Airworthiness Directives; Learjet Inc. Model 45 Airplanes, 12667-12670 [2010-5669]
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Federal Register / Vol. 75, No. 51 / Wednesday, March 17, 2010 / Rules and Regulations
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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
Adoption of the Amendment
Accordingly, pursuant to the authority
delegated to me by the Administrator,
the Federal Aviation Administration
amends part 39 of the Federal Aviation
Regulations (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.
it in accordance with the Accomplishment
Instructions, paragraphs 3.A.(1) through
3.A.(9), in Sikorsky Alert Service Bulletin
No. 76–32–30, dated April 8, 2009.
(b) To request a different method of
compliance or a different compliance time
for this AD, follow the procedures in 14 CFR
39.19. Contact the Manager, Boston Aircraft
Certification Office, FAA, Attn: Terry Fahr,
12 New England Executive Park, Burlington,
MA 01803, telephone (781) 238–7155, fax
(781) 238–7170.
(c) The inspection shall be done in
accordance with the specified portions of
Sikorsky Alert Service Bulletin No. 76–32–
30, dated April 8, 2009. The Director of the
Federal Register approved this incorporation
by reference in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. Copies may be
obtained from Sikorsky Aircraft Corporation,
Attn: Manager, Commercial Technical
Support, mailstop s581a, 6900 Main Street,
Stratford, CT, telephone (203) 383–4866, email address tsslibrary@sikorsky.com, or at
https://www.sikorsky.com. Copies may be
inspected at the FAA, Office of the Regional
Counsel, Southwest Region, 2601 Meacham
Blvd., Room 663, Fort Worth, Texas or 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: https://
www.archives.gov/federal_register/
code_of_federal_regulations/
ibr_locations.html.
Joint Aircraft System/Component (JASC)
Code
(d) JASC Code 3212: Emergency Flotation
Systems.
(e) This amendment becomes effective on
April 1, 2010.
Issued in Fort Worth, Texas, on February
3, 2010.
Mark R. Schilling,
Acting Manager, Rotorcraft Directorate,
Aircraft Certification Service.
[FR Doc. 2010–5294 Filed 3–16–10; 8:45 am]
§ 39.13
[Amended]
BILLING CODE 4910–13–P
2. Section 39.13 is amended by adding
a new airworthiness directive to read as
follows:
wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
■
2010–06–08 Sikorsky Aircraft Corporation:
Amendment 39–16232. Docket No.
FAA–2010–0242; Directorate Identifier
2009–SW–27–AD.
Applicability: Sikorsky Aircraft
Corporation Model S–76C helicopters, serial
numbers 760501 and 760506 through 760761,
with Option Code 88051 Flotation System
installed by Keystone Helicopter
Corporation, certificated in any category.
Compliance: Before the next flight over
water, or within 30 days, whichever occurs
first, unless accomplished previously.
To determine if a metallic foil shunt is
installed in the flotation system, which could
prevent the flotation system from deploying
and could prevent the helicopter from
staying afloat long enough to enable
emergency evacuation after a water landing,
accomplish the following:
(a) Inspect the flotation system connector
and if a metallic foil shunt is found, remove
VerDate Nov<24>2008
14:47 Mar 16, 2010
Jkt 220001
DEPARTMENT OF TRANSPORTATION
12667
and missing ballscrew assembly sleeves
of the flap actuator, repetitive nondestructive liquid penetrant inspections
of each sleeve or flap actuator for cracks,
and replacement or modification of the
flap actuator if necessary. This AD
results from reports of cracked and
missing ballscrew assembly sleeves of
the flap actuators. We are issuing this
AD to detect and correct cracked and
missing sleeves, which could cause loss
of the load-carrying ball bearings on
both actuators on one flap, resulting in
flap asymmetry and loss of control of
the airplane.
DATES: This AD is effective April 1,
2010.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in the AD
as of April 1, 2010.
We must receive comments on this
AD by May 3, 2010.
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: U.S. Department of
Transportation, Docket Operations, M–
30, West Building Ground Floor, Room
W12–140, 1200 New Jersey Avenue, SE.,
Washington, DC 20590, between 9 a.m.
and 5 p.m., Monday through Friday,
except Federal holidays.
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.
Federal Aviation Administration
Examining the AD Docket
14 CFR Part 39
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 AD, the regulatory
evaluation, any comments received, and
other information. The street address for
the Docket Office (telephone 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-
[Docket No. FAA–2010–0226; Directorate
Identifier 2010–NM–034–AD; Amendment
39–16238; AD 2010–06–13]
RIN 2120–AA64
Airworthiness Directives; Learjet Inc.
Model 45 Airplanes
AGENCY: Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule; request for
comments.
