Airworthiness Directives; BAE Systems (Operations) Limited Airplanes
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Issuing agencies
Abstract
The FAA proposes to supersede Airworthiness Directive (AD) 99- 25-11, which applies to certain BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ series airplanes. AD 99-25-11 requires repetitive inspections for cracks along the face of the retraction attachment boss in the nose landing gear (NLG) sidewall; and corrective action, if necessary. Since the FAA issued AD 99-25-11, additional cracking was found that indicated additional airplanes are subject to the unsafe condition. This proposed AD would continue to require the actions in AD 99-25-11, and expand the applicability. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 87 Issue 209 (Monday, October 31, 2022)</title>
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[Federal Register Volume 87, Number 209 (Monday, October 31, 2022)]
[Proposed Rules]
[Pages 65541-65544]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-23201]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-1313; Project Identifier MCAI-2021-01418-T]
RIN 2120-AA64
Airworthiness Directives; BAE Systems (Operations) Limited
Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 99-
25-11, which applies to certain BAE Systems (Operations) Limited Model
BAe 146 and Avro 146-RJ series airplanes. AD 99-25-11 requires
repetitive inspections for cracks along the face of the retraction
attachment boss in the nose landing gear (NLG) sidewall; and corrective
action, if necessary. Since the FAA issued AD 99-25-11, additional
cracking was found that indicated additional airplanes are subject to
the unsafe condition. This proposed AD would continue to require the
actions in AD 99-25-11, and expand the applicability. 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 December
15, 2022.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> 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.
<bullet> 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 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
<a href="/cdn-cgi/l/email-protection#a8fae9d8ddcac4c1cbc9dcc1c7c6dbe8cac9cddbd1dbdccdc5db86cbc7c5"><span class="__cf_email__" data-cfemail="e1b3a09194838d88828095888e8f92a183808492989295848c92cf828e8c">[email protected]</span></a>; website <a href="http://baesystems.com/Businesses/RegionalAircraft/index.htm">baesystems.com/Businesses/RegionalAircraft/index.htm</a>. 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 <a href="http://regulations.gov">regulations.gov</a> by searching for
and locating Docket No. FAA-2022-1313; or in person at Docket
Operations between 9 a.m. and 5 p.m., Monday through Friday, except
Federal holidays. The AD docket contains this NPRM, the mandatory
continuing airworthiness
[[Page 65542]]
information (MCAI), any comments received, and other information. The
street address for Docket Operations is listed above. Comments will be
available in the AD docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Todd Thompson, Aerospace Engineer,
Large Aircraft Section, International Validation Branch, FAA, 2200
South 216th St., Des Moines, WA 98198; telephone 206-231-3228; email
<a href="/cdn-cgi/l/email-protection#580c373c3c760c303735282b3736183e3939763f372e"><span class="__cf_email__" data-cfemail="0b5f646f6f255f6364667b7864654b6d6a6a256c647d">[email protected]</span></a>.
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-2022-1313; Project Identifier
MCAI-2021-01418-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
the proposal because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="http://regulations.gov">regulations.gov</a>, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this proposed AD.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to Todd
Thompson, Aerospace Engineer, Large Aircraft Section, International
Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198;
telephone 206-231-3228; email <a href="/cdn-cgi/l/email-protection#de8ab1babaf08ab6b1b3aeadb1b09eb8bfbff0b9b1a8"><span class="__cf_email__" data-cfemail="590d363d3d770d313634292a3637193f3838773e362f">[email protected]</span></a>. Any commentary
that the FAA receives which is not specifically designated as CBI will
be placed in the public docket for this rulemaking.
Background
The FAA issued AD 99-25-11, Amendment 39-11454 (64 FR 72522,
December 28, 1999) (AD 99-25-11), for certain BAE Systems (Operations)
Limited Model BAe 146 and Avro 146-RJ series airplanes. FAA AD 99-25-11
requires repetitive eddy current inspections for cracks along the face
of the retraction attachment boss in the NLG sidewall; and corrective
action, if necessary. FAA AD 99-25-11 was prompted by issuance of
mandatory continuing airworthiness information by a foreign civil
aviation authority. The FAA issued AD 99-25-11 to address cracking
along the face of the retraction attachment boss in the NLG sidewall,
which could result in premature extension of the NLG or result in
depressurization of the airplane.
FAA AD 99-25-11 corresponds to British AD 015-10-98.
Actions Since AD 99-25-11 Was Issued
Since the FAA issued AD 99-25-11, the FAA has determined that
additional airplanes are subject to the identified unsafe condition.
