Airworthiness Directives; Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes, 7568-7572 [E7-2640]
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7568
Federal Register / Vol. 72, No. 32 / Friday, February 16, 2007 / Rules and Regulations
Control Module Replacement
DEPARTMENT OF TRANSPORTATION
(f) Within 60 months after the effective
date of this AD, replace the control modules
of the fire detection systems of the
propulsion engines with new, improved
control modules, in accordance with
paragraph 2., ‘‘Main Engine Control Module
Replacement Instructions,’’ of Meggitt Safety
Systems Service Bulletin 26–34, Revision 2,
dated August 15, 2006.
Credit for Previous Revisions of Service
Bulletins
(g) Actions done before the effective date
of this AD in accordance with Meggitt Safety
Systems Service Bulletin 26–34, Revision 1,
dated July 17, 2006, are acceptable for
compliance with the corresponding actions
required by paragraph (f) of this AD.
Alternative Methods of Compliance
(AMOCs)
(h)(1) The Manager, Los Angeles Aircraft
Certification Office, FAA, has the authority to
approve AMOCs for this AD, if requested in
accordance with the procedures found in 14
CFR 39.19.
(2) Before using any AMOC approved in
accordance with § 39.19 on any airplane to
which the AMOC applies, notify the
appropriate principal inspector in the FAA
Flight Standards Certificate Holding District
Office.
Material Incorporated by Reference
(i) You must use Meggitt Safety Systems
Service Bulletin 26–34, Revision 2, dated
August 15, 2006, to perform the actions that
are required by this AD, unless the AD
specifies otherwise. Meggitt Safety Systems
Service Bulletin 26–34, Revision 2, dated
August 15, 2006, contains the following
effective pages:
Page
number
Revision
level
shown on
page
1–26 ......
27–61 ....
2
1
Date shown on page
August 15, 2006.
July 17, 2006.
rmajette on PROD1PC67 with RULES
The Director of the Federal Register
approved the incorporation by reference of
this document in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. Contact Meggitt
Safety Systems, 1915 Voyager Avenue, Simi
Valley, California 93063, for a copy of this
service information. You may review copies
at the FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton,
Washington; 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/
cfr/ibr-locations.html.
Issued in Renton, Washington, on February
8, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–2639 Filed 2–15–07; 8:45 am]
BILLING CODE 4910–13–P
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Jkt 211001
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2006–25563; Directorate
Identifier 2006–NM–083–AD; Amendment
39–14950; AD 2007–04–18]
RIN 2120–AA64
Airworthiness Directives; Learjet
Model 23, 24, 24A, 24B, 24B–A, 24C,
24D, 24D–A, 24E, 24F, 24F–A, 25, 25A,
25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35,
35A (C–21A), 36, 36A, 55, 55B, and 55C
Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
AGENCY:
The FAA is adopting a new
airworthiness directive (AD) for certain
Learjet Model 23, 24, 24A, 24B, 24B–A,
24C, 24D, 24D–A, 24E, 24F, 24F–A, 25,
25A, 25B, 25C, 25D, 25F, 28, 29, 31,
31A, 35, 35A (C–21A), 36, 36A, 55, 55B,
and 55C airplanes. This AD requires
modifying the left- and right-hand
standby fuel pump switches. This AD
also requires revising the Emergency
and Abnormal Procedures sections of
the airplane flight manual to advise the
flightcrew of the proper procedures to
follow in the event of failure of the
standby fuel pump to shut off. This AD
results from a report of inadvertent
operation of a standby fuel pump due to
an electrical system malfunction. We are
issuing this AD to prevent this
inadvertent operation, which could
result in inadvertent fuel transfer by the
left or right wing fuel system and
subsequent over-limit fuel imbalance
between the left and right wing fuel
loads. This imbalance could affect
lateral control of the airplane which
could result in reduced controllability.
DATES: This AD becomes effective
March 23, 2007.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in the AD
as of March 23, 2007.
ADDRESSES: You may examine the AD
docket on the Internet at https://
dms.dot.gov or in person at the Docket
Management Facility, U.S. Department
of Transportation, 400 Seventh Street,
SW., Nassif Building, Room PL–401,
Washington, DC.
Contact Learjet, Inc., One Learjet Way,
Wichita, Kansas 67209–2942, for service
information identified in this AD.
FOR FURTHER INFORMATION CONTACT:
James Galstad, Aerospace Engineer,
Mechanical Systems and Propulsion
SUMMARY:
PO 00000
Frm 00022
Fmt 4700
Sfmt 4700
Branch, ACE–116W, FAA, Wichita
Aircraft Certification Office, 1801
Airport Road, Room 100, Mid-Continent
Airport, Wichita, Kansas 67209;
telephone (316) 946–4135; fax (316)
946–4107.
SUPPLEMENTARY INFORMATION:
Examining the Docket
You may examine the airworthiness
directive (AD) docket on the Internet at
https://dms.dot.gov or in person at the
Docket Management Facility office
between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
The Docket Management Facility office
(telephone (800) 647–5227) is located on
the plaza level of the Nassif Building at
the street address stated in the
ADDRESSES section.
Discussion
The FAA issued a notice of proposed
rulemaking (NPRM) to amend 14 CFR
part 39 to include an AD that would
apply to certain Learjet Model 23, 24,
24A, 24B, 24B–A, 24C, 24D, 24D–A,
24E, 24F, 24F–A, 25, 25A, 25B, 25C,
25D, 25F, 28, 29, 31, 31A, 35, 35A (C–
21A), 36, 36A, 55, 55B, and 55C
airplanes. That NPRM was published in
the Federal Register on August 16, 2006
(71 FR 47154). That NPRM proposed to
require modifying the left- and righthand standby fuel pump switches. That
NPRM also proposed to require revising
the Emergency and Abnormal
Procedures sections of the airplane
flight manual (AFM) to advise the
flightcrew of the proper procedures to
follow in the event of failure of the
standby fuel pump to shut off.
