reduction Act C. Cost-Benefit Considerations D. Antitrust Considerations I. Background The Market Risk Advisory Committee (MRAC) is a discretionary advisory committee established by the authority of the Commission in accordance with the Federal Advisory Committee Act, as amended.2 The MRAC advises the Commission on matters related to evolving market structures and movement of risk across clearinghouses, exchanges, intermediaries, market makers and end-users.3 MRAC subcommittees are organized by topic to produce reports and recommendations to the full MRAC that, if approved, are submitted to the Commission for its consideration. On February 23, 2021, the MRAC approved a report from its Central Counterparty (CCP) Risk and Governance Subcommittee (Subcommittee) that provided several recommendations on DCO risk governance.4 For each topic considered in the report, the (1) DCOs and (2) clearing members and end-users (CM/ EU) represented on the Subcommittee each provided separate recommendations, and in some instances proposed rule text. On some topics, the two groups reached a general agreement on how DCO governance might be improved, but there were also areas of disagreement. The Commission is proposing several amendments to § 39.24 that are consistent with the Subcommittee’s recommendations to enhance the Commission’s DCO governance standards. First, the Commission proposes to require each DCO to establish and consult with one or more RMCs comprised of clearing members 25 U.S.C. App. 2. Market Risk Advisory Committee, available at https://www.cftc.gov/About/Advisory Committees/MRAC. 4 MRAC CCP Risk and Governance Subcommittee, Recommendations on CCP Governance and Summary of Subcommittee Constituent Perspectives, available at https:// www.cftc.gov/media/6201/MRAC_CCPRGS_ RCCOG022321/download (Feb. 23, 2021). 3 See E:\FR\FM\11AUP1.SGM 11AUP1

Agencies

[Federal Register Volume 87, Number 154 (Thursday, August 11, 2022)]
[Proposed Rules]
[Pages 49556-49559]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-16680]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0991; Project Identifier AD-2022-00155-T]
RIN 2120-AA64


Airworthiness Directives; Learjet, Inc., Airplanes

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 Learjet, Inc., Model 45 airplanes. This proposed AD was 
prompted by a determination that new or more restrictive airworthiness 
limitations are necessary. This proposed AD would require revising the 
existing inspection program to incorporate reduced inspection intervals 
for the anti-ice manifold assembly. 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 September 
26, 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 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 Learjet, 
Inc., One Learjet Way, Wichita, KS 67209-2942; telephone 316-946-2000; 
fax 316-946-2220; email [email protected]; internet 
www.bombardier.com. You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 2200 South 
216th St., Des Moines, WA. For information on the availability of this 
material at the FAA, call 206-231-3195.

Examining the AD Docket

    You may examine the AD docket at www.regulations.gov by searching 
for and locating Docket No. FAA-2022-0991; 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 NPRM, any comments 
received, and other information. The street address for Docket 
Operations is listed above.

FOR FURTHER INFORMATION CONTACT: Adam Hein, Aerospace Engineer, 
Mechanical Systems and Propulsion Section, FAA, Wichita ACO Branch, 
1801 S Airport Road, Wichita, KS 67209; telephone (316) 946-4116; 
email: [email protected].

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-2022-0991; Project Identifier 
AD-2022-00155-T'' 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 
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

[[Page 49557]]

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 Adam Hein, Aerospace 
Engineer, Mechanical Systems and Propulsion Section, FAA, Wichita ACO 
Branch, 1801 S Airport Road, Wichita, KS 67209; telephone (316) 946-
4116; email: [email protected]. 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 2001-03-05, Amendment 39-12109 (66 FR 10353, 
February 15, 2001) (AD 2001-03-05), for certain Learjet Model 45 
airplanes. AD 2001-03-05 requires, among other actions, revising the 
existing Learjet 45 maintenance program to incorporate additional 
inspections and maintenance practices for the anti-ice manifold 
assembly. AD 2001-03-05 resulted from anti-ice system difficulties on a 
Learjet Model 45 airplane, generating a warning to the flightcrew of an 
overheat condition of the horizontal stabilizer. The FAA issued AD 
2001-03-05 to address metal fragments breaking off the anti-ice 
manifold assembly due to fatigue, which could block a duct in the anti-
ice system and result in an unannunciated loss of ice protection.
    AD 2001-03-05 mandates a 600-hour repetitive inspection interval of 
an earlier design/part number of the anti-ice manifold as specified in 
the Learjet 45 maintenance program revision. The part was subsequently 
redesigned outside the scope of AD 2001-03-05, and the inspection 
interval for airplanes with the redesigned part was extended to 1,200 
flight hours by Learjet.
    Since the FAA issued AD 2001-03-05, the design approval holder 
determined that the design improvements made to the anti-ice manifold 
assembly did not fully address the original issue of vane cracking, so 
the 1,200-hour inspection on the redesigned part is insufficient. 
However, the FAA determined that a repetitive inspection interval of 
600 flight hours is sufficient to address the unsafe condition. 
Therefore, this proposed AD would require revising the existing 
inspection program to incorporate a reduced 600-hour inspection 
interval for the redesigned part. Accomplishing the proposed actions 
would terminate the requirements of paragraph (c) of AD 2001-03-05.
    The FAA is proposing this AD to address metal fragments breaking 
off the anti-ice manifold assembly due to fatigue, which could block a 
duct in the anti-ice system and result in an unannunciated loss of ice 
protection and subsequent loss of control of the airplane.

