Airworthiness Directives; Learjet Inc. Model 45 Airplanes, 64851-64854 [2011-27010]
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Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules
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. Is not a ‘‘significant rule’’ under the
DOT Regulatory Policies and Procedures
(44 FR 11034, February 26, 1979); 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.
We prepared a regulatory evaluation
of the estimated costs to comply with
this proposed AD and placed it in the
AD docket.
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 AD:
Bombardier, Inc.: Docket No. FAA–2011–
1088; Directorate Identifier 2011–NM–
099–AD.
Comments Due Date
(a) We must receive comments by
December 5, 2011.
Affected ADs
(b) None.
srobinson on DSK4SPTVN1PROD with PROPOSALS
Applicability
(c) This AD applies to Bombardier, Inc.
Model DHC–8–400, –401, and –402
airplanes; certificated in any category; serial
numbers 4161 through 4296 inclusive.
Subject
(d) Air Transport Association (ATA) of
America Code 53: Fuselage.
Reason
(e) The mandatory continuing
airworthiness information (MCAI) states:
Several operators have reported difficulties
in opening the airstair door. Investigation
revealed that the airstair door gearbox drain
paths were blocked by sealant, causing water
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16:22 Oct 18, 2011
Jkt 226001
to accumulate and freeze in the gearbox
assembly. An airstair door that is unable to
be opened could hinder evacuation in the
event of an emergency.
*
*
*
*
*
BILLING CODE 4910–13–P
(f) You are responsible for having the
actions required by this AD performed within
the compliance times specified, unless the
actions have already been done.
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Actions
(g) Within 600 flight hours after the
effective date of this AD, do a general visual
inspection of the structure and gearbox drain
paths for blockages by sealant, in accordance
with the Accomplishment Instructions of
Bombardier Service Bulletin 84–53–48, dated
December 2, 2010. If any blockages are found,
before further flight, remove blockages in
accordance with the Accomplishment
Instructions of Bombardier Service Bulletin
84–53–48, dated December 2, 2010.
FAA AD Differences
Note 1: This AD differs from the MCAI
and/or service information as follows: No
differences.
Other FAA AD Provisions
(h) 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
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 410, 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.
Related Information
(i) Refer to MCAI Transport Canada Civil
Aviation (TCCA) Airworthiness Directive
CF–2011–06, dated April 26, 2011; and
Bombardier Service Bulletin 84–53–48, dated
December 2, 2010; for related information.
Frm 00013
Issued in Renton, Washington, on October
6, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 2011–27023 Filed 10–18–11; 8:45 am]
Compliance
PO 00000
64851
Fmt 4702
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14 CFR Part 39
[Docket No. FAA–2011–1069; Directorate
Identifier 2011–NM–025–AD]
RIN 2120–AA64
Airworthiness Directives; Learjet Inc.
Model 45 Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for the
products listed above. This proposed
AD would require revising the
maintenance program to include new or
more restrictive life-limits and
inspections. This proposed AD was
prompted by changes to the
Airworthiness Limitations Section
(ALS) of the maintenance manual,
which adds life-limits, revises lifelimits, or adds inspections not
previously identified. We are proposing
this AD to limit exposure of flight
critical components to corrosion,
cracking, or failure due to life-limits,
which if not corrected, could result in
loss of roll control, fatigue cracking, or
loss of structural components.
DATES: We must receive comments on
this proposed AD by December 5, 2011.