The Civil Aviation Authority (CAA), which is the aviation authority
for the United Kingdom, has issued CAA AD G-2021-0016R1, dated February
18, 2022 (U.K. CAA AD G-2021-0016R1) (also referred to after this as
the MCAI), to correct an unsafe condition for certain BAE Systems
(Operations) Limited Model BAe 146 and Avro 146-RJ series airplanes.
U.K. CAA AD G-2021-0016R1 superseded EASA AD 2007-0305, dated December
20, 2007, which superseded British AD 015-10-98. The FAA did not issue
an AD corresponding to EASA AD 2007-0305.
Evidence of cracking was found on several in-service airplanes in
the bore and along the face of the retraction jack attachment boss on
the left-hand NLG sidewall. Undetected cracking of the NLG sidewall
could lead to explosive decompression of the fuselage near to the
flightcrew (since the NLG sidewall forms part of the nose fuselage
pressure shell), leading to significant structural damage to the
airframe and/or incapacitation of the flightcrew.
The effectivity of each revision of ISB.53-152 before Revision 8
was limited to airplanes that were not modified by torque tightening
modification HCM01641A in production. BAE Systems (Operations) Limited
has received reports of two airplanes with cracks at the NLG retraction
jack attachment boss; those airplanes were post-modification HCM01641A
and as such were not subject to the requirements of FAA AD 99-25-11. As
a result of new findings and further analysis, BAE Systems (Operations)
Limited issued Revision 8 of ISB.53-152, dated February 19, 2018, which
extends the effectivity to all BAe 146 and Avro 146-RJ airplanes,
except for airplanes post-modification HCM20011A, HCM20012A, HCM20013A,
HCM20313A, HCM20314A, or HMC20315A.
Revisions prior to Revision 8 of ISB.53-152 included provisions for
continued operation with certain crack conditions, which was also
allowed in FAA AD 99-25-11 if approved as specified in paragraph (b) of
this AD. The U.K. CAA and the FAA have determined that continued
operation with known cracks is not acceptable. Therefore, this proposed
AD would not allow flight with cracks.
The FAA is proposing this AD to address cracking along the face of
the retraction attachment boss in the NLG sidewall, which could result
in premature extension of the NLG or result in depressurization of the
airplane. See the MCAI for additional background information.
Related Service Information Under 1 CFR Part 51
BAE Systems (Operations) Limited has issued Inspection Service
Bulletin ISB.53-152, Revision 8, dated February 19, 2018. This service
information describes procedures for repetitive eddy current
inspections for cracking in the bore and along the face of the
retraction attachment boss in the left-hand NLG sidewall and, and
repair or replacement of a cracked sidewall.
This proposed AD would also require British Aerospace Service
Bulletin SB.53-152, dated October 8, 1998, which the Director of the
Federal Register approved for incorporation by reference as of February
1, 2000 (64 FR 72522, December 28, 1999).
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.
FAA's Determination
This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to the FAA's bilateral agreement with the State of Design Authority,
the FAA has been notified of the unsafe condition
[[Page 65543]]
described in the MCAI and service information referenced above. The FAA
is proposing this AD because the FAA evaluated all the relevant
information and determined the unsafe condition described previously is
likely to exist or develop on other products of the same type design.
Proposed Requirements of This NPRM
This proposed AD would retain all of the requirements of AD 99-25-
11 and add airplanes to the applicability. This proposed AD would also
require accomplishing the actions specified in the service information
described previously.
Costs of Compliance
The FAA estimates that this proposed AD affects 20 airplanes of
U.S. registry. The FAA estimates the following costs to comply with
this proposed AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Parts
Action Labor cost cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Retained actions from AD 99-25- 1 work-hour x $85 $0 $85 per inspection cycle. Up to $1,700 per
11. per hour = $85 inspection cycle.
per inspection
cycle.
New proposed actions.......... 2 work-hours x 0 $170 per inspection cycle $3,400 per inspection
$85 per hour = cycle.
$170.
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The FAA has received no definitive data on which to base the cost
estimates for the on-condition actions specified in this proposed AD.
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 has 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) 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 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:
0
a. Removing Airworthiness Directive (AD) 99-25-11, Amendment 39-11454
(64 FR 72522, December 28, 1999); and
0
b. Adding the following new AD:
BAE Systems (Operations) Limited: Docket No. FAA-2022-1313; Project
Identifier MCAI-2021-01418-T.
(a) Comments Due Date
The FAA must receive comments by December 15, 2022.