SUMMARY: We are adopting a new
airworthiness directive (AD) for certain
Model 45 airplanes. This AD requires a
general visual inspection for cracked
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Federal Register / Vol. 75, No. 51 / Wednesday, March 17, 2010 / Rules and Regulations
Differences Between the AD and the
Service Information
Continent Airport, Wichita, Kansas
67209; telephone (316) 946–4116; fax
(316) 946–4107.
SUPPLEMENTARY INFORMATION:
Discussion
We have received reports of cracked
and missing ballscrew assembly sleeves
of the flap actuators. Three flap
actuators were found with the ballnut
sleeves corroded and cracked. Three
additional airplanes were discovered to
contain similar corrosion on the ballnut
sleeves. The root cause is galvanic
corrosion due to an aluminum sleeve
installed on a steel ballnut. This
condition, if not corrected, could cause
loss of the load-carrying ball bearings on
both actuators on one flap, resulting in
flap asymmetry and loss of control of
the airplane.
Relevant Service Information
We reviewed Bombardier (Learjet)
Alert Service Bulletins A45–27–40 (for
Model 45 airplanes, serial numbers 45–
005 through 45–380), and A40–27–24
(for Model 45 airplanes, serial numbers
45–2001 through 45–2111), both dated
January 11, 2010. These service
bulletins describe procedures for a
general visual inspection for cracked
and missing ballscrew assembly sleeves
of the flap actuator; a non-destructive
liquid penetrant inspection for cracks of
each sleeve and flap actuator,
depending on the findings; and
replacement of the flap actuator and
ballscrew actuator sleeve if the sleeve is
cracked along its entire length.
We also reviewed Bombardier
(Learjet) Optional Service Bulletins 45–
27–41 (for Model 45 airplanes, serial
numbers 45–005 through 45–380), and
40–27–25 (for Model 45 airplanes, serial
numbers 45–2001 through 45–2111),
both dated January 11, 2010. These
service bulletins describe procedures for
modifying the flap actuator if a certain
crack length is found and the part does
not need to be replaced.
wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
FAA’s Determination and Requirements
of This AD
We are issuing 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. This AD requires
accomplishing the actions specified in
the service information described
previously, except as discussed under
‘‘Differences Between the AD and the
Service Information.’’
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14:47 Mar 16, 2010
Jkt 220001
Although Bombardier (Learjet) Alert
Service Bulletins A45–27–40 and A40–
27–24, both dated January 11, 2010,
specify a compliance time of 30 days
after the publication of those service
bulletins, this AD requires a compliance
time of 15 days after the effective date
of this AD. We have received additional
reports of fully cracked sleeves
requiring replacement. Therefore, we
have determined that the 15-day
compliance time is necessary to address
the identified unsafe condition. This
difference has been coordinated with
Learjet.
Although Bombardier (Learjet) Alert
Service Bulletins A45–27–40 and A40–
27–24, both dated January 11, 2010, do
not specify repetitive inspections, this
AD requires operators to repeat the nondestructive liquid penetrant inspections
at intervals not to exceed 6 months. The
repetitive inspections will help
determine the extent of the problem in
the fleet. This difference has been
coordinated with Learjet.
Although Bombardier (Learjet) Alert
Service Bulletins A45–27–40 and A40–
27–24, both dated January 11, 2010,
specify to inspect for missing ballscrew
assembly sleeves, these service bulletins
do not specify a corrective action if any
sleeve is missing. This AD requires
replacing the flap actuator if any sleeve
is missing. This difference has been
coordinated with Learjet.
Bombardier (Learjet) Alert Service
Bulletins A45–27–40 and A40–27–24,
both dated January 11, 2010, specify
modifying or replacing the flap actuator
as corrective action for a cracked sleeve,
depending on the percentage of the
length of the sleeve that is cracked. This
AD instead requires replacing the
actuator if a sleeve is cracked along its
entire length, and modifying the
actuator for any cracked sleeve that is
not cracked along its entire length. This
difference has been coordinated with
Learjet.
Interim Action
We consider this AD interim action.
Learjet Inc. is currently developing a
new modification of the ballscrew
assembly of the flap actuator that will
address the unsafe condition identified
in this AD. Once this modification is
developed, approved, and available, we
might consider additional rulemaking.
FAA’s Justification and Determination
of the Effective Date
We have received reports of cracked
and missing ballscrew assembly sleeves
of the flap actuators. Cracked and
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missing sleeves could result in the loss
of the load-carrying ball bearings from
the assembly, resulting in the loss of the
flap drive load path for that actuator.
Loss of the sleeves on both actuators on
one flap could result in flap asymmetry,
resulting in loss of control of the
airplane. Because of our requirement to
promote safe flight of civil aircraft and
thus the critical need to ensure
structural integrity of the ballscrew
assembly sleeves of the flap actuator
and the short compliance time involved
with this action, this AD must be issued
immediately.
Because an unsafe condition exists
that requires the immediate adoption of
this AD, we find that notice and
opportunity for prior public comment
hereon are impracticable and that good
cause exists for making this amendment
effective in less than 30 days.