ADDRESSES: You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://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 proposed AD, contact Learjet, Inc.,
One Learjet Way, Wichita, Kansas
67209–2942; phone 316–946–2000; fax
316–946–2220; e-mail
ac.ict@aero.bombardier.com; Internet
SUMMARY:
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64852
Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules
https://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 https://
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 proposed AD, the
regulatory evaluation, any comments
received, and other information. The
street address for the Docket Office
(phone: 800–647–5527) is in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT:
William Griffith, Aerospace Engineer,
Airframe Branch, ACE–118W, FAA,
Wichita Aircraft Certification Office,
1801 Airport Road, Room 100, MidContinent Airport, Wichita, Kansas
67209; phone: 316–946–4116; fax: 316–
946–4107; e-mail:
William.E.Griffith@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written
relevant data, views, or arguments about
this proposal. Send your comments to
an address listed under the ADDRESSES
section. Include ‘‘Docket No. FAA–
2011–1069; Directorate Identifier 2011–
NM–025–AD’’ at the beginning of your
comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
aspects of this proposed AD. We will
consider all comments received by the
closing date and may amend this
proposed AD because of those
comments.
We will post all comments we
receive, without change, to https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact we receive
about this proposed AD.
Discussion
We have reviewed the design
approval holder’s changes to the ALS of
the maintenance manual, which adds
life-limits, revises life-limits, or adds
inspections not previously identified.
These changes resulted from the design
holder’s analysis, testing, and in-service
history of certain components. We are
proposing this AD to limit exposure of
flight critical components to corrosion,
cracking, or failure due to life-limits,
which if not corrected, could result in
loss of roll control, fatigue cracking, or
loss of structural components. The
corrective action is revising the
maintenance program.
Relevant Service Information
We reviewed Chapter 04,
Airworthiness Limitations, of the
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; and Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011. This service information describes
component and system checks and
replacements and includes new or
revised life-limits and new inspections.
FAA’s Determination
We are proposing this AD because we
evaluated all the relevant information
and determined the unsafe condition
described previously is likely to exist or
develop in other products of the same
type design.
Proposed AD Requirements
This proposed AD would require
accomplishing the actions specified in
the service information described
previously.
Costs of Compliance
We estimate that this proposed AD
affects 336 of U.S. registry.
We estimate the following costs to
comply with this proposed AD:
ESTIMATED COSTS
Action
Labor cost
Parts cost
Cost per
product
Cost on U.S.
operators
Change ALS in maintenance manual .............
1 work-hour × $85 per hour = $85 .................
$0
$85
$28,560
srobinson on DSK4SPTVN1PROD with PROPOSALS
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
VerDate Mar<15>2010
16:22 Oct 18, 2011
Jkt 226001
products identified in this rulemaking
action.
Regulatory Findings
We 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) Is not a ‘‘significant rule’’ under
the DOT Regulatory Policies and
Procedures (44 FR 11034, February 26,
1979),
PO 00000
Frm 00014
Fmt 4702
Sfmt 4702
(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.
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:
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Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules
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):
Learjet Inc.: Docket No. FAA–2011–1069;
Directorate Identifier 2011–NM–025–AD.
Comments Due Date
(a) We must receive comments by
December 5, 2011.
accomplish the inspections 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 (i) of this
AD. The request should include a description
of changes to the required actions that will
ensure the continued operational safety of
the airplane. The FAA has provided guidance
for this determination in Advisory Circular
(AC) 25.1529–1A.
Affected ADs
(b) None
Subject
(d) Joint Aircraft System Component
(JASC)/Air Transport Association (ATA) of
America Code 05: Periodic Inspections.
Applicability
(c) This AD applies to all Learjet Inc.
Model 45 airplanes, certificated in any
category.
Note 1: This AD requires 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 these
actions, the operator may not be able to
Unsafe Condition
(e) This AD was prompted by changes to
the Airworthiness Limitations Section (ALS)
of the maintenance manual (MM), which
adds life-limits, revises life-limits, or adds
inspections not previously identified. We are
issuing this AD to limit exposure of flight
critical components to corrosion, cracking, or
failure due to life-limits, which if not
corrected, could result in loss of roll control,
fatigue cracking, or loss of structural
components.
64853
Compliance
(f) Comply with this AD within the
compliance times specified, unless already
done.