Comments
We provided the public the
opportunity to participate in the
development of this AD. We have
considered the comments received.
Requests To Withdraw the NPRM
One private citizen states that the
flight department he works for operates
three Learjet Model 35A airplanes and
a Learjet Model 31 airplane. He adds
that the airplanes have never had an
inadvertent operation of the fuel pumps
resulting in an over-limit fuel
imbalance. He also notes that the fuel
crossflow valve must be open in order
to transfer fuel; this requires two
switches to be selected—the standby
fuel pump and the crossflow valve. He
states that even if a standby fuel pump
is inadvertently activated, no fuel will
be transferred unless the crossflow valve
is also open. He concludes that there is
already enough protection in the system
to avoid an over-limit fuel imbalance.
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Federal Register / Vol. 72, No. 32 / Friday, February 16, 2007 / Rules and Regulations
We infer that the commenter is stating
that an AD is not required. We recognize
that the crossflow valve must be open
for fuel to be transferred; however, as
the operation of the pump may not be
recognized by the flightcrew, the
transfer valve may be opened in an
attempt to correct an existing fuel
imbalance, creating an even greater
imbalance. We do not agree that there is
enough protection in the system to
avoid an over-limit fuel imbalance when
an electrical malfunction provides
power to an electric standby pump. This
condition was found during an accident
investigation. We have made no change
to the AD in this regard.
Another private citizen states that his
organization has operated up to 13
Learjet 20 series airplanes (some with
20,000 total airframe hours) for almost
20 years and has never encountered the
unsafe condition. He adds that if this
problem were to occur, it should not
generate an emergency situation but
simply an abnormal procedure that is
addressed by the aircraft checklist. He
asks what pertinent information leads to
the conclusion that an unsafe condition
is likely to exist or develop on other
airplanes. He adds that the condition of
imbalance caused by inadvertent
standby pump operation, as specified in
the NPRM, is not likely to occur; if it
did occur, the flightcrew could read the
proper procedure in the checklist. He
concludes that safety is not jeopardized
at all.
We infer that the commenter wants us
to withdraw the NPRM; we do not agree
with the request. We acknowledge that
existing airplane checklist procedures
appear to be adequate, but using
previous AFM procedures does not
ensure that the imbalance will be
corrected. Based on the data presented
to date of over 30 reports of imbalance,
we find that this AD is warranted. We
have made no change to the AD in this
regard.
Request To Publish Service
Information/Incorporate by Reference
in NPRM
The Modification and Replacement
Parts Association (MARPA) states that
ADs are based on service information
that originates from the type certificate
holder or its suppliers. MARPA adds
that manufacturer’s service documents
are privately authored instruments,
generally having copyright protection
against duplication and distribution.
When a service document is
incorporated by reference into a public
document, such as an AD, pursuant to
5 U.S.C. 552(a) and 1 CFR part 51, it
loses its private, protected status and
becomes a public document. MARPA
notes that if a service document is used
as a mandatory element of compliance,
it should not simply be referenced, but
should be incorporated by reference.
MARPA believes that public laws, by
definition, should be public, which
means they cannot rely upon private
writings for compliance. MARPA adds
that the legal interpretation of a
document is a question of law, not of
fact; therefore, unless the service
document is incorporated by reference it
cannot be considered. MARPA is
concerned that failure to incorporate
essential service information could
result in a court decision invalidating
the AD.
MARPA also states that service
documents incorporated by reference
should be made available to the public
by publication in the Docket
Management System (DMS), keyed to
the action that incorporates those
documents. MARPA notes that the
stated purpose of the incorporation by
reference method is brevity, to keep
from expanding the Federal Register
needlessly by publishing documents
already in the hands of the affected
individuals. MARPA adds that,
traditionally, ‘‘affected individuals’’
means aircraft owners and operators,
who are generally provided service
information by the manufacturer.
MARPA adds that a new class of
affected individuals has emerged, since
the majority of aircraft maintenance is
now performed by specialty shops
instead of aircraft owners and operators.
MARPA notes that this new class
includes maintenance and repair
organizations, component servicing,
and/or servicing alternatively certified
parts under section 21.303
(‘‘Replacement and modification parts’’)
of the Federal Aviation Regulations (14
CFR 21.303). MARPA notes that
distribution to owners may, when the
owner is a financing or leasing
institution, not actually reach the
people responsible for accomplishing
the AD. Therefore, MARPA asks that the
service documents deemed essential to
the accomplishment of the NPRM be
incorporated by reference into the
regulatory instrument and published in
DMS.
We acknowledge MARPA’s
comments. The Office of the Federal
Register (OFR) requires that documents
that are necessary to accomplish the
requirements of the AD be incorporated
by reference during the final rule phase
of rulemaking. This final rule
incorporates by reference the documents
necessary for the accomplishment of the
requirements mandated by this AD.
Further, we point out that while
documents that are incorporated by
reference do become public information,
as noted by the commenter, they do not
lose their copyright protection. For that
reason, we advise the public to contact
the manufacturer to obtain copies of the
referenced service information.
In regard to MARPA’s request to post
service bulletins on the Department of
Transportation’s DMS, we are currently
in the process of reviewing issues
surrounding the posting of service
bulletins on the DMS as part of an AD
docket. Once we have thoroughly
examined all aspects of this issue and
have made a final determination, we
will consider whether our current
practice needs to be revised. No change
to the AD is necessary in response to
these comments.