(b) Affected ADs
This AD replaces AD 99-25-11, Amendment 39-11454 (64 FR 72522,
December 28, 1999) (AD 99-25-11).
(c) Applicability
This AD applies to BAE Systems (Operations) Limited Model BAe
146-100A, -200A, and -300A airplanes; and Model Avro 146-RJ70A, 146-
RJ85A, and 146-RJ100A airplanes; certificated in any category,
without modification HCM20011A, HCM20012A, HCM20013A, HCM20313A,
HCM20314A, or HMC20315A.
(d) Subject
Air Transport Association (ATA) of America Code 53, Fuselage.
(e) Reason
This AD was prompted by a report of a crack found on the left-
hand sidewall well on the nose landing gear (NLG), and by the
determination that additional airplanes are subject to the
identified unsafe condition. We are issuing this AD to address
cracking along the face of the retraction attachment boss in the NLG
sidewall, which could result in premature extension of the NLG or
result in depressurization of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Retained Repetitive Inspections, With New Terminating Action
This paragraph restates the requirements of paragraph (a) of AD
99-25-11, with new terminating action. For airplanes listed in
British Aerospace Service Bulletin SB.53-152, dated October 8, 1998:
Prior to the accumulation of 8,000 total flight cycles, or within
200 flight cycles after February 1, 2000 (the effective date of AD
99-25-11), whichever occurs later, perform an eddy current
inspection to detect cracking along the face of the retraction
attachment boss in the nose landing gear sidewall, in accordance
with British Aerospace Service Bulletin SB.53-152, dated October 8,
1998. Thereafter, repeat the eddy current inspection at intervals
not to exceed 2,600 flight cycles, except as provided in paragraph
(j) of this AD.
(h) Retained Repair, With Revised Repair Approval
This paragraph restates the requirements of paragraph (b) of AD
99-25-11, with revised repair approval.
(1) If any crack is detected before the effective date of this
AD, during any inspection required by paragraph (g) of this AD,
prior to further flight, repair or reinspect in accordance with a
method approved by either the Manager, International Branch, ANM-
116, FAA, Transport Airplane Directorate; or the Civil Aviation
Authority (or its delegated agent). For a repair method to be
approved by the Manager, International Branch, ANM-116, as required
by this
[[Page 65544]]
paragraph, the Manager's approval letter must specifically reference
this AD.
(2) If any crack is detected on or after the effective date of
this AD during any inspection required by paragraph (g) of this AD:
Before further flight, either repair using a method approved by the
Manager, Large Aircraft Section, International Validation Branch,
FAA; or the U.K. Civil Aviation Authority (U.K. CAA); or BAE Systems
(Operations) Limited's U.K. CAA Design Organization Approval (DOA);
or do the replacement specified in paragraph (i) of this AD. If
approved by the DOA, the approval must include the DOA-authorized
signature.
(i) New Requirements: Repetitive Inspections and Corrective Actions
(1) For all airplanes: Before the accumulation of 7,375 total
flight cycles, or within 625 flight cycles after the effective date
of this AD, or within 2,600 flight cycles since the most recent
inspection required by paragraph (g) of this AD, whichever occurs
latest, do an eddy current inspection for cracking in the bore and
along the face of the retraction jack attachment boss in the left-
hand nose landing gear sidewall, in accordance with the
Accomplishment Instructions of BAE Systems (Operations) Limited
Inspection Service Bulletin ISB.53-152, Revision 8, dated February
19, 2018. Before further flight, repair or replace any cracked
sidewall, as applicable, in accordance with BAE Systems (Operations)
Limited Inspection Service Bulletin ISB.53-152, Revision 8, dated
February 19, 2018. Repeat the inspection thereafter at intervals not
to exceed 6,700 flight cycles, except as provided in paragraphs
(i)(1)(i) and (ii) of this AD.
(i) For airplanes on which a repair identified for Option A, D,
or E in Table 1 of BAE Systems (Operations) Limited Inspection
Service Bulletin ISB.53-152, Revision 8, dated February 19, 2018,
has been done: Inspect within 20,000 flight cycles after the repair,
and repeat thereafter at intervals not to exceed 4,000 flight
cycles.
(ii) For airplanes on which the replacement with part number
HC537L0002-000, -002, or -004 identified in Option F in Table 1 of
BAE Systems (Operations) Limited Inspection Service Bulletin ISB.53-
152, Revision 8, dated February 19, 2018, has been done: Inspect
within 20,000 flight cycles after the repair, and repeat thereafter
at intervals not to exceed 4,000 flight cycles.
