Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes, 16289-16291 [E7-6267]
Download as PDF
Federal Register / Vol. 72, No. 64 / Wednesday, April 4, 2007 / Proposed Rules
scavenge valve, and scavenge pump of the
center wing fuel tank, in accordance with the
Accomplishment Instructions of Boeing Alert
Service Bulletin DC8–28A089, dated
November 1, 2006.
Alternative Methods of Compliance
(AMOCs)
(g)(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.
Issued in Renton, Washington, on March
26, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–6269 Filed 4–3–07; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2007–27755; Directorate
Identifier 2006–NM–289–AD]
RIN 2120–AA64
Airworthiness Directives; Bombardier
Model DHC–8–400 Series Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
cprice-sewell on PROD1PC61 with PROPOSALS
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for
certain Bombardier Model DHC–8–400
series airplanes. This proposed AD
would require revising the Limitations
section of the airplane flight manual to
include procedures for pulling the
‘‘HYD PWR XFER’’ circuit breaker in the
event of the loss of all hydraulic fluid
in the No. 1 or No. 2 hydraulic system.
This proposed AD results from reports
of fluid loss in the No. 2 hydraulic
system, causing the power transfer unit
to overspeed, increasing the fluid flow
within the No. 1 hydraulic system. We
are proposing this AD to prevent
possible loss of both the No. 1 and No.
2 hydraulic systems, resulting in the
potential loss of several functions
essential for safe flight and landing of
the airplane.
DATES: We must receive comments on
this proposed AD by May 4, 2007.
VerDate Aug<31>2005
15:41 Apr 03, 2007
Jkt 211001
Use one of the following
addresses to submit comments on this
proposed AD.
• DOT Docket Web site: Go to
https://dms.dot.gov and follow the
instructions for sending your comments
electronically.
• Government-wide rulemaking Web
site: Go to https://www.regulations.gov
and follow the instructions for sending
your comments electronically.
• Mail: Docket Management Facility,
U.S. Department of Transportation, 400
Seventh Street, SW., Nassif Building,
Room PL–401, Washington, DC 20590.
• Fax: (202) 493–2251.
• Hand Delivery: Room PL–401 on
the plaza level of the Nassif Building,
400 Seventh Street, SW., Washington,
DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
Contact Bombardier, Inc., Bombardier
Regional Aircraft Division, 123 Garratt
Boulevard, Downsview, Ontario M3K
1Y5, Canada, for service information
identified in this proposed AD.
FOR FURTHER INFORMATION CONTACT: Ezra
Sasson, Aerospace Engineer, Systems
and Flight Test Branch, ANE–172, FAA,
New York Aircraft Certification Office,
1600 Stewart Avenue, Suite 410,
Westbury, New York 11590; telephone
(516) 228–7320; fax (516) 794–5531.
SUPPLEMENTARY INFORMATION:
ADDRESSES:
Comments Invited
We invite you to submit any relevant
written data, views, or arguments
regarding this proposed AD. Send your
comments to an address listed in the
ADDRESSES section. Include the docket
number ‘‘FAA–2007–27755; Directorate
Identifier 2006–NM–289–AD’’ at the
beginning of your comments. We
specifically invite comments on the
overall regulatory, economic,
environmental, and energy aspects of
the proposed AD. We will consider all
comments received by the closing date
and may amend the proposed AD in
light of those comments.
We will post all comments we
receive, without change, to https://
dms.dot.gov, including any personal
information you provide. We will also
post a report summarizing each
substantive verbal contact with FAA
personnel concerning this proposed AD.
Using the search function of that web
site, anyone can find and read the
comments in any of our dockets,
including the name of the individual
who sent the comment (or signed the
comment on behalf of an association,
business, labor union, etc.). You may
review the DOT’s complete Privacy Act
Statement in the Federal Register
PO 00000
Frm 00003
Fmt 4702
Sfmt 4702
16289
published on April 11, 2000 (65 FR
19477–78), or you may visit https://
dms.dot.gov.
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 DOT
street address stated in the ADDRESSES
section. Comments will be available in
the AD docket shortly after the Docket
Management System receives them.
Discussion
Transport Canada Civil Aviation
(TCCA), which is the airworthiness
authority for Canada, notified us that an
unsafe condition may exist on certain
Bombardier Model DHC–8–400 series
airplanes. TCCA advises that it has
received several reports of fluid loss in
the No. 2 hydraulic system, causing the
power transfer unit (PTU) to overspeed.
This resulted in pressure fluctuations
and increased fluid flow within the No.
1 hydraulic system. In one case, the
hydraulic system control logic did not
shut down the PTU, and the overspeed
condition persisted, resulting in the
illumination of the No. 1 ‘‘HYD FLUID
HOT’’ caution light. This caution light
indicated that the hydraulic fluid
temperature had exceeded 225 degrees
Fahrenheit. Had the temperature of the
hydraulic fluid continued to increase to
275 degrees Fahrenheit, the No. 1
system hydraulic firewall shutoff would
have closed, leaving only the standby
power unit (SPU) available. The SPU is
not capable of meeting the increased
flow demands of the PTU and other No.
1 hydraulic system services. Therefore,
the No. 1 hydraulic system would have
also been lost, leaving only the No. 3
hydraulic system available. Inoperative
systems would include flaps, brakes and
emergency brakes, nose wheel steering,
and all primary flight controls other
than elevator control and degraded
aileron control.
This condition, if not corrected, could
result in the potential loss of several
functions essential for safe flight and
landing of the airplane.
Relevant Service Information
Bombardier has issued the following
airplane flight manual (AFM) temporary
amendments:
E:\FR\FM\04APP1.SGM
04APP1
16290
Federal Register / Vol. 72, No. 64 / Wednesday, April 4, 2007 / Proposed Rules
TABLE.—AFM TEMPORARY AMENDMENTS
Bombardier
temporary
amendment—
For model—
–400 airplanes .............................................
–401 airplanes .............................................
–402 airplanes .............................................
13
13
13
The temporary amendments describe
procedures for pulling the ‘‘HYD PWR
XFER’’ circuit breaker in the event of
the loss of all hydraulic fluid in the No.
1 or No. 2 hydraulic system. TCCA
mandated the service information and
issued Canadian airworthiness directive
CF–2006–08, dated April 26, 2006, to
ensure the continued airworthiness of
these airplanes in Canada.
FAA’s Determination and Requirements
of the Proposed AD
These airplanes are manufactured in
Canada and are type certificated for
operation in the United States under the
provisions of section 21.29 of the
Dated—
Issue—
1
1
1
To Bombardier
Dash 8 Q400 airplane flight manual—
July 14, 2005 ..............................................
July 14, 2005 ..............................................
July 14, 2005 ..............................................
PSM 1–84–1A
PSM 1–84–1A
PSM 1–84–1A
Federal Aviation Regulations (14 CFR
21.29) and the applicable bilateral
airworthiness agreement. Pursuant to
this bilateral airworthiness agreement,
TCCA has kept the FAA informed of the
situation described above. We have
examined TCCA’s findings, evaluated
all pertinent information, and
determined that we need to issue an AD
for airplanes of this type design that are
certificated for operation in the United
States. Therefore, we are proposing this
AD, which would require revising the
Limitations section of the AFM to
include procedures for pulling the
‘‘HYD PWR XFER’’ circuit breaker in the
event of the loss of all hydraulic fluid
in the No. 1 or No. 2 hydraulic system.
Interim Action
We consider this proposed AD
interim action. The manufacturer is
currently developing a modification that
will address the unsafe condition
identified in this proposed AD. Once
this modification is developed,
approved, and available, we might
consider additional rulemaking.
Costs of Compliance
The following table provides the
estimated costs for U.S. operators to
comply with this proposed AD.
ESTIMATED COSTS
Work hours
Average
labor rate
per hour
Parts
Cost per
airplane
Number
of U.S.registered
airplanes
Fleet cost
AFM revision ....................................................................
cprice-sewell on PROD1PC61 with PROPOSALS
Action
1
$80
$0
$80
21
$1,680
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
proposed AD would not have federalism
implications under Executive Order
13132. This proposed AD would not
VerDate Aug<31>2005
15:41 Apr 03, 2007
Jkt 211001
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 the proposed regulation:
1. Is not a ‘‘significant regulatory
action’’ under Executive Order 12866;
2. Is not a ‘‘significant rule’’ under the
DOT Regulatory Policies and Procedures
(44 FR 11034, February 26, 1979); and
3. Will not have a significant
economic impact, positive or negative,
on a substantial number of small entities
under the criteria of the Regulatory
Flexibility Act.
We prepared a regulatory evaluation
of the estimated costs to comply with
this proposed AD and placed it in the
AD docket. 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, Safety.