Conclusion
We have carefully reviewed the
available data, including the comments
received, and determined that air safety
and the public interest require adopting
the AD as proposed.
Costs of Compliance
There are about 1,613 airplanes of the
affected design in the worldwide fleet.
The following table provides the
estimated costs for U.S. operators to
comply with this AD, at an average
labor rate of $80 per work hour,
depending on airplane configuration.
ESTIMATED COSTS
rmajette on PROD1PC67 with RULES
Action
Work hours
Parts
Cost per airplane
Modification ...................
Between 4 and 12 .......
AFM Revision ...............
1 ..................................
Between $1,426 and
$1,470.
None ............................
Number of
U.S.-registered
airplanes
Between $1,746 and
$2,430.
$80 ..............................
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14:54 Feb 15, 2007
Jkt 211001
PO 00000
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E:\FR\FM\16FER1.SGM
1,150
1,150
16FER1
Fleet cost
Between $2,007,900
and $2,794,500.
$92,000
7570
Federal Register / Vol. 72, No. 32 / Friday, February 16, 2007 / 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.
Regulatory Findings
We have determined that this AD will
not have federalism implications under
Executive Order 13132. This AD will
not have a substantial direct effect on
the States, on the relationship between
the national government and the States,
or on the distribution of power and
responsibilities among the various
levels of government.
For the reasons discussed above, I
certify that this AD:
(1) Is not a ‘‘significant regulatory
action’’ under Executive Order 12866;
(2) 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.
We prepared a regulatory evaluation
of the estimated costs to comply with
this AD and placed it in the AD docket.
See the ADDRESSES section for a location
to examine the regulatory evaluation.
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,
I
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:
I
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
by adding the following new
airworthiness directive (AD):
I
2007–04–18 Learjet: Amendment 39–14950.
Docket No. FAA–2006–25563;
Directorate Identifier 2006–NM–083–AD.
Effective Date
(a) This AD becomes effective March 23,
2007.
Affected ADs
(b) None.
Applicability
(c) This AD applies to the Learjet models
identified in the applicable Bombardier
service bulletin listed in Table 1 of this AD.
TABLE 1.—APPLICABILITY BY SERVICE BULLETIN
Bombardier service
bulletin
Revision
level
Date
Learjet model(s)
SB 23–28–6 ...............
SB 24/25–28–3 ..........
Original ........
2 ..................
April 21, 1998 ............
February 21, 1998 .....
SB
SB
SB
SB
3
3
4
3
June 2, 1999 .............
January 26, 2001 ......
December 4, 2000 .....
December 15, 2000 ..
23.
24, 24A, 24B, 24B–A, 24C, 24D, 24D–A, 24E, 24F, and 24F–A airplanes; and
25, 25A, 25B, 25C, 25D, and 25F airplanes.
28 and 29 airplanes.
31 and 31A airplanes.
35 and 35A (C–21A) airplanes; 36 and 36A airplanes.
55, 55B and 55C airplanes.
28/29–28–4 ..........
31–28–7 ...............
35/36–28–11 ........
55–28–13 .............
..................
..................
..................
..................
Unsafe Condition
(d) This AD results from a report of
inadvertent operation of a standby fuel pump
due to an electrical system malfunction. We
are issuing this AD to prevent this
inadvertent operation, which could result in
inadvertent fuel transfer by the left or right
wing fuel system and subsequent over-limit
fuel imbalance between the left and right
wing fuel loads. This imbalance could affect
lateral control of the airplane which could
result in reduced controllability.
rmajette on PROD1PC67 with RULES
Compliance
(e) You are responsible for having the
actions required by this AD performed within
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14:54 Feb 15, 2007
Jkt 211001
the compliance times specified, unless the
actions have already been done.
Modification
(f) Within 24 months after the effective
date of this AD: Modify the left- and righthand standby fuel pump switches, in
accordance with the Accomplishment
Instructions of the applicable service bulletin
identified in Table 1 of this AD.
Airplane Flight Manual (AFM) Revision
(g) Before further flight after accomplishing
the modification required by paragraph (f) of
this AD: Revise the Emergency and Abnormal
Procedures sections of the applicable Learjet
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Fmt 4700
Sfmt 4700
AFM to advise the flightcrew of proper
procedures to follow in the event of failure
of the standby fuel pump to shut off by
including the information in the applicable
Learjet temporary flight manual (TFM)
changes identified in Table 2 of this AD. This
may be done by inserting a copy of the TFM
changes into the AFM. When the TFM
changes have been included in the general
revisions of the AFM, those general revisions
may be inserted into the AFM, provided the
relevant information in the general revisions
is identical to that in the TFM changes.
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7571
Federal Register / Vol. 72, No. 32 / Friday, February 16, 2007 / Rules and Regulations
TABLE 2.—TFM CHANGES
Learjet model(s)
Learjet TFM
change
Date
To the Learjet AFM
24, 25, 28, 29, 31, 35, 36, and 55
airplanes.
TFM 96–08 .......
May 30, 1996 ...
24, 25, 28, 29, 31, 35, 36, and 55
airplanes.
TFM 96–09 .......
May 30, 1996 ...
23 airplanes ....................................
23 airplanes ....................................
TFM 98–01 .......
TFM 98–02 .......
May 11, 1999 ...
May 11, 1999 ...