(2) For airplanes on which re-inspection of cracks was allowed
as specified in paragraph (h)(1) of this AD: Within 2,600 flight
cycles after the most recent inspection required by paragraph (g) of
this AD, repair or replace any cracked sidewall, as applicable, in
accordance with BAE Systems (Operations) Limited Inspection Service
Bulletin ISB.53-152, Revision 8, dated February 19, 2018.
(j) Terminating Action
(1) Accomplishment of the initial inspection and applicable
corrective actions required by paragraph (i) of this AD terminates
the repetitive inspection requirements of paragraph (g) of this AD.
(2) Accomplishment of the action identified for Option B or C in
Table 1 of BAE Systems (Operations) Limited Inspection Service
Bulletin ISB.53-152, Revision 8, dated February 19, 2018, terminates
the repetitive inspection requirements of paragraphs (g) and (i)(1)
of this AD.
(3) Accomplishment of the replacement with part number
HC537L0002-006 identified for Option F in Table 1 of BAE Systems
(Operations) Limited Inspection Service Bulletin ISB.53-152,
Revision 8, dated February 19, 2018, terminates the repetitive
inspection requirements of paragraphs (g) and (i)(1) of this AD.
(k) Credit for Previous Actions
(1) This paragraph provides credit for actions required by
paragraphs (i) and (j)(2) of this AD, if those actions were
performed before the effective date of this AD using the service
information identified in paragraphs (k)(1)(i) and (ii) of this AD.
(i) BAE Systems (Operations) Limited Inspection Service Bulletin
ISB.53-152, Revision 6, dated March 5, 2014.
(ii) BAE Systems (Operations) Limited Inspection Service
Bulletin ISB.53-152, Revision 7, dated May 7, 2014.
(2) This paragraph provides credit for the actions required by
paragraph (j)(3) of this AD, if those actions were performed before
the effective date of this AD using the service information
identified in paragraphs (k)(2)(i) and (ii) of this AD, provided the
sidewall replacement for Option F was part number HC537L0002-006.
(i) BAE Systems (Operations) Limited Inspection Service Bulletin
ISB.53-152, Revision 6, dated March 5, 2014.
(ii) BAE Systems (Operations) Limited Inspection Service
Bulletin ISB.53-152, Revision 7, dated May 7, 2014.
(l) No Reporting Requirement
Although BAE Systems (Operations) Limited Inspection Service
Bulletin ISB.53-152, Revision 8, dated February 19, 2018, specifies
to submit certain information to the manufacturer, this AD does not
include that requirement.
(m) 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 (n)(2) of
this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#ab9286eafdf886eae2f9869c989b86eae6e4e8ebcdcaca85ccc4dd"><span class="__cf_email__" data-cfemail="0b32264a5d58264a4259263c383b264a4644484b6d6a6a256c647d">[email protected]</span></a>.
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: As of the effective date of
this AD, for any requirement in this AD to obtain instructions from
a manufacturer, the instructions must be accomplished using a method
approved by the Manager, International Validation Branch, FAA; or
the U.K. CAA; or BAE Systems (Operations) Limited's U.K. CAA DOA. If
approved by the DOA, the approval must include the DOA-authorized
signature.
(n) Related Information
(1) For related information, refer to U.K. CAA AD G-2021-0016R1,
dated February 18, 2022. This mandatory continuing airworthiness
information (MCAI) may be found in the AD docket at <a href="http://regulations.gov">regulations.gov</a>
by searching for and locating Docket No. FAA-2022-1313.
(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
206-231-3228; email <a href="/cdn-cgi/l/email-protection#94c0fbf0f0bac0fcfbf9e4e7fbfad4f2f5f5baf3fbe2"><span class="__cf_email__" data-cfemail="b5e1dad1d19be1dddad8c5c6dadbf5d3d4d49bd2dac3">[email protected]</span></a>.
(3) For service information identified in this AD, 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
<a href="/cdn-cgi/l/email-protection#5b091a2b2e393732383a2f323435281b393a3e2822282f3e362875383436"><span class="__cf_email__" data-cfemail="c49685b4b1a6a8ada7a5b0adabaab784a6a5a1b7bdb7b0a1a9b7eaa7aba9">[email protected]</span></a>; website <a href="http://baesystems.com/Businesses/RegionalAircraft/index.htm">baesystems.com/Businesses/RegionalAircraft/index.htm</a>. 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.
Issued on October 20, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2022-23201 Filed 10-28-22; 8:45 am]
BILLING CODE 4910-13-P
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