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2022-14-08 BAE SYSTEMS (OPERATIONS) LIMITED: Amendment 39-22113; Docket No. FAA-2022-0461; Project Identifier MCAI-2021-01156-T.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective August 18, 2022.

(b) AFFECTED ADS

    This AD replaces AD 2008-16-06,Amendment 39-15624 (73 FR 45346, August
    5, 2008) (AD 2008-16-06).

(c) APPLICABILITY

    This AD  applies  to  BAE Systems (Operations) Limited Model 4101 air-
    planes, certificated in any category, all serial numbers.

(d) SUBJECT

    Air Transport Association (ATA) of America Code 28, Fuel.

(e) REASON

    This AD was prompted by a report that there is insufficient bonding of
    the crossfeed valve in the fuel tank area. The FAA is issuing this  AD
    to address insufficient  or defective bonding  in the fuel  tank area,
    which, if  not corrected,  could lead  to ignition  of fuel vapors and
    subsequent fuel tank explosion.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) RETAINED ACTIONS, WITH REVISED SERVICE INFORMATION

    This paragraph restates the requirements of paragraph (f)  of AD 2008-
    16-06,  with revised service information.  Within 24 months after Sep-
    tember 9, 2008 (the effective date of AD 2008-16-06),  unless  already
    done,  do the actions  specified  in  paragraphs (g)(1) through (3) of
    this AD.

(1) Inspect the bonding leads between ribs 1 and 9 and between ribs 16 and
    19, in the left-hand (LH) and right-hand (RH) wings in accordance with
    paragraph 2.B.(2)  of the  Accomplishment Instructions  of BAE Systems
    (Operations) Limited  Service Bulletin  J41-28-013, Revision  1, dated
    January 10, 2008; or BAE Systems (Operations) Limited Service Bulletin
    J41-28-013, Revision 2, dated July  8, 2019; and, before next  flight,
    replace all defective bonding leads with airworthy parts in accordance
    with  BAE Systems  (Operations) Limited  Service Bulletin  J41-28-013,
    Revision  1,  dated  January 10,  2008;  or  BAE Systems  (Operations)
    Limited Service Bulletin J41-28-013,  Revision 2,  dated July 8, 2019.
    As of the effective date of this AD, BAE Systems (Operations)  Limited
    Service Bulletin J41-28-013, Revision 2,  dated July 8, 2019, must  be
    used for the actions required by this paragraph.

(2) Inspect all fuel system pipe runs inside the LH and RH wings in accord
    -ance with paragraph 2.B.(3) of the Accomplishment Instructions of BAE
    Systems (Operations) Limited Service Bulletin J41-28-013,  Revision 1,
    dated January 10,  2008; or BAE  Systems (Operations) Limited  Service
    Bulletin J41-28-013, Revision 2, dated July 8, 2019; and, if incorrect
    clearances  are  found,  before  next  flight,  adjust  clearances  in
    accordance with BAE Systems (Operations) Limited Service Bulletin  J41
    -28-013,  Revision  1,  dated   January  10,  2008;  or   BAE  Systems
    (Operations) Limited  Service Bulletin  J41-28-013, Revision  2, dated
    July  8,  2019. As  of  the effective  date  of this  AD,  BAE Systems
    (Operations) Limited  Service Bulletin  J41-28-013, Revision  2, dated
    July 8, 2019, must be used for the actions required by this paragraph.

(3) Install additional electrical bonding of components  within the LH and
    RH wings in accordance with paragraphs 2.B.(4) through 2.B.(15) of the
    Accomplishment Instructions  of BAE Systems (Operations) Limited Serv-
    ice Bulletin J41-28-013,  Revision 1, dated January 10, 2008; or para-
    graphs 2.B.(4) and 2.B.(6) through 2.B.(16)  inclusive  of BAE Systems
    (Operations) Limited  Service Bulletin J41-28-013,  Revision 2,  dated
    July 8, 2019. As of the effective date of this AD, BAE Systems (Opera-
    tions) Limited Service Bulletin J41-28-013,  Revision 2, dated July 8,
    2019, must be used for the actions required by this paragraph.

(h) NEW REQUIREMENT OF THIS AD:  REPLACE BOLTS AND WASHERS SECURING CROSS-
    FEED VALVE

    Within 24 months  after the effective date of this AD,  install  addi-
    tional bonding leads on components  within the dry bay at Rib 1 on the
    airplane centerline  and below  the  fuselage  (around  the  crossfeed
    valve) and perform a resistance check  in  accordance  with  paragraph
    2.B.(5)  of BAE Systems (Operations) Limited  Service Bulletin J41-28-
    013, Revision 2, dated July 8, 2019.