Maintenance Program Revision
(g) Within 90 days after the effective date
of this AD, revise the maintenance program
by incorporating the applicable inspection
reference number (IRN) tasks identified in
table 1 of this AD as specified in Chapter 04,
Airworthiness Limitations, of the Bombardier
Learjet 45 Maintenance Manual MM–104,
Revision 53, dated January 10, 2011; or
Bombardier Learjet 40 Maintenance Manual
MM–105, Revision 21, dated January 10,
2011; as applicable. The initial task
compliance time is within 90 days after the
effective date of this AD, or the applicable
initial compliance time specified in Table 1
of this AD, whichever is later.
Note 2: IRN # R2710041 shown in table 1
of this AD is identified as IRN # N2710041
in prior revisions of Bombardier Learjet 45
Maintenance Manual MM–104; and
Bombardier Learjet 40 Maintenance Manual
MM–105.
TABLE 1—IRN TASK REVISION
IRN #—
Initial compliance time—
Model 40, 45 ......
R2710041 ...............................................
Model 40, 45 ......
Q5510091 ..............................................
Within 10 years after the date of
issuance of the original standard airworthiness certificate or the date of
issuance of the original export certificate of airworthiness, or within 10
years after the most recent replacement, whichever occurs later.
Within 600 flight hours after the most
recent inspection done in accordance
with IRN # Q5510091.
Model 40, 45 ......
Q5530011 ..............................................
Before the accumulation of 9,600 total
flight hours.
Model 40, 45 ......
P3220007 ...............................................
Within 48 months after the most recent
inspection done in accordance with
IRN # P3220007.
Model 40, 45 ......
srobinson on DSK4SPTVN1PROD with PROPOSALS
Model—
P3220146 ...............................................
Before the accumulation of 4,800 total
landings.
Model 40, 45 ......
N3220012,
N3220023,
N3220035,
N3220036, and N3220037.
Before the accumulation of 10,000 total
landings on the component.
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16:22 Oct 18, 2011
Jkt 226001
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E:\FR\FM\19OCP1.SGM
Chapter 04 of these documents—
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; or Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011; as applicable.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; or Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011; as applicable.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; or Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011; as applicable.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; or Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011; as applicable.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; or Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011; as applicable.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; or Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011; as applicable.
19OCP1
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Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules
TABLE 1—IRN TASK REVISION—Continued
Model—
IRN #—
Initial compliance time—
Model 40, 45 ......
N3220103, N3220104, N3220105, and
N3220106.
Before the accumulation of 17,000 total
landings on the component.
Model 45 ............
N5710147, N5710171, and N5710173 ..
Before the accumulation of 6,500 total
flight hours.
Model 45 ............
N5710175 ...............................................
Before the accumulation of 6,900 total
flight hours.
Model 45 ............
N5710177 ...............................................
Before the accumulation of 7,000 total
flight hours.
No Alternative Intervals
(h) After accomplishing the revisions
required by paragraphs (g) of this AD, no
alternative IRN task or IRN task interval may
be used unless the IRN task or IRN task
interval is approved as an AMOC in
accordance with the procedures specified in
paragraph (i)(1) of this AD.
Chapter 04 of these documents—
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011; or Bombardier
Learjet 40 Maintenance Manual MM–
105, Revision 21, dated January 10,
2011; as applicable.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011.
Bombardier Learjet 45 Maintenance
Manual MM–104, Revision 53, dated
January 10, 2011.
Issued in Renton, Washington, on October
5, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
management issue shows two categories of
scenarios that could lead to thrust asymmetry
during landing with controllability and
deceleration consequences [.]
[FR Doc. 2011–27010 Filed 10–18–11; 8:45 am]
These thrust asymmetry conditions, if not
corrected, could result in loss of control of
the aeroplane during landing.
BILLING CODE 4910–13–P
*
*
*
*
*
Alternative Methods of Compliance
(AMOCs)
DEPARTMENT OF TRANSPORTATION
(i)(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.
Federal Aviation Administration
*
*
*
*
*
The proposed AD would require actions
that are intended to address the unsafe
condition described in the MCAI.