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 Learjet 40 Maintenance Manual Temporary Revision 
(TR) 04-33 and Learjet 45 Maintenance Manual TR 04-48, both dated 
January 18, 2022. This service information specifies reduced inspection 
intervals for the anti-ice manifold assembly.
    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 revising the existing inspection 
program to incorporate reduced inspection intervals for the anti-ice 
manifold assembly.
    This proposed AD would require revisions to certain operator 
maintenance documents to include new actions (e.g., inspections). 
Compliance with these actions is required by 14 CFR 91.403(c). For 
airplanes that have been previously modified, altered, or repaired in 
the areas addressed by this proposed AD, the operator may not be able 
to accomplish the actions described in the revisions. In this 
situation, to comply with 14 CFR 91.403(c), the operator must request 
approval for an alternative method of compliance according to paragraph 
(k) of this proposed AD.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 443 airplanes of U.S. registry. The FAA estimates the following 
costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Inspection program revision...........  1 work-hour x $85 per                 $0             $85         $37,655
                                         hour = $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

[[Page 49558]]

    (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

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:

Learjet, Inc.: Docket No. FAA-2022-0991; Project Identifier AD-2022-
00155-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by September 26, 2022.

(b) Affected ADs

    This AD affects AD 2001-03-05, Amendment 39-12109 (66 FR 10353, 
February 15, 2001) (AD 2001-03-05).

(c) Applicability

    This AD applies to all Learjet, Inc., Model 45 (Learjet 40), 
Model 45 (Learjet 45), Model 45 (Learjet 70), and Model 45 (Learjet 
75) airplanes, serial numbers 45-002 through 45-556 inclusive, and 
45-2001 through 45-2146 inclusive, certificated in any category.

(d) Subject

    Air Transport Association (ATA) of America Code 36, Pneumatic.

(e) Unsafe Condition

    This AD was prompted by a determination that new or more 
restrictive airworthiness limitations are necessary. The FAA is 
issuing this AD to address metal fragments breaking off the anti-ice 
manifold assembly due to fatigue, which could block a duct in the 
anti-ice system and result in an unannunciated loss of ice 
protection and subsequent loss of control of the airplane.

(f) Compliance

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

(g) Maintenance or Inspection Program Revision

    (1) For Learjet 40 and 45 variants: Within 60 days after the 
effective date of this AD, revise the existing inspection program by 
incorporating the information in Learjet 40 Maintenance Manual 
Temporary Revision (TR) 04-33 or Learjet 45 Maintenance Manual TR 
04-48, both dated January 18, 2022, as applicable. The initial 
compliance time for the inspection is at the applicable time 
specified in paragraph (g)(1)(i) or (ii) of this AD.
    (i) For airplanes with more than 600 flight hours since the most 
recent inspection of the anti-ice manifold assembly was performed as 
of the effective date of this AD: Do the inspection within 100 
flight hours or 60 days after the effective date of this AD, 
whichever occurs first.
    (ii) For airplanes with 600 flight hours or less since the most 
recent inspection of the anti-ice manifold assembly was performed as 
of the effective date of this AD: Do the inspection within 600 
flight hours after the most recent inspection or within 100 flight 
hours after the effective date of this AD, whichever occurs later.
    (2) For Learjet 70 and 75 variants: Within 60 days after the 
effective date of this AD, revise the existing inspection program to 
incorporate the information identified in figure 1 to paragraph 
(g)(2) of this AD. The initial compliance time for the inspection is 
at the applicable time specified in paragraph (g)(2)(i) or (ii) of 
this AD.
[GRAPHIC] [TIFF OMITTED] TP11AU22.012

    (i) For airplanes with more than 600 flight hours since the most 
recent inspection of the anti-ice manifold assembly was performed as 
of the effective date of this AD: Do the inspection within 100 
flight hours or 60 days after the effective date of this AD, 
whichever occurs first.
    (ii) For airplanes with 600 flight hours or less since the most 
recent inspection of the anti-ice manifold assembly was performed as 
of the effective date of this AD: Do the inspection within 600 
flight hours after the most recent inspection or within 100 flight 
hours after the effective date of this AD, whichever occurs later.

(h) No Alternative Actions or Intervals

    After the existing inspection program has been revised as 
required by paragraph (g) of this AD, no alternative actions (e.g., 
inspections) or intervals, may be used unless the actions and 
intervals are approved as an alternative method of compliance (AMOC) 
in accordance with the procedures specified in paragraph (k) of this 
AD.

(i) Terminating Action for Paragraph (c) of AD 2001-03-05

    Accomplishing the revision of the existing inspection program 
required by paragraph (g) of this AD terminates the requirements of 
paragraph (c) of AD 2001-03-05.

(j) Special Flight Permit

    Special flight permits may be issued in accordance with 14 CFR 
21.197 and 21.199 to operate the airplane to a location where the 
airplane can be inspected, provided the airplane is restricted from 
flying into known icing conditions.

(k) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Wichita ACO 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 responsible Flight Standards Office, 
as appropriate. If sending information directly to the manager of 
the certification office, send it to the attention of the person 
identified in paragraph (l)(1) of this AD.
    (2) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the responsible Flight Standards Office.

(l) Related Information

    (1) For more information about this AD, contact Adam Hein, 
Aerospace Engineer,

[[Page 49559]]

Mechanical Systems and Propulsion Section, FAA, Wichita ACO Branch, 
1801 S Airport Road, Wichita, KS 67209; telephone (316) 946-4116; 
email: [email protected].
    (2) For service information identified in this AD, contact 
Learjet, Inc., One Learjet Way, Wichita, KS 67209-2942; telephone 
316-946-2000; fax 316-946-2220; email [email protected]; 
internet www.bombardier.com. You may view this referenced service 
information at the FAA, Airworthiness Products Section, Operational 
Safety Branch, 2200 South 216th St., Des Moines, WA. For information 
on the availability of this material at the FAA, call 206-231-3195.

    Issued on July 29, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2022-16680 Filed 8-10-22; 8:45 am]
BILLING CODE 4910-13-P
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