(i) OTHER FAA AD PROVISIONS

(1) Alternative Methods of Compliance (AMOCs): The Manager, Large Aircraft
    Section, 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  responsible Flight  Standards Office, as
    appropriate. If  sending information  directly to  the Large  Aircraft
    Section, International Validation Branch, send it to the attention  of
    the person identified in paragraph (j)(2) of this AD. Information  may
    be emailed to:  9-AVS-AIR-730-AMOC@faa.gov.  Before using any approved
    AMOC,  notify  your  appropriate  principal  inspector,  or  lacking a
    principal inspector, the manager  of the responsible Flight  Standards
    Office.

(2) Contacting the Manufacturer:  For any requirement in this AD to obtain
    instructions from a manufacturer,  the  instructions  must  be  accom-
    plished using a method approved by the Manager, Large Aircraft Section
    International Validation Branch, FAA;  or the Civil Aviation Authority
    (CAA);  or  BAE Systems (Operations) Limited's CAA Design Organization
    Approval (DOA).  If approved by the DOA, the approval must include the
    DOA-authorized signature.

(j) RELATED INFORMATION

(1) Refer to Mandatory Continuing Airworthiness Information  (MCAI) CAA AD
    G-2021-0013, dated October 21, 2021,  for  related  information.  This
    MCAI may be found  in the AD docket  at https://www.regulations.gov by
    searching for and locating Docket No. FAA-2022-0461.

(2) For more information about this AD,  contact Todd Thompson,  Aerospace
    Engineer, Large Aircraft Section, International Validation Branch, FAA
    2200 South 216th St., Des Moines, WA 98198; telephone and fax 206-231-
    3228; email todd.thompson@faa.gov.

(3) Service information identified in this AD  that is not incorporated by
    reference is available at the addresses specified in paragraphs (k)(5)
    and (6) of this AD.

(k) 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 this AD specifies otherwise.

(3) The following service information was approved  for IBR  on August 18,
    2022.

(i) BAE Systems (Operations) Limited Service Bulletin J41-28-013, Revision
    2, dated July 8, 2019.

(ii) [Reserved]

(4) The following service information was approved for IBR on September 9,
    2008 (73 FR 45346, August 5, 2008).

(i) BAE Systems (Operations) Limited Service Bulletin J41-28-013, Revision
    1, dated January 10, 2008.

(ii) [Reserved]

(5) For service information identified in  this  AD,  contact  BAE Systems
    (Operations) Limited, Customer Information Department, Prestwick Inter
    -national Airport, Ayrshire, KA9 2RW, Scotland, United Kingdom;  tele-
    phone  +44 1292 675207;  fax  +44 1292 675704;  email  RApublications@
    baesystems.com;internet https://www.baesystems.com/Businesses/Regional
    Aircraft/index.htm.

(6) You may view this service information at the FAA,  Airworthiness Prod-
    ucts 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.

(7) You may view  this service information  that is incorporated by refer-
    ence at the National Archives and Records Administration  (NARA).  For
    information on the availability of this material  at  NARA,  email fr.
    inspection@nara.gov,   or   go  to:  https://www.archives.gov/federal-
    register/cfr/ibr-locations.html.

Issued on June 27, 2022.  Christina Underwood, Acting Director, Compliance
& Airworthiness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT: Todd Thompson,  Aerospace Engineer, Large
Aircraft Section, International Validation Branch,  FAA,  2200 South 216th
St., Des Moines, WA 98198;  telephone  and  fax 206-231-3228;  email todd.
thompson@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0461; Project Identifier MCAI-2021-01156-T;
Amendment 39-22113; AD 2022-14-08]
RIN 2120-AA64

Airworthiness Directives; BAE Systems (Operations) Limited
Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Final rule.

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

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2008-16-
06, which applied to all BAE Systems (Operations) Limited Model 4101
airplanes. AD 2008-16-06 required the installation of additional
bonding leads, inspection of existing bonding leads for defects,
inspection of fuel system pipe runs in the wings to ensure appropriate
clearances are maintained, and corrective actions. This AD continues to
require the actions in AD 2008-16-06, and adds a requirement to install
additional bonding leads around the crossfeed valve and accomplish a
resistance check. This AD was prompted by a report that there is
insufficient bonding of the crossfeed valve in the fuel tank area. The
FAA is issuing this AD to address the unsafe condition on these
products.