Comments Invited
This AD is a final rule that involves
requirements affecting flight safety, and
we did not provide you with notice and
an opportunity to provide your
comments before it becomes effective.
However, we invite you to send any
written data, views, or arguments about
this AD. Send your comments to an
address listed under the ADDRESSES
section. Include ‘‘Docket No. FAA–
2010–0226; Directorate Identifier 2010–
NM–034–AD’’ at the beginning of your
comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
aspects of this AD. We will consider all
comments received by the closing date
and may amend this 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 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.
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
E:\FR\FM\17MRR1.SGM
17MRR1
Federal Register / Vol. 75, No. 51 / Wednesday, March 17, 2010 / Rules and Regulations
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), 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.
You can find our regulatory
evaluation and the estimated costs of
compliance in the AD Docket.
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 AD:
■
wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
2010–06–13 Learjet Inc.: Amendment 39–
16238. Docket No. FAA–2010–0226;
Directorate Identifier 2010–NM–034–AD.
Effective Date
(a) This airworthiness directive (AD) is
effective April 1, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Learjet Inc. Model
45 airplanes, certificated in any category,
serial numbers 45–005 through 45–380
inclusive and 45–2001 through 45–2111
inclusive.
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14:47 Mar 16, 2010
Jkt 220001
Subject
(d) Air Transport Association (ATA) of
America Code 27: Flight Controls.
Unsafe Condition
(e) This AD results from reports of cracked
and missing ballscrew assembly sleeves of
the flap actuators. The Federal Aviation
Administration is issuing this AD to detect
and correct cracked and missing sleeves,
which could cause loss of the load-carrying
ball bearings on both actuators on one flap,
resulting in flap asymmetry and loss of
control of the airplane.
Compliance
(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.
General Visual Inspection
(g) Within 15 days after the effective date
of this AD, do a general visual inspection for
cracked or missing ballscrew assembly
sleeves of the flap actuator, in accordance
with the Accomplishment Instructions of
Bombardier (Learjet) Alert Service Bulletin
A45–27–40 (for Model 45 airplanes, serial
numbers 45–005 through 45–380); or
Bombardier (Learjet) Alert Service Bulletin
A40–27–24 (for Model 45 airplanes, serial
numbers 45–2001 through 45–2111); both
dated January 11, 2010. Thereafter, do the
actions in paragraph (h) or (i), as applicable,
of this AD.
Note 1: For the purposes of this AD, a
general visual inspection is: ‘‘A visual
examination of an interior or exterior area,
installation, or assembly to detect obvious
damage, failure, or irregularity. This level of
inspection is made from within touching
distance unless otherwise specified. A mirror
may be necessary to ensure visual access to
all surfaces in the inspection area. This level
of inspection is made under normally
available lighting conditions such as
daylight, hangar lighting, flashlight, or
droplight and may require removal or
opening of access panels or doors. Stands,
ladders, or platforms may be required to gain
proximity to the area being checked.’’
Non-Destructive Liquid Penetrant Inspection
(Sleeve Is Present and Not Cracked Along Its
Entire Length)
(h) During the general visual inspection
required by paragraph (g) of this AD, if the
sleeve is present and not cracked along its
entire length, before further flight after
accomplishing the general visual inspection,
do a non-destructive liquid penetrant
inspection to detect cracking of the flap
actuators, in accordance with
Accomplishment Instructions of Bombardier
(Learjet) Alert Service Bulletin A45–27–40,
or Bombardier (Learjet) Alert Service Bulletin
A40–27–24, both dated January 11, 2010.
(1) If no crack is found during the nondestructive liquid penetrant inspection,
repeat the inspection thereafter at intervals
not to exceed 6 months.
(2) If any crack is found during the nondestructive liquid penetrant inspection,
before further flight, modify the flap actuator,
in accordance with the Accomplishment
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12669
Instructions of Bombardier (Learjet) Optional
Service Bulletin 45–27–41 (for Model 45
airplanes, serial numbers 45–005 through
45–380); or Bombardier (Learjet) Optional
Service Bulletin 40–27–25 (for Model 45
airplanes, serial numbers 45–2001 through
45–2111); both dated January 11, 2010.
Repeat the non-destructive liquid penetrant
inspection of the half (modified) sleeve
thereafter at intervals not to exceed 6 months.
If any crack is found in any half (modified)
sleeve, before further flight, replace the
sleeve with a new half sleeve, in accordance
with the Accomplishment Instructions of
Bombardier (Learjet) Optional Service
Bulletin 45–27–41, or Bombardier (Learjet)
Optional Service Bulletin 40–27–25, both
dated January 11, 2010, and repeat the nondestructive liquid penetrant inspection of the
half sleeve thereafter at intervals not to
exceed 6 months.
Replacement (Sleeve Is Missing or Cracked
Along Its Entire Length)
(i) During the general visual inspection
required by paragraph (g) of this AD, if the
sleeve is missing or cracked along its entire
length, before further flight after
accomplishing the general visual inspection,
replace the actuator with a new or
serviceable actuator, in accordance with the
Accomplishment Instructions of Bombardier
(Learjet) Alert Service Bulletin A45–27–40,
or Bombardier (Learjet) Alert Service Bulletin
A40–27–24, both dated January 11, 2010.
Within 6 months after any actuator
replacement required by paragraph (i) of this
AD: Do a non-destructive liquid penetrant
inspection to detect cracking of the actuator,
in accordance with Accomplishment
Instructions of Bombardier (Learjet) Alert
Service Bulletin A45–27–40, or Bombardier
(Learjet) Alert Service Bulletin A40–27–24,
both dated January 11, 2010.
(1) If no crack is found during the nondestructive liquid penetrant inspection,
repeat the inspection thereafter at intervals
not to exceed 6 months.
(2) If any crack is found during the nondestructive liquid penetrant inspection, but
the sleeve is not cracked along its entire
length, before further flight, modify the flap
actuator, in accordance with the
Accomplishment Instructions of Bombardier
(Learjet) Optional Service Bulletin 45–27–41,
or Bombardier (Learjet) Optional Service
Bulletin 40–27–25, both dated January 11,
2010. Repeat the non-destructive liquid
penetrant inspection of the half (modified)
sleeves thereafter at intervals not to exceed
6 months. If any crack is found in any half
(modified) sleeve, before further flight,
replace the sleeve with a new half sleeve, in
accordance with the Accomplishment
Instructions of Bombardier (Learjet) Optional
Service Bulletin 45–27–41, or Bombardier
(Learjet) Optional Service Bulletin 40–27–25,
both dated January 11, 2010. Repeat the nondestructive liquid penetrant inspection of the
half sleeve thereafter at intervals not to
exceed 6 months.
(3) If the sleeve is cracked along its entire
length, before further flight, replace the
actuator with a new or serviceable actuator,
in accordance with the Accomplishment
Instructions of Bombardier (Learjet) Optional
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Service Bulletin 45–27–41, or Bombardier
(Learjet) Optional Service Bulletin 40–27–25,
both dated January 11, 2010, and repeat the
non-destructive liquid penetrant inspection
of the sleeve thereafter at intervals not to
exceed 6 months.
Note 2: Guidance on modification of the
flap actuator can be found in Microtecnica
Service Bulletin 27–0018, dated November
24, 2009.
for this AD, follow the procedures in 14 CFR
39.19. Before using any approved AMOC on
any airplane to which the AMOC applies,
notify your principal maintenance inspector
(PMI) or principal avionics inspector (PAI),
as appropriate, or lacking a principal
inspector, your local Flight Standards District
Office. The AMOC approval letter must
specifically reference this AD.
Parts Installation
(j) As of the effective date of this AD, no
person may install, on any airplane, a
ballscrew assembly sleeve of the flap
actuator, unless the actuator has been
modified according to Bombardier (Learjet)
Optional Service Bulletin 45–27–41, or
Bombardier (Learjet) Optional Service
Bulletin 40–27–25, both dated January 11,
2010.
Material Incorporated by Reference
Reporting Requirement
(k) Submit a one-time report of the findings
of the general visual inspection and the
initial non-destructive liquid penetrant
inspection required by this AD to Chris
Broadrick, Bombardier Aerospace, Project
Coordinator—Fielding Specialist, Customer
Support Engineering, One Learjet Way, P.O.
Box 7707, Wichita, Kansas 67209; telephone
316–946–2315; fax 316–946–8908; e-mail
chris.broadrick@aero.bombardier.com; at the
applicable time specified in paragraph (k)(1)
or (k)(2) of this AD. The report must include
airplane serial number, flap actuator part
number, flap actuator serial number, and flap
actuator time in service (in hours). Under the
provisions of the Paperwork Reduction Act
(44 U.S.C. 3501 et seq.), the Office of
Management and Budget (OMB) has
approved the information collection
requirements contained in this AD and has
assigned OMB Control Number 2120–0056.
(1) If the inspection was done on or after
the effective date of this AD: Submit the
report within 10 days after the inspection.
(2) If the inspection was done before the
effective date of this AD: Submit the report
within 10 days after the effective date of this
AD.
wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
Special Flight Permits
(l) Special flight permits may be issued in
accordance with sections 21.197 and 21.199
of the Federal Aviation Regulations (14 CFR
21.197 and 21.199) to operate the airplane to
a location where the airplane can be
modified, unless cracks are discovered in
both an inboard and outboard actuator sleeve
for any flap.