24 (FM–004), 24B (FM–006), 24D (FM–009), 24E (FM–011), 24F
(FM–012), 24 ECR 736 (FM–008), 25 (FM–014), 25B/C (FM–016),
25D/F (FM–018), 28/29 (FM–100), 31 (FM–112), 31A (FM–121),
35/36 (FM–019), 35A/36A FC–200 (FM–102), 35A/36A FC–530
(FM–108), 55 (FM–103), 55B (FM–110), 55C (FM–114).
24 (FM–004), 24B (FM–006), 24D (FM–009), 24E (FM–011), 24F
(FM–012), 24 ECR 736 (FM–008), 25 (FM–014), 25B/C (FM–016),
25D/F (FM–018), 28/29 (FM–100), 31 (FM–112), 31A (FM–121),
35/36 (FM–019), 35A/36A FC–200 (FM–102), 35A/36A FC–530
(FM–108), 55 (FM–103), 55B (FM–110), 55C (FM–114).
23 (FM–003).
23 (FM–003).
Alternative Methods of Compliance
(AMOCs)
(h)(1) The Manager, Wichita Aircraft
Certification Office (ACO), FAA, has the
authority to approve AMOCs for this AD, if
requested in accordance with the procedures
found in 14 CFR 39.19.
(2) Before using any AMOC approved in
accordance with § 39.19 on any airplane to
which the AMOC applies, notify the
appropriate principal inspector in the FAA
Flight Standards Certificate Holding District
Office.
Material Incorporated by Reference
(i) You must use the applicable service
information identified in Tables 3 and 4 of
this AD to perform the actions that are
required by this AD, unless the AD specifies
otherwise. (Only page 1 of Learjet Temporary
Flight Manual Change TFM 96–08, dated
May 30, 1996; and Learjet Temporary Flight
Manual Change TFM 96–09, dated May 30,
1996; contain the document date, no other
pages of the document contain this
information.) The Director of the Federal
Register approved the incorporation by
reference of these documents in accordance
with 5 U.S.C. 552(a) and 1 CFR part 51.
Contact Learjet, Inc., One Learjet Way,
Wichita, Kansas 67209–2942, for a copy of
this service information. You may review
copies at the Docket Management Facility,
U.S. Department of Transportation, 400
Seventh Street SW., Room PL–401, Nassif
Building, Washington, DC; on the Internet at
https://dms.dot.gov; or at the National
Archives and Records Administration
(NARA). For information on the availability
of this material at the NARA, call (202) 741–
6030, or go to https://www.archives.gov/
federal_register/code_of_federal_regulations/
ibr_locations.html.
TABLE 3.—SERVICE BULLETINS INCORPORATED BY REFERENCE
Bombardier service bulletin
SB
SB
SB
SB
SB
SB
Revision level
23–28–6 ..........................................................................
24/25–28–3 .....................................................................
28/29–28–4 .....................................................................
31–28–7 ..........................................................................
35/36–28–11 ...................................................................
55–28–13 ........................................................................
Date
Original Issue .......................................................................
2 ...........................................................................................
3 ...........................................................................................
3 ...........................................................................................
4 ...........................................................................................
3 ...........................................................................................
April 21, 1998.
February 21, 1998.
June 2, 1999.
January 26, 2001.
December 4, 2000.
December 15, 2000.
TABLE 4.—TEMPORARY CHANGES INCORPORATED BY REFERENCE
Date
To the Learjet Airplane Flight Manual
TFM 96–08 ......................................
May 30, 1996 .................................
TFM 96–09 ......................................
May 30, 1996 .................................
TFM 98–01 ......................................
TFM 98–02 ......................................
rmajette on PROD1PC67 with RULES
Learjet Temporary Flight Manual
(TFM) change
May 11, 1999 .................................
May 11, 1999 .................................
24 (FM–004), 24B (FM–006), 24D (FM–009), 24E (FM–011), 24F
(FM–012), 24 ECR 736 (FM–008), 25 (FM–014), 25B/C (FM–016),
25D/F (FM–018), 28/29 (FM–100), 31 (FM–112), 31A (FM–121),
35/36 (FM–019), 35A/36A FC–200 (FM–102), 35A/36A FC–530
(FM–108), 55 (FM–103), 55B (FM–110), 55C (FM–114)
24 (FM–004), 24B (FM–006), 24D (FM–009), 24E (FM–011), 24F
(FM–012), 24 ECR 736 (FM–008), 25 (FM–014), 25B/C (FM–016),
25D/F (FM–018), 28/29 (FM–100), 31 (FM–112), 31A (FM–121),
35/36 (FM–019), 35A/36A FC–200 (FM–102), 35A/36A FC–530
(FM–108), 55 (FM–103), 55B (FM–110), 55C (FM–114)
23 (FM–003)
23 (FM–003)
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7572
Federal Register / Vol. 72, No. 32 / Friday, February 16, 2007 / Rules and Regulations
Issued in Renton, Washington, on February
6, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–2640 Filed 2–15–07; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2005–20351; Directorate
Identifier 2003–NM–269–AD; Amendment
39–14948; AD 2007–04–16]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 767 Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
AGENCY:
SUMMARY: The FAA is adopting a new
airworthiness directive (AD) for all
Boeing Model 767 airplanes. This AD
requires an inspection of each main tank
fuel boost pump for the presence of a
pump shaft flame arrestor, and if the
flame arrestor is missing, replacement of
that pump with a pump having a pump
shaft flame arrestor. This AD also
requires repetitive measurements of the
flame arrestor’s position in the pump,
and corrective actions if necessary. This
AD also requires the replacement of the
pump with a new or modified pump,
which ends the repetitive
measurements. This AD results from
reports that certain fuel boost pumps
may not have flame arrestors installed
in the pump shaft and reports that the
pin that holds the flame arrestor in
place can break due to metal fatigue. We
are issuing this AD to prevent the
possible migration of a flame from a
main tank fuel boost pump inlet to the
vapor space of that fuel tank, and
consequent ignition of fuel vapors,
which could result in a fire or
explosion.