DATES: This AD is effective August 18, 2022.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of August 18,
2022.
The Director of the Federal Register approved the incorporation by
reference of a certain other publication listed in this AD as of
September 9, 2008 (73 FR 45346, August 5, 2008).

ADDRESSES: For service information identified in this final rule,
contact BAE Systems (Operations) Limited, Customer Information
Department, Prestwick International Airport, Ayrshire, KA9 2RW,
Scotland, United Kingdom; telephone +44 1292 675207; fax +44 1292
675704; email RApublications@baesystems.com; internet https://www.baesystems.com/Businesses/RegionalAircraft/index.htm. 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. It is also available at https://www.regulations.gov
by searching for and locating Docket No. FAA-2022-0461.

Examining the AD Docket

You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-0461; 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 final rule, the
mandatory continuing airworthiness information (MCAI) any comments
received, and other information. The address for Docket Operations is
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: Todd Thompson, Aerospace Engineer,
Large Aircraft Section, International Validation Branch, FAA, 2200
South 216th St., Des Moines, WA 98198; telephone and fax 206-231-3228;
email todd.thompson@faa.gov.

SUPPLEMENTARY INFORMATION:

Background

The Civil Aviation Authority (CAA), which is the aviation authority
for the United Kingdom, has issued CAA AD G-2021-0013, dated October
21, 2021 (also referred to as the MCAI), to correct an unsafe condition
for all BAE Systems (Operations) Limited Model 4101 airplanes. You may
examine the MCAI in the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-0461.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2008-16-06, Amendment 39-15624 (73 FR
45346, August 5, 2008) (AD 2008-16-06). AD 2008-16-06 applied to all
BAE Systems (Operations) Limited Model 4101 airplanes. The NPRM
published in the Federal Register on April 20, 2022 (87 FR 23474). The
NPRM was prompted by a report that there is insufficient bonding of the
crossfeed valve in the fuel tank area. The NPRM proposed to continue to
require the actions in AD 2008-16-06, and add a requirement to install
additional bonding leads around the crossfeed valve and accomplish a
resistance check. The FAA is issuing this AD to address insufficient or
defective bonding in the fuel tank area, which, if not corrected, could
lead to ignition of fuel vapors and subsequent fuel tank explosion. See
the MCAI for additional background information.

Discussion of Final Airworthiness Directive

Comments

The FAA received no comments on the NPRM or on the determination of
the cost to the public.

Conclusion

The FAA reviewed the relevant data and determined that air safety
requires adopting this AD as proposed. Except for minor editorial
changes, this AD is adopted as proposed in the NPRM. None of the
changes will increase the economic burden on any operator. Accordingly,
the FAA is issuing this AD to address the unsafe condition on these
products.

Related Service Information Under 1 CFR Part 51

BAE Systems (Operations) Limited has issued Service Bulletin J41-
28-013, Revision 2, dated July 8, 2019. This service information
describes procedures for installation of additional bonding leads on
components within the dry bay at Rib 1 on the airplane centerline and
below the fuselage (around the crossfeed valve), a resistance check, an
inspection of existing bonding leads for defects, an inspection for
clearance of all fuel system pipe runs in the wings, and corrective
actions, as necessary. Corrective actions include replacing any
defective bonding leads and adjusting clearances of the fuel system
pipe runs.
This AD also requires BAE Systems (Operations) Limited Service
Bulletin J41-28-013, Revision 1, dated January 10, 2008, which the Director of
the Federal Register approved for incorporation by reference as of
September 9, 2008 (73 FR 45346, August 5, 2008).
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 the ADDRESSES section.

Costs of Compliance

The FAA estimates that this AD affects 12 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:

Estimated Costs for Required Actions

Action
Labor cost
Parts cost
Cost per product
Cost on U.S. operators
Retained actions from AD 2008-16-06 80 work-hours x $85 per hour = $6,800
$1,700
$8,500
$102,000
New actions 2 work-hours x $85 per hour = $170
1,700
1,870
22,440

Estimated Costs of On-Condition Actions

Labor cost
Parts cost
Cost per product
1 work-hour x $85 per hour = $85
$0
$85

Authority for This Rulemaking

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

Regulatory Findings

The FAA determined that this 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) Will not affect intrastate aviation in Alaska, and
(3) 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.

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.

Sec. 39.13 [Amended]

2. The FAA amends Sec. 39.13 by:

a. Removing Airworthiness Directive (AD) 2008-16-06, Amendment 39-15624
(73 FR 45346, August 5, 2008); and

b. Adding the following new AD: