Airworthiness Directives; Learjet Inc. Airplanes, 24349-24351 [2012-9557]

Download as PDF Federal Register / Vol. 77, No. 79 / Tuesday, April 24, 2012 / Rules and Regulations (a) Effective Date This airworthiness directive (AD) becomes effective May 29, 2012. (b) Affected ADs None. (c) Applicability This AD applies to Bombardier, Inc. Model CL–600–2B16 (CL–604 Variant) airplanes, certificated in any category, serial numbers 5408 through 5665 inclusive, and 5701 through 5856 inclusive. (d) Subject Air Transport Association (ATA) of America Code 24: Electrical Power. (e) Reason This AD was prompted by reports of the air driven generator (ADG) failing to power essential buses during functional tests, due to the low threshold setting of the circuit protection on the ADG’s generator control unit (GCU) preventing the ADG from supplying power to the essential buses. We are issuing this AD to prevent loss of power from the ADG to the essential buses which, in the event of an emergency, could prevent continued safe flight. (f) Compliance You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. mstockstill on DSK4VPTVN1PROD with RULES (g) Actions Within 36 months after the effective date of this AD, remove the ADG GCU, Bombardier part number (P/N) 604–90800–7 (Hamilton Sundstrand P/N 761341A), and install a new or serviceable ADG GCU Bombardier P/N 604–90800–27 (Hamilton Sundstrand P/N 761341B), in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 605–24–003, dated April 25, 2011 (for airplane serial numbers 5701 through 5856); or Bombardier Service Bulletin 604–24–023, dated April 25, 2011 (for airplane serial numbers 5408 through 5665). Note 1 to paragraph (g) of this AD: Bombardier Service Bulletins 605–24–003 and 604–24–023, both dated April 25, 2011, refer to Hamilton Sundstrand Service Bulletin ERPS10G–24–1, dated February 9, 2011, as an additional source of guidance for modifying and testing the ADG GCU with new printed wiring assemblies, and reidentifying the GCU using a new part number. (h) Parts Installation As of the effective date of this AD, no person may install an ADG GCU, Bombardier P/N 604–90800–7 (Hamilton Sundstrand P/N 761341A), on any airplane. (i) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Certification Office (ACO), ANE–170, FAA, has the authority to approve AMOCs for this VerDate Mar<15>2010 16:38 Apr 23, 2012 Jkt 226001 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 ACO, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO, 1600 Stewart Avenue, Suite 10, Westbury, New York 11590; telephone 516–228–7300; fax 516– 794–5531. 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. The AMOC approval letter must specifically reference this AD. (2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). You are required to assure the product is airworthy before it is returned to service. (j) Related Information Refer to MCAI Canadian Airworthiness Directive CF–2011–25, dated July 25, 2011; Bombardier Service Bulletin 605–24–003, dated April 25, 2011; and Bombardier Service Bulletin 604–24–023, dated April 25, 2011; for related information. (k) Material Incorporated by Reference (1) You must use the following service information to do the actions required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference (IBR) of the following service information under 5 U.S.C. 552(a) and 1 CFR part 51: (i) Bombardier Service Bulletin 605–24– 003, dated April 25, 2011. (ii) Bombardier Service Bulletin 604–24– 023, dated April 25, 2011. (2) For service information identified in ˆ this AD, contact Bombardier, Inc., 400 Cote´ Vertu Road West, Dorval, Quebec H4S 1Y9, Canada; telephone 514–855–5000; fax 514– 855–7401; email thd.crj@aero.bombardier.com; Internet http:// www.bombardier.com. (3) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. (4) You may also review copies of the service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at an NARA facility, call 202–741– 6030, or go to http://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. Issued in Renton, Washington, on April 10, 2012. John P. Piccola, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2012–9395 Filed 4–23–12; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00009 Fmt 4700 Sfmt 4700 24349 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2011–1258; Directorate Identifier 2011–NM–184–AD; Amendment 39–17033; AD 2012–08–16] RIN 2120–AA64 Airworthiness Directives; Learjet Inc. Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for certain Learjet Inc. Model 60 airplanes. This AD was prompted by two incidents of swapped fire extinguishing wires. This AD requires inspecting the electrical leads routed to the fire extinguishing containers for proper identification and missing labels, and to ensure the electrical leads are connected to the correct squibs; and corrective actions if necessary. We are issuing this AD to prevent the extinguishing agent of the fire extinguishing container from being delivered to the wrong engine in the event of an engine fire, and a consequent uncontrolled fire. DATES: This AD is effective May 29, 2012. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in the AD as of May 29, 2012. ADDRESSES: For service information identified in this AD, contact Learjet, Inc., One Learjet Way, Wichita, Kansas 67209–2942; telephone 316–946–2000; fax 316–946–2220; email ac.ict@aero.bombardier.com; Internet http://www.bombardier.com. You may review copies of the referenced service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. SUMMARY: Examining the AD Docket You may examine the AD docket on the Internet at http:// www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and other information. The address for the Docket Office (phone: 800–647–5527) is Document Management Facility, U.S. Department of Transportation, Docket Operations, M–30, West Building E:\FR\FM\24APR1.SGM 24APR1 24350 Federal Register / Vol. 77, No. 79 / Tuesday, April 24, 2012 / Rules and Regulations Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: James Galstad, Aerospace Engineer, Mechanical Systems and Propulsion Branch, ACE–116W, FAA, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; phone: 316–946–4135; fax: 316–946–4107; email: james.galstad@faa.gov. SUPPLEMENTARY INFORMATION: Discussion We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM published in the Federal Register on November 30, 2011 (76 FR 74010). That NPRM proposed to require inspecting the electrical leads routed to the fire extinguishing containers for proper identification and missing labels, and to ensure the electrical leads are connected to the correct squibs; and corrective actions if necessary. Comments We gave the public the opportunity to participate in developing this AD. The following presents the comment received on the proposal (76 FR 74010, November 30, 2011) and the FAA’s response. clarification purposes, we have revised paragraph (g) of this AD to add paragraphs (g)(1) and (g)(2), which more clearly specify the compliance times for airplanes with and without an APU. Request To Revise Compliance Time The single commenter, SpiritJets, LLC, stated that the wording of the compliance time in paragraph (g) of the NPRM (76 FR 74010, November 30, 2011) appears to be inaccurate because many of those airplanes do not have auxiliary power units (APU) installed. The compliance time in the NPRM is worded as follows: ‘‘Within 300 flight hours after the effective date of this AD, or at the next auxiliary power unit (APU) removal, whichever occurs first * * *’’ We infer that the commenter requests we remove the reference to the next APU removal from the compliance time. We find that clarification is necessary. Paragraph (g) of this AD applies to all airplanes identified in the applicability (i.e., paragraph (c) of this AD). Therefore, if an APU is not installed on an airplane that is identified in paragraph (c) of this AD, ‘‘within 300 flight hours after the effective date of this AD’’ is the appropriate compliance time for accomplishing the requirements of the AD on that airplane. For Conclusion We reviewed the relevant data, considered the comment received, and determined that air safety and the public interest require adopting the AD with the change described previously and minor editorial changes. We have determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM (76 FR 74010, November 30, 2011) for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM (76 FR 74010, November 30, 2011). We also determined that this change will not increase the economic burden on any operator or increase the scope of the AD. Costs of Compliance We estimate that this AD affects 232 airplanes of U.S. registry. We estimate the following costs to comply with this AD: ESTIMATED COSTS Action Labor cost Parts cost Cost per product Cost on U.S. operators Inspection .................................................. 3 work-hours × $85 per hour = $255 ....... 0 $255 $59,160 We estimate the following costs to do any necessary modification that would be required based on the results of the inspection. We have no way of determining the number of aircraft that might need this modification: ON-CONDITION COSTS Action Labor cost Parts cost Cost per product Corrective actions ..................................................... 1 work-hour × $85 per hour = $85 ........................... $8 $93 According to the manufacturer, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. We do not control warranty coverage for affected individuals. As a result, we have included all costs in our cost estimate. mstockstill on DSK4VPTVN1PROD with RULES 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 VerDate Mar<15>2010 16:38 Apr 23, 2012 Jkt 226001 detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701: ‘‘General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. PO 00000 Frm 00010 Fmt 4700 Sfmt 4700 Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will 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 this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Is not a ‘‘significant rule’’ under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979), E:\FR\FM\24APR1.SGM 24APR1 Federal Register / Vol. 77, No. 79 / Tuesday, April 24, 2012 / Rules and Regulations (3) Will not affect intrastate aviation in Alaska, and (4) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ 2012–08–16 Learjet Inc.: Amendment 39– 17033; Docket No. FAA–2011–1258; Directorate Identifier 2011–NM–184–AD. (a) Effective Date This AD is effective May 29, 2012. (b) Affected ADs None. (c) Applicability This AD applies to Learjet Inc. Model 60 airplanes, certificated in any category, serial numbers 60–002 through 60–366 inclusive. (d) Subject Joint Aircraft System Component (JASC)/ Air Transport Association (ATA) of America Code 2620, Extinguishing system. (e) Unsafe Condition This AD was prompted by two incidents of swapped fire extinguishing wires, which could cause the extinguishing agent of the fire extinguishing container to be delivered to the wrong engine in the event of an engine fire, and a consequent uncontrolled fire. We are issuing this AD to correct the unsafe condition on these products. mstockstill on DSK4VPTVN1PROD with RULES (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Inspection and Corrective Actions At the applicable time specified in paragraph (g)(1) or (g)(2) of this AD: Inspect the electrical leads routed to the fire extinguishing containers for proper identification and missing labels, and to ensure the electrical leads are connected to the correct squibs, as specified in Bombardier Service Bulletin 60–26–4, dated May 2, 2011. VerDate Mar<15>2010 16:38 Apr 23, 2012 Jkt 226001 Do the inspection in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 60–26–4, dated May 2, 2011. If any misidentification is found, or if any label is missing, or if the electrical leads are not connected to the correct squibs, as specified in Bombardier Service Bulletin 60– 26–4, dated May 2, 2011: Before further flight, do all applicable corrective actions, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 60–26–4, dated May 2, 2011. (1) For airplanes equipped with an APU: Within 300 flight hours after the effective date of this AD, or at the next auxiliary power unit (APU) removal, whichever occurs first. (2) For airplanes not equipped with an APU: Within 300 flight hours after the effective date of this AD. (h) Alternative Methods of Compliance (AMOCs) (1) The Manager, Wichita Aircraft Certification Office (ACO), 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 ACO, send it to the attention of the person identified in the Related Information section of this AD. (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. (i) Related Information For more information about this AD, contact James Galstad, Aerospace Engineer, Mechanical Systems and Propulsion Branch, ACE–116W, Wichita Aircraft Certification Office, FAA, 1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas 67209; phone: 316–946–4135; fax: 316–946– 4107; email: james.galstad@faa.gov. (j) Material Incorporated by Reference (1) You must use the following service information to do the actions required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference (IBR) under 5 U.S.C. 552(a) and 1 CFR part 51 of the following service information: (i) Bombardier Service Bulletin 60–26–4, dated May 2, 2011. (2) For service information identified in this AD, contact Learjet, Inc., One Learjet Way, Wichita, Kansas 67209–2942; telephone 316–946–2000; fax 316–946–2220; email ac.ict@aero.bombardier.com; Internet http://www.bombardier.com. (3) You may review copies of the service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. (4) You may also review copies of the service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this PO 00000 Frm 00011 Fmt 4700 Sfmt 4700 24351 material at NARA, call 202–741–6030, or go to: http://www.archives.gov/federal-register/ cfr/ibr-locations.html. Issued in Renton, Washington, on April 13, 2012. John P. Piccola, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2012–9557 Filed 4–23–12; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2012–0036; Directorate Identifier 2011–NM–142–AD; Amendment 39–17028; AD 2012–08–11] RIN 2120–AA64 Airworthiness Directives; Bombardier, Inc. Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC–8–400 series airplanes. This AD was prompted by test reports that showed that failure of a retract port flexible hose of a main landing gear (MLG) retraction actuator could cause excessive hydraulic fluid leakage. This AD requires a detailed inspection for defects and damage of the retract port flexible hose on the left and right MLG retraction actuator and replacement of the flexible hose if needed. We are issuing this AD to detect and correct defects and damage of the retract port flexible hose which could lead to an undamped extension of the MLG and could result in MLG structural failure, leading to an unsafe asymmetric landing configuration. DATES: This AD becomes effective May 29, 2012. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of May 29, 2012. ADDRESSES: You may examine the AD docket on the Internet at http:// www.regulations.gov or in person at the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590. FOR FURTHER INFORMATION CONTACT: Cesar Gomez, Aerospace Engineer, Airframe and Mechanical Systems Branch, ANE–171, FAA, New York SUMMARY: E:\FR\FM\24APR1.SGM 24APR1