Alternative Methods of Compliance
(AMOCs)
(m)(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. Send information to ATTN:
William Griffith, Aerospace Engineer,
Airframe Branch, ACE–118W, FAA, Wichita
ACO, 1801 Airport Road, Room 100, MidContinent Airport, Wichita, Kansas 67209;
telephone (316) 946–4116; fax (316) 946–
4107.
(2) To request a different method of
compliance or a different compliance time
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14:47 Mar 16, 2010
Jkt 220001
(n) You must use the service information
included in Table 1 of this AD, as applicable,
to do the actions required by this AD, unless
the AD specifies otherwise.
(1) The Director of the Federal Register
approved the incorporation by reference of
this service information under 5 U.S.C.
552(a) and 1 CFR part 51.
(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; e-mail
ac.ict@aero.bombardier.com; Internet https://
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: https://www.archives.gov/federal_register/
code_of_federal_regulations/
ibr_locations.html.
TABLE 1—MATERIAL INCORPORATED
BY REFERENCE
Document
Date
Bombardier (Learjet)
Alert Service Bulletin
A40–27–24.
Bombardier (Learjet)
Alert Service Bulletin
A45–27–40.
Bombardier (Learjet)
Optional Service Bulletin 40–27–25.
Bombardier (Learjet)
Optional Service Bulletin 45–27–41.
January 11, 2010.
January 11, 2010.
January 11, 2010.
January 11, 2010.
Issued in Renton, Washington, on March 9,
2010.
Jeffrey E. Duven,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. 2010–5669 Filed 3–16–10; 8:45 am]
BILLING CODE 4910–13–P
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2009–0642; Directorate
Identifier 2009–NM–001–AD; Amendment
39–16241; AD 2010–06–16]
RIN 2120–AA64
Airworthiness Directives; The Boeing
Company Model 767 Airplanes
AGENCY: Federal Aviation
Administration (FAA), DOT.
ACTION: Final rule.
SUMMARY: We are adopting a new
airworthiness directive (AD) for certain
Model 767 series airplanes. This AD
requires inspections for scribe lines in
the fuselage skin at skin lap joints, the
skin at certain external approved
repairs, the skin around external
features such as antennas, and the skin
at decals; and related investigative and
corrective actions if necessary. This AD
results from reports of scribe lines found
at skin lap joints and butt joints, around
external repairs and antennas, and at
locations where external decals had
been cut. We are issuing this AD to
detect and correct scribe lines, which
can develop into fatigue cracks in the
skin and cause sudden decompression
of the airplane.
DATES: This AD is effective April 21,
2010.
The Director of the Federal Register
approved the incorporation by reference
of a certain publication listed in the AD
as of April 21, 2010.
ADDRESSES: For service information
identified in this AD, contact Boeing
Commercial Airplanes, Attention: Data
& Services Management, P.O. Box 3707,
MC 2H–65, Seattle, Washington 98124–
2207; telephone 206–544–5000,
extension 1; fax 206–766–5680; e-mail
me.boecom@boeing.com; Internet
https:
//www.myboeingfleet.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 AD, the regulatory
evaluation, any comments received, and
E:\FR\FM\17MRR1.SGM
17MRR1
]]>Agencies
[Federal Register Volume 75, Number 51 (Wednesday, March 17, 2010)]
[Rules and Regulations]
[Pages 12667-12670]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-5669]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0226; Directorate Identifier 2010-NM-034-AD;
Amendment 39-16238; AD 2010-06-13]
RIN 2120-AA64
Airworthiness Directives; Learjet Inc. Model 45 Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
-----------------------------------------------------------------------
SUMMARY: We are adopting a new airworthiness directive (AD) for certain
Model 45 airplanes. This AD requires a general visual inspection for
cracked and missing ballscrew assembly sleeves of the flap actuator,
repetitive non-destructive liquid penetrant inspections of each sleeve
or flap actuator for cracks, and replacement or modification of the
flap actuator if necessary. This AD results from reports of cracked and
missing ballscrew assembly sleeves of the flap actuators. We are
issuing this AD to detect and correct cracked and missing sleeves,
which could cause loss of the load-carrying ball bearings on both
actuators on one flap, resulting in flap asymmetry and loss of control
of the airplane.
DATES: This AD is effective April 1, 2010.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in the AD as of April 1, 2010.
We must receive comments on this AD by May 3, 2010.
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: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
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.
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 AD, the regulatory evaluation,
any comments received, and other information. The street address for
the Docket Office (telephone 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-
[[Page 12668]]
Continent Airport, Wichita, Kansas 67209; telephone (316) 946-4116; fax
(316) 946-4107.
SUPPLEMENTARY INFORMATION:
Discussion
We have received reports of cracked and missing ballscrew assembly
sleeves of the flap actuators. Three flap actuators were found with the
ballnut sleeves corroded and cracked. Three additional airplanes were
discovered to contain similar corrosion on the ballnut sleeves. The
root cause is galvanic corrosion due to an aluminum sleeve installed on
a steel ballnut. This condition, if not corrected, could cause loss of
the load-carrying ball bearings on both actuators on one flap,
resulting in flap asymmetry and loss of control of the airplane.
Relevant Service Information
We reviewed Bombardier (Learjet) Alert Service Bulletins A45-27-40
(for Model 45 airplanes, serial numbers 45-005 through 45-380), and
A40-27-24 (for Model 45 airplanes, serial numbers 45-2001 through 45-
2111), both dated January 11, 2010. These service bulletins describe
procedures for a general visual inspection for cracked and missing
ballscrew assembly sleeves of the flap actuator; a non-destructive
liquid penetrant inspection for cracks of each sleeve and flap
actuator, depending on the findings; and replacement of the flap
actuator and ballscrew actuator sleeve if the sleeve is cracked along
its entire length.
We also reviewed Bombardier (Learjet) Optional Service Bulletins
45-27-41 (for Model 45 airplanes, serial numbers 45-005 through 45-
380), and 40-27-25 (for Model 45 airplanes, serial numbers 45-2001
through 45-2111), both dated January 11, 2010. These service bulletins
describe procedures for modifying the flap actuator if a certain crack
length is found and the part does not need to be replaced.
FAA's Determination and Requirements of This AD
We are issuing 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.
This AD requires accomplishing the actions specified in the service
information described previously, except as discussed under
``Differences Between the AD and the Service Information.''
Differences Between the AD and the Service Information
Although Bombardier (Learjet) Alert Service Bulletins A45-27-40 and
A40-27-24, both dated January 11, 2010, specify a compliance time of 30
days after the publication of those service bulletins, this AD requires
a compliance time of 15 days after the effective date of this AD. We
have received additional reports of fully cracked sleeves requiring
replacement. Therefore, we have determined that the 15-day compliance
time is necessary to address the identified unsafe condition. This
difference has been coordinated with Learjet.
Although Bombardier (Learjet) Alert Service Bulletins A45-27-40 and
A40-27-24, both dated January 11, 2010, do not specify repetitive
inspections, this AD requires operators to repeat the non-destructive
liquid penetrant inspections at intervals not to exceed 6 months. The
repetitive inspections will help determine the extent of the problem in
the fleet. This difference has been coordinated with Learjet.
Although Bombardier (Learjet) Alert Service Bulletins A45-27-40 and
A40-27-24, both dated January 11, 2010, specify to inspect for missing
ballscrew assembly sleeves, these service bulletins do not specify a
corrective action if any sleeve is missing. This AD requires replacing
the flap actuator if any sleeve is missing. This difference has been
coordinated with Learjet.
Bombardier (Learjet) Alert Service Bulletins A45-27-40 and A40-27-
24, both dated January 11, 2010, specify modifying or replacing the
flap actuator as corrective action for a cracked sleeve, depending on
the percentage of the length of the sleeve that is cracked. This AD
instead requires replacing the actuator if a sleeve is cracked along
its entire length, and modifying the actuator for any cracked sleeve
that is not cracked along its entire length. This difference has been
coordinated with Learjet.
Interim Action
We consider this AD interim action. Learjet Inc. is currently
developing a new modification of the ballscrew assembly of the flap
actuator that will address the unsafe condition identified in this AD.
Once this modification is developed, approved, and available, we might
consider additional rulemaking.
FAA's Justification and Determination of the Effective Date
We have received reports of cracked and missing ballscrew assembly
sleeves of the flap actuators. Cracked and missing sleeves could result
in the loss of the load-carrying ball bearings from the assembly,
resulting in the loss of the flap drive load path for that actuator.
Loss of the sleeves on both actuators on one flap could result in flap
asymmetry, resulting in loss of control of the airplane. Because of our
requirement to promote safe flight of civil aircraft and thus the
critical need to ensure structural integrity of the ballscrew assembly
sleeves of the flap actuator and the short compliance time involved
with this action, this AD must be issued immediately.
Because an unsafe condition exists that requires the immediate
adoption of this AD, we find that notice and opportunity for prior
public comment hereon are impracticable and that good cause exists for
making this amendment effective in less than 30 days.
Comments Invited
This AD is a final rule that involves requirements affecting flight
safety, and we did not provide you with notice and an opportunity to
provide your comments before it becomes effective. However, we invite
you to send any written data, views, or arguments about this AD. Send
your comments to an address listed under the ADDRESSES section. Include
``Docket No. FAA-2010-0226; Directorate Identifier 2010-NM-034-AD'' at
the beginning of your comments. We specifically invite comments on the
overall regulatory, economic, environmental, and energy aspects of this
AD. We will consider all comments received by the closing date and may
amend this 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 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.
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
[[Page 12669]]
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), 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.
You can find our regulatory evaluation and the estimated costs of
compliance in the AD Docket.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
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 AD:
2010-06-13 Learjet Inc.: Amendment 39-16238. Docket No. FAA-2010-
0226; Directorate Identifier 2010-NM-034-AD.
Effective Date
(a) This airworthiness directive (AD) is effective April 1,
2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Learjet Inc. Model 45 airplanes,
certificated in any category, serial numbers 45-005 through 45-380
inclusive and 45-2001 through 45-2111 inclusive.
Subject
(d) Air Transport Association (ATA) of America Code 27: Flight
Controls.
Unsafe Condition
(e) This AD results from reports of cracked and missing
ballscrew assembly sleeves of the flap actuators. The Federal
Aviation Administration is issuing this AD to detect and correct
cracked and missing sleeves, which could cause loss of the load-
carrying ball bearings on both actuators on one flap, resulting in
flap asymmetry and loss of control of the airplane.
Compliance
(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.
General Visual Inspection
(g) Within 15 days after the effective date of this AD, do a
general visual inspection for cracked or missing ballscrew assembly
sleeves of the flap actuator, in accordance with the Accomplishment
Instructions of Bombardier (Learjet) Alert Service Bulletin A45-27-
40 (for Model 45 airplanes, serial numbers 45-005 through 45-380);
or Bombardier (Learjet) Alert Service Bulletin A40-27-24 (for Model
45 airplanes, serial numbers 45-2001 through 45-2111); both dated
January 11, 2010. Thereafter, do the actions in paragraph (h) or
(i), as applicable, of this AD.
Note 1: For the purposes of this AD, a general visual inspection
is: ``A visual examination of an interior or exterior area,
installation, or assembly to detect obvious damage, failure, or
irregularity. This level of inspection is made from within touching
distance unless otherwise specified. A mirror may be necessary to
ensure visual access to all surfaces in the inspection area. This
level of inspection is made under normally available lighting
conditions such as daylight, hangar lighting, flashlight, or
droplight and may require removal or opening of access panels or
doors. Stands, ladders, or platforms may be required to gain
proximity to the area being checked.''
Non-Destructive Liquid Penetrant Inspection (Sleeve Is Present and Not
Cracked Along Its Entire Length)
(h) During the general visual inspection required by paragraph
(g) of this AD, if the sleeve is present and not cracked along its
entire length, before further flight after accomplishing the general
visual inspection, do a non-destructive liquid penetrant inspection
to detect cracking of the flap actuators, in accordance with
Accomplishment Instructions of Bombardier (Learjet) Alert Service
Bulletin A45-27-40, or Bombardier (Learjet) Alert Service Bulletin
A40-27-24, both dated January 11, 2010.
(1) If no crack is found during the non-destructive liquid
penetrant inspection, repeat the inspection thereafter at intervals
not to exceed 6 months.
(2) If any crack is found during the non-destructive liquid
penetrant inspection, before further flight, modify the flap
actuator, in accordance with the Accomplishment Instructions of
Bombardier (Learjet) Optional Service Bulletin 45-27-41 (for Model
45 airplanes, serial numbers 45-005 through 45-380); or Bombardier
(Learjet) Optional Service Bulletin 40-27-25 (for Model 45
airplanes, serial numbers 45-2001 through 45-2111); both dated
January 11, 2010. Repeat the non-destructive liquid penetrant
inspection of the half (modified) sleeve thereafter at intervals not
to exceed 6 months. If any crack is found in any half (modified)
sleeve, before further flight, replace the sleeve with a new half
sleeve, in accordance with the Accomplishment Instructions of
Bombardier (Learjet) Optional Service Bulletin 45-27-41, or
Bombardier (Learjet) Optional Service Bulletin 40-27-25, both dated
January 11, 2010, and repeat the non-destructive liquid penetrant
inspection of the half sleeve thereafter at intervals not to exceed
6 months.
Replacement (Sleeve Is Missing or Cracked Along Its Entire Length)
(i) During the general visual inspection required by paragraph
(g) of this AD, if the sleeve is missing or cracked along its entire
length, before further flight after accomplishing the general visual
inspection, replace the actuator with a new or serviceable actuator,
in accordance with the Accomplishment Instructions of Bombardier
(Learjet) Alert Service Bulletin A45-27-40, or Bombardier (Learjet)
Alert Service Bulletin A40-27-24, both dated January 11, 2010.
Within 6 months after any actuator replacement required by paragraph
(i) of this AD: Do a non-destructive liquid penetrant inspection to
detect cracking of the actuator, in accordance with Accomplishment
Instructions of Bombardier (Learjet) Alert Service Bulletin A45-27-
40, or Bombardier (Learjet) Alert Service Bulletin A40-27-24, both
dated January 11, 2010.
(1) If no crack is found during the non-destructive liquid
penetrant inspection, repeat the inspection thereafter at intervals
not to exceed 6 months.