This AD becomes effective
March 23, 2007.
The Director of the Federal Register
approved the incorporation by reference
of certain publications listed in the AD
as of March 23, 2007.
ADDRESSES: You may examine the AD
docket on the Internet at https://
dms.dot.gov or in person at the Docket
Management Facility, U.S. Department
of Transportation, 400 Seventh Street,
SW., Nassif Building, Room PL–401,
Washington, DC.
rmajette on PROD1PC67 with RULES
DATES:
VerDate Aug<31>2005
14:54 Feb 15, 2007
Jkt 211001
Contact Boeing Commercial
Airplanes, P.O. Box 3707, Seattle,
Washington 98124–2207, for service
information identified in this AD.
FOR FURTHER INFORMATION CONTACT:
Judith Coyle, Aerospace Engineer,
Propulsion Branch, ANM–140S, FAA,
Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton,
Washington 98057–3356; telephone
(425) 917–6497; fax (425) 917–6590.
SUPPLEMENTARY INFORMATION:
Examining the Docket
You may examine the AD docket on
the Internet at https://dms.dot.gov or in
person at the Docket Management
Facility office between 9 a.m. and 5
p.m., Monday through Friday, except
Federal holidays. The Docket
Management Facility office (telephone
(800) 647–5227) is located on the plaza
level of the Nassif Building at the street
address stated in the ADDRESSES section.
Discussion
The FAA issued a supplemental
notice of proposed rulemaking (NPRM)
to amend 14 CFR part 39 to include an
AD that would apply to all Boeing
Model 767 airplanes. That supplemental
NPRM was published in the Federal
Register on July 6, 2006 (71 FR 38304).
That supplemental NPRM proposed to
require an inspection of each main tank
fuel boost pump for the presence of a
pump shaft flame arrestor, and if the
flame arrestor is missing, replacement of
that pump with a pump having a pump
shaft flame arrestor. That supplemental
NPRM also proposed to require
repetitive measurements of the flame
arrestor’s position in the pump, and
corrective actions if necessary. That
supplemental NPRM also proposed to
require the replacement of the pump
with a new or modified pump, which
ends the repetitive measurements.
Comments
We provided the public the
opportunity to participate in the
development of this AD. We have
considered the comments received.
Request for Clarification of
Replacement Requirement
The Air Transport Association (ATA)
of America, on behalf of one of its
member operators, Delta Air Lines,
requests that we explain why we
propose to require replacing the pump
shaft without including the option of
replacing the shaft pin or periodically
inspecting the pin. Delta states that
replacing the entire shaft would be at a
considerable cost and that a more costeffective solution would be to develop
a pin replacement repair.
PO 00000
Frm 00026
Fmt 4700
Sfmt 4700
We acknowledge that it may be
possible to develop a more cost-effective
solution than the replacement specified
in this AD. However, the manufacturer
has developed only a single design
solution (replacement of the pump
shaft) to fully address the identified
unsafe condition specified in this AD.
We have mandated this terminating
action because we can better ensure
long-term continued operational safety
by design changes to remove the source
of the problem, rather than by repetitive
inspections. We also recognize that
alternative methods of compliance
(AMOCs) that meet the intent of this AD
may also exist; operators may request an
AMOC in accordance with the
procedures specified in paragraph (l) of
this AD. We have not revised this AD
in this regard.
Request To Remove Terminating Action
Requirement
Delta Air Lines requests that we do
not mandate the terminating action
specified in paragraph (i) of the
supplemental NPRM that would require
replacing the pump within 36 months.
Delta Air Lines states that if the 6,000flight-hour or 24-month repetitive
interval specified in paragraphs (f) and
(g) of the supplemental NPRM provide
an acceptable level of safety, then the
repetitive interval should be adequate
until an operator can schedule the
terminating action specified in
paragraph (i) of the supplemental
NPRM, if desired.
We do not agree to remove the
requirement to do the terminating action
specified in paragraph (i) of this AD. We
can better ensure long-term continued
operational safety by modifications or
design changes to remove the source of
the problem, rather than by repetitive
inspections/testing. Long-term
inspections/testing may not provide the
degree of safety necessary for the
transport airplane fleet. This, coupled
with a better understanding of the
human factors associated with
numerous repetitive inspections, has led
us to consider placing less emphasis on
special procedures and more emphasis
on design improvements.
We developed the 36-month
compliance time for the replacement in
accordance with manufacturer
recommendations and we considered
the urgency associated with the subject
unsafe condition, the availability of
required parts, and the practical aspect
of accomplishing the required
modification within a period of time
that corresponds to the normal
scheduled maintenance for most
affected operators. However, according
to the procedures specified in paragraph
E:\FR\FM\16FER1.SGM
16FER1
]]>Agencies
[Federal Register Volume 72, Number 32 (Friday, February 16, 2007)]
[Rules and Regulations]
[Pages 7568-7572]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-2640]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2006-25563; Directorate Identifier 2006-NM-083-AD;
Amendment 39-14950; AD 2007-04-18]
RIN 2120-AA64
Airworthiness Directives; Learjet Model 23, 24, 24A, 24B, 24B-A,
24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29,
31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
-----------------------------------------------------------------------
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Learjet Model 23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E,
24F, 24F-A, 25, 25A, 25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-
21A), 36, 36A, 55, 55B, and 55C airplanes. This AD requires modifying
the left- and right-hand standby fuel pump switches. This AD also
requires revising the Emergency and Abnormal Procedures sections of the
airplane flight manual to advise the flightcrew of the proper
procedures to follow in the event of failure of the standby fuel pump
to shut off. This AD results from a report of inadvertent operation of
a standby fuel pump due to an electrical system malfunction. We are
issuing this AD to prevent this inadvertent operation, which could
result in inadvertent fuel transfer by the left or right wing fuel
system and subsequent over-limit fuel imbalance between the left and
right wing fuel loads. This imbalance could affect lateral control of
the airplane which could result in reduced controllability.