Agencies

[Federal Register Volume 77, Number 79 (Tuesday, April 24, 2012)]
[Rules and Regulations]
[Pages 24349-24351]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2012-9557]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-1258; Directorate Identifier 2011-NM-184-AD; 
Amendment 39-17033; AD 2012-08-16]
RIN 2120-AA64


Airworthiness Directives; Learjet Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
Learjet Inc. Model 60 airplanes. This AD was prompted by two incidents 
of swapped fire extinguishing wires. This AD requires inspecting the 
electrical leads routed to the fire extinguishing containers for proper 
identification and missing labels, and to ensure the electrical leads 
are connected to the correct squibs; and corrective actions if 
necessary. We are issuing this AD to prevent the extinguishing agent of 
the fire extinguishing container from being delivered to the wrong 
engine in the event of an engine fire, and a consequent uncontrolled 
fire.

DATES: This AD is effective May 29, 2012.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in the AD as of May 29, 2012.

ADDRESSES: For service information identified in this AD, contact 
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942; telephone 
316-946-2000; fax 316-946-2220; email ac.ict@aero.bombardier.com; 
Internet http://www.bombardier.com. You may review copies of the 
referenced service information at the FAA, Transport Airplane 
Directorate, 1601 Lind Avenue SW., Renton, Washington. For information 
on the availability of this material at the FAA, call 425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this AD, the regulatory evaluation, 
any comments received, and other information. The address for the 
Docket Office (phone: 800-647-5527) is Document Management Facility, 
U.S. Department of Transportation, Docket Operations, M-30, West 
Building

[[Page 24350]]

Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 
20590.

FOR FURTHER INFORMATION CONTACT: James Galstad, Aerospace Engineer, 
Mechanical Systems and Propulsion Branch, ACE-116W, FAA, Wichita 
Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-
Continent Airport, Wichita, Kansas 67209; phone: 316-946-4135; fax: 
316-946-4107; email: james.galstad@faa.gov.

SUPPLEMENTARY INFORMATION: 

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an AD that would apply to the specified products. 
That NPRM published in the Federal Register on November 30, 2011 (76 FR 
74010). That NPRM proposed to require inspecting the electrical leads 
routed to the fire extinguishing containers for proper identification 
and missing labels, and to ensure the electrical leads are connected to 
the correct squibs; and corrective actions if necessary.

Comments

    We gave the public the opportunity to participate in developing 
this AD. The following presents the comment received on the proposal 
(76 FR 74010, November 30, 2011) and the FAA's response.

Request To Revise Compliance Time

    The single commenter, SpiritJets, LLC, stated that the wording of 
the compliance time in paragraph (g) of the NPRM (76 FR 74010, November 
30, 2011) appears to be inaccurate because many of those airplanes do 
not have auxiliary power units (APU) installed. The compliance time in 
the NPRM is worded as follows: ``Within 300 flight hours after the 
effective date of this AD, or at the next auxiliary power unit (APU) 
removal, whichever occurs first * * *''
    We infer that the commenter requests we remove the reference to the 
next APU removal from the compliance time. We find that clarification 
is necessary. Paragraph (g) of this AD applies to all airplanes 
identified in the applicability (i.e., paragraph (c) of this AD). 
Therefore, if an APU is not installed on an airplane that is identified 
in paragraph (c) of this AD, ``within 300 flight hours after the 
effective date of this AD'' is the appropriate compliance time for 
accomplishing the requirements of the AD on that airplane. For 
clarification purposes, we have revised paragraph (g) of this AD to add 
paragraphs (g)(1) and (g)(2), which more clearly specify the compliance 
times for airplanes with and without an APU.

Conclusion

    We reviewed the relevant data, considered the comment received, and 
determined that air safety and the public interest require adopting the 
AD with the change described previously and minor editorial changes. We 
have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM (76 FR 74010, November 30, 2011) for correcting the unsafe 
condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM (76 FR 74010, November 30, 2011).
    We also determined that this change will not increase the economic 
burden on any operator or increase the scope of the AD.

Costs of Compliance

    We estimate that this AD affects 232 airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                  Cost on U.S.
              Action                    Labor cost           Parts cost      Cost per product      operators
----------------------------------------------------------------------------------------------------------------
Inspection.......................  3 work-hours x $85                   0               $255            $59,160
                                    per hour = $255.
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary modification 
that would be required based on the results of the inspection. We have 
no way of determining the number of aircraft that might need this 
modification:

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                   Action                              Labor cost               Parts cost      Cost per product
----------------------------------------------------------------------------------------------------------------
Corrective actions.........................  1 work-hour x $85 per hour =                 $8                $93
                                              $85.
----------------------------------------------------------------------------------------------------------------

    According to the manufacturer, some of the costs of this AD may be 
covered under warranty, thereby reducing the cost impact on affected 
individuals. We do not control warranty coverage for affected 
individuals. As a result, we have included all costs in our cost 
estimate.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. Subtitle VII: Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701: ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will 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 this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),

[[Page 24351]]

    (3) Will not affect intrastate aviation in Alaska, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13  [Amended]

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

2012-08-16 Learjet Inc.: Amendment 39-17033; Docket No. FAA-2011-
1258; Directorate Identifier 2011-NM-184-AD.

(a) Effective Date

    This AD is effective May 29, 2012.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Learjet Inc. Model 60 airplanes, certificated 
in any category, serial numbers 60-002 through 60-366 inclusive.

(d) Subject

    Joint Aircraft System Component (JASC)/Air Transport Association 
(ATA) of America Code 2620, Extinguishing system.

(e) Unsafe Condition

    This AD was prompted by two incidents of swapped fire 
extinguishing wires, which could cause the extinguishing agent of 
the fire extinguishing container to be delivered to the wrong engine 
in the event of an engine fire, and a consequent uncontrolled fire. 
We are issuing this AD to correct the unsafe condition on these 
products.

(f) Compliance

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

(g) Inspection and Corrective Actions

    At the applicable time specified in paragraph (g)(1) or (g)(2) 
of this AD: Inspect the electrical leads routed to the fire 
extinguishing containers for proper identification and missing 
labels, and to ensure the electrical leads are connected to the 
correct squibs, as specified in Bombardier Service Bulletin 60-26-4, 
dated May 2, 2011. Do the inspection in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 60-26-4, 
dated May 2, 2011. If any misidentification is found, or if any 
label is missing, or if the electrical leads are not connected to 
the correct squibs, as specified in Bombardier Service Bulletin 60-
26-4, dated May 2, 2011: Before further flight, do all applicable 
corrective actions, in accordance with the Accomplishment 
Instructions of Bombardier Service Bulletin 60-26-4, dated May 2, 
2011.
    (1) For airplanes equipped with an APU: Within 300 flight hours 
after the effective date of this AD, or at the next auxiliary power 
unit (APU) removal, whichever occurs first.
    (2) For airplanes not equipped with an APU: Within 300 flight 
hours after the effective date of this AD.

(h) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Wichita Aircraft Certification Office (ACO), 
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 ACO, send it to the 
attention of the person identified in the Related Information 
section of this AD.
    (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.

(i) Related Information

    For more information about this AD, contact James Galstad, 
Aerospace Engineer, Mechanical Systems and Propulsion Branch, ACE-
116W, Wichita Aircraft Certification Office, FAA, 1801 Airport Road, 
Room 100, Mid-Continent Airport, Wichita, Kansas 67209; phone: 316-
946-4135; fax: 316-946-4107; email: james.galstad@faa.gov.

(j) Material Incorporated by Reference

    (1) You must use the following service information to do the 
actions required by this AD, unless the AD specifies otherwise. The 
Director of the Federal Register approved the incorporation by 
reference (IBR) under 5 U.S.C. 552(a) and 1 CFR part 51 of the 
following service information:
    (i) Bombardier Service Bulletin 60-26-4, dated May 2, 2011.
    (2) For service information identified in this AD, contact 
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942; 
telephone 316-946-2000; fax 316-946-2220; email 
ac.ict@aero.bombardier.com; Internet http://www.bombardier.com.
    (3) You may review copies of the service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, 
Washington. For information on the availability of this material at 
the FAA, call 425-227-1221.
    (4) You may also review copies of the 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, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Renton, Washington, on April 13, 2012.
John P. Piccola,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2012-9557 Filed 4-23-12; 8:45 am]
BILLING CODE 4910-13-P