14 CFR Part 39
DATES:
[Docket No. FAA–2011–1087; Directorate
Identifier 2011–NM–032–AD]
ADDRESSES:
srobinson on DSK4SPTVN1PROD with PROPOSALS
(j) For more information about this AD,
contact William Griffith, Aerospace Engineer,
Airframe Branch, ACE–118W, FAA, Wichita
Aircraft Certification Office, 1801 Airport
Road, Room 100, Mid-Continent Airport,
Wichita, Kansas 67209; phone: 316–946–
4116; fax: 316–946–4107; e-mail:
William.E.Griffith@faa.gov.
(k) 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; e-mail
ac.ict@aero.bombardier.com; Internet https://
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.
16:22 Oct 18, 2011
RIN 2120–AA64
Airworthiness Directives; Airbus Model
A318, A319, A320, and A321 Series
Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for the
products listed above that would
supersede two existing ADs. This
proposed AD results from mandatory
continuing airworthiness information
(MCAI) originated by an aviation
authority of another country to identify
and correct an unsafe condition on an
aviation product. The MCAI describes
the unsafe condition as:
SUMMARY:
Related Information
VerDate Mar<15>2010
We must receive comments on
this proposed AD by December 5, 2011.
Jkt 226001
Following in-service experience, analyses
of the failure to follow procedure or heed
existing cockpit cues were conducted to
assess the consequences of mismanagement
of thrust levers during landing.
The investigation results identified the
need for improvements in the identification
of throttle mis-positioning and so providing
further opportunity for the flight crew to
identify an incorrect thrust lever
configuration and to correct this. * * * In
addition, the analysis of the thrust lever
PO 00000
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Sfmt 4702
You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://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: U.S. Department of
Transportation, Docket Operations,
M–30, West Building Ground Floor,
Room W12–140, 1200 New Jersey
Avenue, SE., Washington, DC, between
9 a.m. and 5 p.m., Monday through
Friday, except Federal holidays.
For service information identified in
this proposed AD, contact Airbus,
Airworthiness Office—EAS, 1 Rond
Point Maurice Bellonte, 31707 Blagnac
Cedex, France; telephone +33 5 61 93 36
96; fax +33 5 61 93 44 51; e-mail:
account.airworth-eas@airbus.com;
Internet https://www.airbus.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.
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]]>Agencies
[Federal Register Volume 76, Number 202 (Wednesday, October 19, 2011)]
[Proposed Rules]
[Pages 64851-64854]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-27010]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2011-1069; Directorate Identifier 2011-NM-025-AD]
RIN 2120-AA64
Airworthiness Directives; Learjet Inc. Model 45 Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: We propose to adopt a new airworthiness directive (AD) for the
products listed above. This proposed AD would require revising the
maintenance program to include new or more restrictive life-limits and
inspections. This proposed AD was prompted by changes to the
Airworthiness Limitations Section (ALS) of the maintenance manual,
which adds life-limits, revises life-limits, or adds inspections not
previously identified. We are proposing this AD to limit exposure of
flight critical components to corrosion, cracking, or failure due to
life-limits, which if not corrected, could result in loss of roll
control, fatigue cracking, or loss of structural components.
DATES: We must receive comments on this proposed AD by December 5,
2011.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to https://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 proposed AD, contact
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942; phone 316-
946-2000; fax 316-946-2220; e-mail ac.ict@aero.bombardier.com; Internet
[[Page 64852]]
https://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 https://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 proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Office (phone: 800-647-5527) is in the ADDRESSES
section. Comments will be available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT: William Griffith, Aerospace Engineer,
Airframe Branch, ACE-118W, FAA, Wichita Aircraft Certification Office,
1801 Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas
67209; phone: 316-946-4116; fax: 316-946-4107; e-mail:
William.E.Griffith@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include ``Docket No. FAA-2011-1069;
Directorate Identifier 2011-NM-025-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD because of those comments.
We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
We have reviewed the design approval holder's changes to the ALS of
the maintenance manual, which adds life-limits, revises life-limits, or
adds inspections not previously identified. These changes resulted from
the design holder's analysis, testing, and in-service history of
certain components. We are proposing this AD to limit exposure of
flight critical components to corrosion, cracking, or failure due to
life-limits, which if not corrected, could result in loss of roll
control, fatigue cracking, or loss of structural components. The
corrective action is revising the maintenance program.
Relevant Service Information
We reviewed Chapter 04, Airworthiness Limitations, of the
Bombardier Learjet 45 Maintenance Manual MM-104, Revision 53, dated
January 10, 2011; and Bombardier Learjet 40 Maintenance Manual MM-105,
Revision 21, dated January 10, 2011. This service information describes
component and system checks and replacements and includes new or
revised life-limits and new inspections.
FAA's Determination
We are proposing this AD because we evaluated all the relevant
information and determined the unsafe condition described previously is
likely to exist or develop in other products of the same type design.
Proposed AD Requirements
This proposed AD would require accomplishing the actions specified
in the service information described previously.
Costs of Compliance
We estimate that this proposed AD affects 336 of U.S. registry.
We estimate the following costs to comply with this proposed AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Change ALS in maintenance manual.... 1 work-hour x $85 per $0 $85 $28,560
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.
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
We 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) Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979),
(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.
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:
[[Page 64853]]
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new
airworthiness directive (AD):
Learjet Inc.: Docket No. FAA-2011-1069; Directorate Identifier 2011-
NM-025-AD.
Comments Due Date
(a) We must receive comments by December 5, 2011.
Affected ADs
(b) None
Applicability
(c) This AD applies to all Learjet Inc. Model 45 airplanes,
certificated in any category.
Note 1: This AD requires 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 these actions, the operator may not be
able to accomplish the inspections 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 (i) of this AD. The request should include a
description of changes to the required actions that will ensure the
continued operational safety of the airplane. The FAA has provided
guidance for this determination in Advisory Circular (AC) 25.1529-
1A.
Subject
(d) Joint Aircraft System Component (JASC)/Air Transport
Association (ATA) of America Code 05: Periodic Inspections.
Unsafe Condition
(e) This AD was prompted by changes to the Airworthiness
Limitations Section (ALS) of the maintenance manual (MM), which adds
life-limits, revises life-limits, or adds inspections not previously
identified. We are issuing this AD to limit exposure of flight
critical components to corrosion, cracking, or failure due to life-
limits, which if not corrected, could result in loss of roll
control, fatigue cracking, or loss of structural components.
Compliance
(f) Comply with this AD within the compliance times specified,
unless already done.
Maintenance Program Revision
(g) Within 90 days after the effective date of this AD, revise
the maintenance program by incorporating the applicable inspection
reference number (IRN) tasks identified in table 1 of this AD as
specified in Chapter 04, Airworthiness Limitations, of the
Bombardier Learjet 45 Maintenance Manual MM-104, Revision 53, dated
January 10, 2011; or Bombardier Learjet 40 Maintenance Manual MM-
105, Revision 21, dated January 10, 2011; as applicable. The initial
task compliance time is within 90 days after the effective date of
this AD, or the applicable initial compliance time specified in
Table 1 of this AD, whichever is later.
Note 2: IRN R2710041 shown in table 1 of this AD is
identified as IRN N2710041 in prior revisions of
Bombardier Learjet 45 Maintenance Manual MM-104; and Bombardier
Learjet 40 Maintenance Manual MM-105.
Table 1--IRN Task Revision
------------------------------------------------------------------------
Initial Chapter 04 of
Model-- IRN -- compliance these
time-- documents--
------------------------------------------------------------------------
Model 40, 45......... R2710041....... Within 10 years Bombardier
after the date Learjet 45
of issuance of Maintenance
the original Manual MM-104,
standard Revision 53,
airworthiness dated January
certificate or 10, 2011; or
the date of Bombardier
issuance of Learjet 40
the original Maintenance
export Manual MM-105,
certificate of Revision 21,
airworthiness, dated January
or within 10 10, 2011; as
years after applicable.
the most
recent
replacement,
whichever
occurs later.