DATES: This AD becomes effective March 23, 2007.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in the AD as of March 23,
2007.
ADDRESSES: You may examine the AD docket on the Internet at https://
dms.dot.gov or in person at the Docket Management Facility, U.S.
Department of Transportation, 400 Seventh Street, SW., Nassif Building,
Room PL-401, Washington, DC.
Contact Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942,
for service information identified in this AD.
FOR FURTHER INFORMATION CONTACT: James Galstad, Aerospace Engineer,
Mechanical Systems and Propulsion Branch, ACE-116W, FAA, Wichita
Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-
Continent Airport, Wichita, Kansas 67209; telephone (316) 946-4135; fax
(316) 946-4107.
SUPPLEMENTARY INFORMATION:
Examining the Docket
You may examine the airworthiness directive (AD) docket on the
Internet at https://dms.dot.gov or in person at the Docket Management
Facility office between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The Docket Management Facility office
(telephone (800) 647-5227) is located on the plaza level of the Nassif
Building at the street address stated in the ADDRESSES section.
Discussion
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to include an AD that would apply to certain Learjet Model
23, 24, 24A, 24B, 24B-A, 24C, 24D, 24D-A, 24E, 24F, 24F-A, 25, 25A,
25B, 25C, 25D, 25F, 28, 29, 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B,
and 55C airplanes. That NPRM was published in the Federal Register on
August 16, 2006 (71 FR 47154). That NPRM proposed to require modifying
the left- and right-hand standby fuel pump switches. That NPRM also
proposed to require revising the Emergency and Abnormal Procedures
sections of the airplane flight manual (AFM) to advise the flightcrew
of the proper procedures to follow in the event of failure of the
standby fuel pump to shut off.
Comments
We provided the public the opportunity to participate in the
development of this AD. We have considered the comments received.
Requests To Withdraw the NPRM
One private citizen states that the flight department he works for
operates three Learjet Model 35A airplanes and a Learjet Model 31
airplane. He adds that the airplanes have never had an inadvertent
operation of the fuel pumps resulting in an over-limit fuel imbalance.
He also notes that the fuel crossflow valve must be open in order to
transfer fuel; this requires two switches to be selected--the standby
fuel pump and the crossflow valve. He states that even if a standby
fuel pump is inadvertently activated, no fuel will be transferred
unless the crossflow valve is also open. He concludes that there is
already enough protection in the system to avoid an over-limit fuel
imbalance.
[[Page 7569]]
We infer that the commenter is stating that an AD is not required.
We recognize that the crossflow valve must be open for fuel to be
transferred; however, as the operation of the pump may not be
recognized by the flightcrew, the transfer valve may be opened in an
attempt to correct an existing fuel imbalance, creating an even greater
imbalance. We do not agree that there is enough protection in the
system to avoid an over-limit fuel imbalance when an electrical
malfunction provides power to an electric standby pump. This condition
was found during an accident investigation. We have made no change to
the AD in this regard.
Another private citizen states that his organization has operated
up to 13 Learjet 20 series airplanes (some with 20,000 total airframe
hours) for almost 20 years and has never encountered the unsafe
condition. He adds that if this problem were to occur, it should not
generate an emergency situation but simply an abnormal procedure that
is addressed by the aircraft checklist. He asks what pertinent
information leads to the conclusion that an unsafe condition is likely
to exist or develop on other airplanes. He adds that the condition of
imbalance caused by inadvertent standby pump operation, as specified in
the NPRM, is not likely to occur; if it did occur, the flightcrew could
read the proper procedure in the checklist. He concludes that safety is
not jeopardized at all.
We infer that the commenter wants us to withdraw the NPRM; we do
not agree with the request. We acknowledge that existing airplane
checklist procedures appear to be adequate, but using previous AFM
procedures does not ensure that the imbalance will be corrected. Based
on the data presented to date of over 30 reports of imbalance, we find
that this AD is warranted. We have made no change to the AD in this
regard.
Request To Publish Service Information/Incorporate by Reference in NPRM
The Modification and Replacement Parts Association (MARPA) states
that ADs are based on service information that originates from the type
certificate holder or its suppliers. MARPA adds that manufacturer's
service documents are privately authored instruments, generally having
copyright protection against duplication and distribution. When a
service document is incorporated by reference into a public document,
such as an AD, pursuant to 5 U.S.C. 552(a) and 1 CFR part 51, it loses
its private, protected status and becomes a public document. MARPA
notes that if a service document is used as a mandatory element of
compliance, it should not simply be referenced, but should be
incorporated by reference. MARPA believes that public laws, by
definition, should be public, which means they cannot rely upon private
writings for compliance. MARPA adds that the legal interpretation of a
document is a question of law, not of fact; therefore, unless the
service document is incorporated by reference it cannot be considered.
MARPA is concerned that failure to incorporate essential service
information could result in a court decision invalidating the AD.