(2) If any crack is found during the non-destructive liquid
penetrant inspection, but the sleeve is not cracked along its entire
length, before further flight, modify the flap actuator, in
accordance with the Accomplishment Instructions of Bombardier
(Learjet) Optional Service Bulletin 45-27-41, or Bombardier
(Learjet) Optional Service Bulletin 40-27-25, both dated January 11,
2010. Repeat the non-destructive liquid penetrant inspection of the
half (modified) sleeves thereafter at intervals not to exceed 6
months. If any crack is found in any half (modified) sleeve, before
further flight, replace the sleeve with a new half sleeve, in
accordance with the Accomplishment Instructions of Bombardier
(Learjet) Optional Service Bulletin 45-27-41, or Bombardier
(Learjet) Optional Service Bulletin 40-27-25, both dated January 11,
2010. Repeat the non-destructive liquid penetrant inspection of the
half sleeve thereafter at intervals not to exceed 6 months.
(3) If the sleeve is cracked along its entire length, before
further flight, replace the actuator with a new or serviceable
actuator, in accordance with the Accomplishment Instructions of
Bombardier (Learjet) Optional
[[Page 12670]]
Service Bulletin 45-27-41, or Bombardier (Learjet) Optional Service
Bulletin 40-27-25, both dated January 11, 2010, and repeat the non-
destructive liquid penetrant inspection of the sleeve thereafter at
intervals not to exceed 6 months.
Note 2: Guidance on modification of the flap actuator can be
found in Microtecnica Service Bulletin 27-0018, dated November 24,
2009.
Parts Installation
(j) As of the effective date of this AD, no person may install,
on any airplane, a ballscrew assembly sleeve of the flap actuator,
unless the actuator has been modified according to Bombardier
(Learjet) Optional Service Bulletin 45-27-41, or Bombardier
(Learjet) Optional Service Bulletin 40-27-25, both dated January 11,
2010.
Reporting Requirement
(k) Submit a one-time report of the findings of the general
visual inspection and the initial non-destructive liquid penetrant
inspection required by this AD to Chris Broadrick, Bombardier
Aerospace, Project Coordinator--Fielding Specialist, Customer
Support Engineering, One Learjet Way, P.O. Box 7707, Wichita, Kansas
67209; telephone 316-946-2315; fax 316-946-8908; e-mail
chris.broadrick@aero.bombardier.com; at the applicable time
specified in paragraph (k)(1) or (k)(2) of this AD. The report must
include airplane serial number, flap actuator part number, flap
actuator serial number, and flap actuator time in service (in
hours). Under the provisions of the Paperwork Reduction Act (44
U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has
approved the information collection requirements contained in this
AD and has assigned OMB Control Number 2120-0056.
(1) If the inspection was done on or after the effective date of
this AD: Submit the report within 10 days after the inspection.
(2) If the inspection was done before the effective date of this
AD: Submit the report within 10 days after the effective date of
this AD.
Special Flight Permits
(l) Special flight permits may be issued in accordance with
sections 21.197 and 21.199 of the Federal Aviation Regulations (14
CFR 21.197 and 21.199) to operate the airplane to a location where
the airplane can be modified, unless cracks are discovered in both
an inboard and outboard actuator sleeve for any flap.
Alternative Methods of Compliance (AMOCs)
(m)(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. Send information to
ATTN: William Griffith, Aerospace Engineer, Airframe Branch, ACE-
118W, FAA, Wichita ACO, 1801 Airport Road, Room 100, Mid-Continent
Airport, Wichita, Kansas 67209; telephone (316) 946-4116; fax (316)
946-4107.
(2) To request a different method of compliance or a different
compliance time for this AD, follow the procedures in 14 CFR 39.19.
Before using any approved AMOC on any airplane to which the AMOC
applies, notify your principal maintenance inspector (PMI) or
principal avionics inspector (PAI), as appropriate, or lacking a
principal inspector, your local Flight Standards District Office.
The AMOC approval letter must specifically reference this AD.
Material Incorporated by Reference
(n) You must use the service information included in Table 1 of
this AD, as applicable, to do the actions required by this AD,
unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(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; e-mail
ac.ict@aero.bombardier.com; Internet https://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: https://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
Table 1--Material Incorporated by Reference
------------------------------------------------------------------------
Document Date
------------------------------------------------------------------------
Bombardier (Learjet) Alert Service January 11, 2010.
Bulletin A40-27-24.
Bombardier (Learjet) Alert Service January 11, 2010.
Bulletin A45-27-40.
Bombardier (Learjet) Optional Service January 11, 2010.
Bulletin 40-27-25.
Bombardier (Learjet) Optional Service January 11, 2010.
Bulletin 45-27-41.
------------------------------------------------------------------------
Issued in Renton, Washington, on March 9, 2010.
Jeffrey E. Duven,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-5669 Filed 3-16-10; 8:45 am]
BILLING CODE 4910-13-P