Model 40, 45......... Q5510091....... Within 600 Bombardier
flight hours Learjet 45
after the most Maintenance
recent Manual MM-104,
inspection Revision 53,
done in dated January
accordance 10, 2011; or
with IRN Bombardier
Learjet 40
Q5510091. Maintenance
Manual MM-105,
Revision 21,
dated January
10, 2011; as
applicable.
Model 40, 45......... Q5530011....... Before the Bombardier
accumulation Learjet 45
of 9,600 total Maintenance
flight hours. Manual MM-104,
Revision 53,
dated January
10, 2011; or
Bombardier
Learjet 40
Maintenance
Manual MM-105,
Revision 21,
dated January
10, 2011; as
applicable.
Model 40, 45......... P3220007....... Within 48 Bombardier
months after Learjet 45
the most Maintenance
recent Manual MM-104,
inspection Revision 53,
done in dated January
accordance 10, 2011; or
with IRN Bombardier
Learjet 40
P3220007. Maintenance
Manual MM-105,
Revision 21,
dated January
10, 2011; as
applicable.
Model 40, 45......... P3220146....... Before the Bombardier
accumulation Learjet 45
of 4,800 total Maintenance
landings. Manual MM-104,
Revision 53,
dated January
10, 2011; or
Bombardier
Learjet 40
Maintenance
Manual MM-105,
Revision 21,
dated January
10, 2011; as
applicable.
Model 40, 45......... N3220012, Before the Bombardier
N3220023, accumulation Learjet 45
N3220035, of 10,000 Maintenance
N3220036, and total landings Manual MM-104,
N3220037. on the Revision 53,
component. dated January
10, 2011; or
Bombardier
Learjet 40
Maintenance
Manual MM-105,
Revision 21,
dated January
10, 2011; as
applicable.
[[Page 64854]]
Model 40, 45......... N3220103, Before the Bombardier
N3220104, accumulation Learjet 45
N3220105, and of 17,000 Maintenance
N3220106. total landings Manual MM-104,
on the Revision 53,
component. dated January
10, 2011; or
Bombardier
Learjet 40
Maintenance
Manual MM-105,
Revision 21,
dated January
10, 2011; as
applicable.
Model 45............. N5710147, Before the Bombardier
N5710171, and accumulation Learjet 45
N5710173. of 6,500 total Maintenance
flight hours. Manual MM-104,
Revision 53,
dated January
10, 2011.
Model 45............. N5710175....... Before the Bombardier
accumulation Learjet 45
of 6,900 total Maintenance
flight hours. Manual MM-104,
Revision 53,
dated January
10, 2011.
Model 45............. N5710177....... Before the Bombardier
accumulation Learjet 45
of 7,000 total Maintenance
flight hours. Manual MM-104,
Revision 53,
dated January
10, 2011.
------------------------------------------------------------------------
No Alternative Intervals
(h) After accomplishing the revisions required by paragraphs (g)
of this AD, no alternative IRN task or IRN task interval may be used
unless the IRN task or IRN task interval is approved as an AMOC in
accordance with the procedures specified in paragraph (i)(1) of this
AD.
Alternative Methods of Compliance (AMOCs)
(i)(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.
Related Information
(j) For more information about this AD, contact William
Griffith, Aerospace Engineer, Airframe Branch, ACE-118W, FAA,
Wichita Aircraft Certification Office, 1801 Airport Road, Room 100,
Mid-Continent Airport, Wichita, Kansas 67209; phone: 316-946-4116;
fax: 316-946-4107; e-mail: William.E.Griffith@faa.gov.
(k) 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; e-mail
ac.ict@aero.bombardier.com; Internet https://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.
Issued in Renton, Washington, on October 5, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2011-27010 Filed 10-18-11; 8:45 am]
BILLING CODE 4910-13-P