MARPA also states that service documents incorporated by reference
should be made available to the public by publication in the Docket
Management System (DMS), keyed to the action that incorporates those
documents. MARPA notes that the stated purpose of the incorporation by
reference method is brevity, to keep from expanding the Federal
Register needlessly by publishing documents already in the hands of the
affected individuals. MARPA adds that, traditionally, ``affected
individuals'' means aircraft owners and operators, who are generally
provided service information by the manufacturer. MARPA adds that a new
class of affected individuals has emerged, since the majority of
aircraft maintenance is now performed by specialty shops instead of
aircraft owners and operators. MARPA notes that this new class includes
maintenance and repair organizations, component servicing, and/or
servicing alternatively certified parts under section 21.303
(``Replacement and modification parts'') of the Federal Aviation
Regulations (14 CFR 21.303). MARPA notes that distribution to owners
may, when the owner is a financing or leasing institution, not actually
reach the people responsible for accomplishing the AD. Therefore, MARPA
asks that the service documents deemed essential to the accomplishment
of the NPRM be incorporated by reference into the regulatory instrument
and published in DMS.
We acknowledge MARPA's comments. The Office of the Federal Register
(OFR) requires that documents that are necessary to accomplish the
requirements of the AD be incorporated by reference during the final
rule phase of rulemaking. This final rule incorporates by reference the
documents necessary for the accomplishment of the requirements mandated
by this AD. Further, we point out that while documents that are
incorporated by reference do become public information, as noted by the
commenter, they do not lose their copyright protection. For that
reason, we advise the public to contact the manufacturer to obtain
copies of the referenced service information.
In regard to MARPA's request to post service bulletins on the
Department of Transportation's DMS, we are currently in the process of
reviewing issues surrounding the posting of service bulletins on the
DMS as part of an AD docket. Once we have thoroughly examined all
aspects of this issue and have made a final determination, we will
consider whether our current practice needs to be revised. No change to
the AD is necessary in response to these comments.
Conclusion
We have carefully reviewed the available data, including the
comments received, and determined that air safety and the public
interest require adopting the AD as proposed.
Costs of Compliance
There are about 1,613 airplanes of the affected design in the
worldwide fleet. The following table provides the estimated costs for
U.S. operators to comply with this AD, at an average labor rate of $80
per work hour, depending on airplane configuration.
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Number of U.S.-
Action Work hours Parts Cost per registered Fleet cost
airplane airplanes
----------------------------------------------------------------------------------------------------------------
Modification................ Between 4 and Between $1,426 Between $1,746 1,150 Between
12. and $1,470. and $2,430. $2,007,900 and
$2,794,500.
AFM Revision................ 1.............. None........... $80............ 1,150 $92,000
----------------------------------------------------------------------------------------------------------------
[[Page 7570]]
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 have determined that this AD will not have federalism
implications under Executive Order 13132. This AD will not have a
substantial direct effect on the States, on the relationship between
the national government and the States, or on the distribution of power
and responsibilities among the various levels of government.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866;
(2) 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.
We prepared a regulatory evaluation of the estimated costs to
comply with this AD and placed it in the AD docket. See the ADDRESSES
section for a location to examine the regulatory evaluation.
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 Federal Aviation Administration (FAA) amends Sec. 39.13 by
adding the following new airworthiness directive (AD):
2007-04-18 Learjet: Amendment 39-14950. Docket No. FAA-2006-25563;
Directorate Identifier 2006-NM-083-AD.
Effective Date
(a) This AD becomes effective March 23, 2007.
Affected ADs
(b) None.
Applicability
(c) This AD applies to the Learjet models identified in the
applicable Bombardier service bulletin listed in Table 1 of this AD.
Table 1.--Applicability by Service Bulletin
----------------------------------------------------------------------------------------------------------------
Bombardier service bulletin Revision level Date Learjet model(s)
----------------------------------------------------------------------------------------------------------------
SB 23-28-6...................... Original.............. April 21, 1998.................. 23.
SB 24/25-28-3................... 2..................... February 21, 1998............... 24, 24A, 24B, 24B-A,
24C, 24D, 24D-A,
24E, 24F, and 24F-A
airplanes; and 25,
25A, 25B, 25C, 25D,
and 25F airplanes.
SB 28/29-28-4................... 3..................... June 2, 1999.................... 28 and 29 airplanes.
SB 31-28-7...................... 3..................... January 26, 2001................ 31 and 31A
airplanes.
SB 35/36-28-11.................. 4..................... December 4, 2000................ 35 and 35A (C-21A)
airplanes; 36 and
36A airplanes.
SB 55-28-13..................... 3..................... December 15, 2000............... 55, 55B and 55C
airplanes.
----------------------------------------------------------------------------------------------------------------
Unsafe Condition
(d) This AD results from a report of inadvertent operation of a
standby fuel pump due to an electrical system malfunction. We are
issuing this AD to prevent this inadvertent operation, which could
result in inadvertent fuel transfer by the left or right wing fuel
system and subsequent over-limit fuel imbalance between the left and
right wing fuel loads. This imbalance could affect lateral control
of the airplane which could result in reduced controllability.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Modification
(f) Within 24 months after the effective date of this AD: Modify
the left- and right-hand standby fuel pump switches, in accordance
with the Accomplishment Instructions of the applicable service
bulletin identified in Table 1 of this AD.
Airplane Flight Manual (AFM) Revision
(g) Before further flight after accomplishing the modification
required by paragraph (f) of this AD: Revise the Emergency and
Abnormal Procedures sections of the applicable Learjet AFM to advise
the flightcrew of proper procedures to follow in the event of
failure of the standby fuel pump to shut off by including the
information in the applicable Learjet temporary flight manual (TFM)
changes identified in Table 2 of this AD. This may be done by
inserting a copy of the TFM changes into the AFM. When the TFM
changes have been included in the general revisions of the AFM,
those general revisions may be inserted into the AFM, provided the
relevant information in the general revisions is identical to that
in the TFM changes.
[[Page 7571]]
Table 2.--TFM Changes
----------------------------------------------------------------------------------------------------------------
Learjet model(s) Learjet TFM change Date To the Learjet AFM
----------------------------------------------------------------------------------------------------------------
24, 25, 28, 29, 31, 35, 36, TFM 96-08............ May 30, 1996......... 24 (FM-004), 24B (FM-006), 24D (FM-
and 55 airplanes. 009), 24E (FM-011), 24F (FM-012),
24 ECR 736 (FM-008), 25 (FM-014),
25B/C (FM-016), 25D/F (FM-018),
28/29 (FM-100), 31 (FM-112), 31A
(FM-121), 35/36 (FM-019), 35A/36A
FC-200 (FM-102), 35A/36A FC-530
(FM-108), 55 (FM-103), 55B (FM-
110), 55C (FM-114).
24, 25, 28, 29, 31, 35, 36, TFM 96-09............ May 30, 1996......... 24 (FM-004), 24B (FM-006), 24D (FM-
and 55 airplanes. 009), 24E (FM-011), 24F (FM-012),
24 ECR 736 (FM-008), 25 (FM-014),
25B/C (FM-016), 25D/F (FM-018),
28/29 (FM-100), 31 (FM-112), 31A
(FM-121), 35/36 (FM-019), 35A/36A
FC-200 (FM-102), 35A/36A FC-530
(FM-108), 55 (FM-103), 55B (FM-
110), 55C (FM-114).
23 airplanes.................. TFM 98-01............ May 11, 1999......... 23 (FM-003).
23 airplanes.................. TFM 98-02............ May 11, 1999......... 23 (FM-003).
----------------------------------------------------------------------------------------------------------------
Alternative Methods of Compliance (AMOCs)
(h)(1) The Manager, Wichita Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested in
accordance with the procedures found in 14 CFR 39.19.
(2) Before using any AMOC approved in accordance with Sec.
39.19 on any airplane to which the AMOC applies, notify the
appropriate principal inspector in the FAA Flight Standards
Certificate Holding District Office.
Material Incorporated by Reference
(i) You must use the applicable service information identified
in Tables 3 and 4 of this AD to perform the actions that are
required by this AD, unless the AD specifies otherwise. (Only page 1
of Learjet Temporary Flight Manual Change TFM 96-08, dated May 30,
1996; and Learjet Temporary Flight Manual Change TFM 96-09, dated
May 30, 1996; contain the document date, no other pages of the
document contain this information.) The Director of the Federal
Register approved the incorporation by reference of these documents
in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact
Learjet, Inc., One Learjet Way, Wichita, Kansas 67209-2942, for a
copy of this service information. You may review copies at the
Docket Management Facility, U.S. Department of Transportation, 400
Seventh Street SW., Room PL-401, Nassif Building, Washington, DC; on
the Internet at https://dms.dot.gov; or at the National Archives and
Records Administration (NARA). For information on the availability
of this material at the NARA, call (202) 741-6030, or go to https://
www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html.
Table 3.--Service Bulletins Incorporated by Reference
----------------------------------------------------------------------------------------------------------------
Bombardier service bulletin Revision level Date
----------------------------------------------------------------------------------------------------------------
SB 23-28-6............................... Original Issue.............. April 21, 1998.
SB 24/25-28-3............................ 2........................... February 21, 1998.
SB 28/29-28-4............................ 3........................... June 2, 1999.
SB 31-28-7............................... 3........................... January 26, 2001.
SB 35/36-28-11........................... 4........................... December 4, 2000.
SB 55-28-13.............................. 3........................... December 15, 2000.
----------------------------------------------------------------------------------------------------------------
Table 4.--Temporary Changes Incorporated by Reference
------------------------------------------------------------------------
To the Learjet
Learjet Temporary Flight Date Airplane Flight
Manual (TFM) change Manual
------------------------------------------------------------------------
TFM 96-08..................... May 30, 1996..... 24 (FM-004), 24B (FM-
006), 24D (FM-009),
24E (FM-011), 24F
(FM-012), 24 ECR 736
(FM-008), 25 (FM-
014), 25B/C (FM-
016), 25D/F (FM-
018), 28/29 (FM-
100), 31 (FM-112),
31A (FM-121), 35/36
(FM-019), 35A/36A FC-
200 (FM-102), 35A/
36A FC-530 (FM-108),
55 (FM-103), 55B (FM-
110), 55C (FM-114)
TFM 96-09..................... May 30, 1996..... 24 (FM-004), 24B (FM-
006), 24D (FM-009),
24E (FM-011), 24F
(FM-012), 24 ECR 736
(FM-008), 25 (FM-
014), 25B/C (FM-
016), 25D/F (FM-
018), 28/29 (FM-
100), 31 (FM-112),
31A (FM-121), 35/36
(FM-019), 35A/36A FC-
200 (FM-102), 35A/
36A FC-530 (FM-108),
55 (FM-103), 55B (FM-
110), 55C (FM-114)
TFM 98-01..................... May 11, 1999..... 23 (FM-003)
TFM 98-02..................... May 11, 1999..... 23 (FM-003)
------------------------------------------------------------------------
[[Page 7572]]
Issued in Renton, Washington, on February 6, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E7-2640 Filed 2-15-07; 8:45 am]
BILLING CODE 4910-13-P