PO 00000
Frm 00004
Fmt 4702
Sfmt 4702
The Proposed Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA proposes to amend 14 CFR part
39 as follows:
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The Federal Aviation
Administration (FAA) amends § 39.13
by adding the following new
airworthiness directive (AD):
Bombardier, Inc. (Formerly de Havilland,
Inc.): Docket No. FAA–2007–27755;
Directorate Identifier 2006–NM–289–AD.
Comments Due Date
(a) The FAA must receive comments on
this AD action by May 4, 2007.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier Model
DHC–8–400, DHC–8–401, and DHC–8–402
E:\FR\FM\04APP1.SGM
04APP1
Federal Register / Vol. 72, No. 64 / Wednesday, April 4, 2007 / Proposed Rules
airplanes, certificated in any category; serial
numbers 4001 and 4003 and subsequent.
potential loss of several functions essential
for safe flight and landing of the airplane.
Unsafe Condition
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.
(d) This AD results from reports of fluid
loss in the No. 2 hydraulic system, causing
the power transfer unit to overspeed,
increasing the fluid flow within the No. 1
hydraulic system. We are issuing this AD to
prevent possible loss of both the No. 1 and
No. 2 hydraulic systems, resulting in the
Airplane Flight Manual (AFM) Revision
(f) Within 14 days after the effective date
of this AD, revise the Limitations section of
16291
the applicable AFM to include the
information in the applicable Bombardier
temporary amendment specified in Table 1 of
this AD, as specified in the temporary
amendment. These temporary amendments
introduce procedures for pulling the ‘‘HYD
PWR XFER’’ circuit breaker in the event of
the loss of all hydraulic fluid in the No. 1 or
No. 2 hydraulic system. Operate the airplane
according to the limitations and procedures
in the applicable temporary amendment.
TABLE 1.—AFM TEMPORARY AMENDMENTS
Use Bombardier Temporary Amendment—
For Model—
–400 airplanes .............................................
–401 airplanes .............................................
–402 airplanes .............................................
Dated—
Issue—
13
13
13
1
1
1
To Bombardier
Dash 8 Q400 Airplane Flight Manual—
July 14, 2005 ..............................................
July 14, 2005 ..............................................
July 14, 2005 ..............................................
PSM 1–84–1A.
PSM 1–84–1A.
PSM 1–84–1A.
Note 1: This may be done by inserting a
copy of the applicable temporary amendment
into the applicable AFM. When the
applicable temporary amendment has been
included in general revisions of the AFM, the
general revisions may be inserted into the
AFM, provided the relevant information in
the general revisions is identical to that in
the temporary amendment.
DEPARTMENT OF HEALTH AND
HUMAN SERVICES
Alternative Methods of Compliance
(AMOCs)
Irradiation in the Production,
Processing and Handling of Food
(g)(1) The Manager, New York 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.
AGENCY:
Related Information
(h) Canadian airworthiness directive CF–
2006–08, dated April 26, 2006, also addresses
the subject of this AD.
Issued in Renton, Washington, on March
26, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E7–6267 Filed 4–3–07; 8:45 am]
cprice-sewell on PROD1PC61 with PROPOSALS
BILLING CODE 4910–13–P
VerDate Aug<31>2005
15:41 Apr 03, 2007
Jkt 211001
Food and Drug Administration
21 CFR Part 179
[Docket No. 2005N–0272]
RIN 0910–ZA29
Food and Drug Administration,
HHS.
ACTION:
Proposed rule.
SUMMARY: The Food and Drug
Administration (FDA) is proposing to
revise its labeling regulations applicable
to foods (including dietary
supplements) for which irradiation has
been approved by FDA. FDA is
proposing that only those irradiated
foods in which the irradiation causes a
material change in the food, or a
material change in the consequences
that may result from the use of the food,
bear the radura logo and the term
‘‘irradiated,’’ or a derivative thereof, in
conjunction with explicit language
describing the change in the food or its
conditions of use. For purposes of this
rulemaking, we are using the term
‘‘material change’’ to refer to a change
in the organoleptic, nutritional, or
functional properties of a food, caused
by irradiation, that the consumer could
not identify at the point of purchase in
the absence of appropriate labeling.
FDA is also proposing to allow a firm to
petition FDA for use of an alternate term
to ‘‘irradiation’’ (other than
‘‘pasteurized’’). In addition, FDA is
proposing to permit a firm to use the
term ‘‘pasteurized’’ in lieu of
‘‘irradiated,’’ provided it notifies the
PO 00000
Frm 00005
Fmt 4702
Sfmt 4702
agency that the irradiation process being
used meets the criteria specified for use
of the term ‘‘pasteurized’’ in the Federal
Food, Drug, and Cosmetic Act (the act)
and the agency does not object to the
notification. This proposed action is in
response to the Farm Security and Rural
Investment Act of 2002 (FSRIA) and, if
finalized, will provide consumers with
more useful information than the
current regulation.
DATES: Submit written or electronic
comments on the proposed rule by July
3, 2007. Submit comments regarding
information collection by May 4, 2007
to OMB (see ADDRESSES).
ADDRESSES: You may submit comments,
identified by Docket No. 2005N–0272 by
any of the following methods:
Electronic Submissions
Submit electronic comments in the
following ways:
• Federal eRulemaking Portal: https://
www.regulations.gov. Follow the
instructions for submitting comments.
• Agency Web site: https://
www.fda.gov/dockets/ecomments.
Follow the instructions for submitting
comments on the agency Web site.
Written Submissions
Submit written submissions in the
following ways:
• FAX: 301–827–6870.
• Mail/Hand delivery/Courier [For
paper, disk, or CD–ROM submissions]:
Division of Dockets Management (HFA–
305), Food and Drug Administration,
5630 Fishers Lane, rm. 1061, Rockville,
MD 20852.
To ensure more timely processing of
comments, FDA is no longer accepting
comments submitted to the agency by email. FDA encourages you to continue
to submit electronic comments by using
the Federal eRulemaking Portal or the
agency Web site, as described in the
E:\FR\FM\04APP1.SGM
04APP1
Agencies
[Federal Register Volume 72, Number 64 (Wednesday, April 4, 2007)]
[Proposed Rules]
[Pages 16289-16291]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-6267]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2007-27755; Directorate Identifier 2006-NM-289-AD]
RIN 2120-AA64
Airworthiness Directives; Bombardier Model DHC-8-400 Series
Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Bombardier Model DHC-8-400 series airplanes. This proposed
AD would require revising the Limitations section of the airplane
flight manual to include procedures for pulling the ``HYD PWR XFER''
circuit breaker in the event of the loss of all hydraulic fluid in the
No. 1 or No. 2 hydraulic system. This proposed AD results from reports
of fluid loss in the No. 2 hydraulic system, causing the power transfer
unit to overspeed, increasing the fluid flow within the No. 1 hydraulic
system. We are proposing this AD to prevent possible loss of both the
No. 1 and No. 2 hydraulic systems, resulting in the potential loss of
several functions essential for safe flight and landing of the
airplane.
DATES: We must receive comments on this proposed AD by May 4, 2007.
ADDRESSES: Use one of the following addresses to submit comments on
this proposed AD.
DOT Docket Web site: Go to https://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to https://
www.regulations.gov and follow the instructions for sending your
comments electronically.
Mail: Docket Management Facility, U.S. Department of
Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401,
Washington, DC 20590.
Fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building, 400 Seventh Street, SW., Washington, DC, between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Contact Bombardier, Inc., Bombardier Regional Aircraft Division,
123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, for service
information identified in this proposed AD.
FOR FURTHER INFORMATION CONTACT: Ezra Sasson, Aerospace Engineer,
Systems and Flight Test Branch, ANE-172, FAA, New York Aircraft
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New
York 11590; telephone (516) 228-7320; fax (516) 794-5531.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to submit any relevant written data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed in the ADDRESSES section. Include the docket number ``FAA-2007-
27755; Directorate Identifier 2006-NM-289-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the proposed AD. We will
consider all comments received by the closing date and may amend the
proposed AD in light of those comments.
We will post all comments we receive, without change, to https://
dms.dot.gov, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this proposed AD. Using the search function of
that web site, anyone can find and read the comments in any of our
dockets, including the name of the individual who sent the comment (or
signed the comment on behalf of an association, business, labor union,
etc.). You may review the DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78), or you
may visit https://dms.dot.gov.
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 DOT
street address stated in the ADDRESSES section. Comments will be
available in the AD docket shortly after the Docket Management System
receives them.
Discussion
Transport Canada Civil Aviation (TCCA), which is the airworthiness
authority for Canada, notified us that an unsafe condition may exist on
certain Bombardier Model DHC-8-400 series airplanes. TCCA advises that
it has received several reports of fluid loss in the No. 2 hydraulic
system, causing the power transfer unit (PTU) to overspeed. This
resulted in pressure fluctuations and increased fluid flow within the
No. 1 hydraulic system. In one case, the hydraulic system control logic
did not shut down the PTU, and the overspeed condition persisted,
resulting in the illumination of the No. 1 ``HYD FLUID HOT'' caution
light. This caution light indicated that the hydraulic fluid
temperature had exceeded 225 degrees Fahrenheit. Had the temperature of
the hydraulic fluid continued to increase to 275 degrees Fahrenheit,
the No. 1 system hydraulic firewall shutoff would have closed, leaving
only the standby power unit (SPU) available. The SPU is not capable of
meeting the increased flow demands of the PTU and other No. 1 hydraulic
system services. Therefore, the No. 1 hydraulic system would have also
been lost, leaving only the No. 3 hydraulic system available.
Inoperative systems would include flaps, brakes and emergency brakes,
nose wheel steering, and all primary flight controls other than
elevator control and degraded aileron control.
This condition, if not corrected, could result in the potential
loss of several functions essential for safe flight and landing of the
airplane.
Relevant Service Information
Bombardier has issued the following airplane flight manual (AFM)
temporary amendments:
[[Page 16290]]
Table.--AFM Temporary Amendments
----------------------------------------------------------------------------------------------------------------
Bombardier
For model-- temporary Issue-- Dated-- To Bombardier Dash 8 Q400
amendment-- airplane flight manual--
----------------------------------------------------------------------------------------------------------------
-400 airplanes.................. 13 1 July 14, 2005..... PSM 1-84-1A
-401 airplanes.................. 13 1 July 14, 2005..... PSM 1-84-1A
-402 airplanes.................. 13 1 July 14, 2005..... PSM 1-84-1A
----------------------------------------------------------------------------------------------------------------
The temporary amendments describe procedures for pulling the ``HYD PWR
XFER'' circuit breaker in the event of the loss of all hydraulic fluid
in the No. 1 or No. 2 hydraulic system. TCCA mandated the service
information and issued Canadian airworthiness directive CF-2006-08,
dated April 26, 2006, to ensure the continued airworthiness of these
airplanes in Canada.
FAA's Determination and Requirements of the Proposed AD
These airplanes are manufactured in Canada and are type
certificated for operation in the United States under the provisions of
section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and
the applicable bilateral airworthiness agreement. Pursuant to this
bilateral airworthiness agreement, TCCA has kept the FAA informed of
the situation described above. We have examined TCCA's findings,
evaluated all pertinent information, and determined that we need to
issue an AD for airplanes of this type design that are certificated for
operation in the United States. Therefore, we are proposing this AD,
which would require revising the Limitations section of the AFM to
include procedures for pulling the ``HYD PWR XFER'' circuit breaker in
the event of the loss of all hydraulic fluid in the No. 1 or No. 2
hydraulic system.
Interim Action
We consider this proposed AD interim action. The manufacturer is
currently developing a modification that will address the unsafe
condition identified in this proposed AD. Once this modification is
developed, approved, and available, we might consider additional
rulemaking.
Costs of Compliance
The following table provides the estimated costs for U.S. operators
to comply with this proposed AD.
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Number of
Average Cost per U.S.-
Action Work hours labor rate Parts airplane registered Fleet cost
per hour airplanes
----------------------------------------------------------------------------------------------------------------
AFM revision................ 1 $80 $0 $80 21 $1,680
----------------------------------------------------------------------------------------------------------------
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 proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that the proposed
regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
2. Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979); and
3. Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
We prepared a regulatory evaluation of the estimated costs to
comply with this proposed AD and placed it in the AD docket. 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, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The Federal Aviation Administration (FAA) amends Sec. 39.13 by
adding the following new airworthiness directive (AD):
Bombardier, Inc. (Formerly de Havilland, Inc.): Docket No. FAA-2007-
27755; Directorate Identifier 2006-NM-289-AD.
Comments Due Date
(a) The FAA must receive comments on this AD action by May 4,
2007.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier Model DHC-8-400, DHC-8-401,
and DHC-8-402
[[Page 16291]]
airplanes, certificated in any category; serial numbers 4001 and
4003 and subsequent.
Unsafe Condition
(d) This AD results from reports of fluid loss in the No. 2
hydraulic system, causing the power transfer unit to overspeed,
increasing the fluid flow within the No. 1 hydraulic system. We are
issuing this AD to prevent possible loss of both the No. 1 and No. 2
hydraulic systems, resulting in the potential loss of several
functions essential for safe flight and landing of the airplane.
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.
Airplane Flight Manual (AFM) Revision
(f) Within 14 days after the effective date of this AD, revise
the Limitations section of the applicable AFM to include the
information in the applicable Bombardier temporary amendment
specified in Table 1 of this AD, as specified in the temporary
amendment. These temporary amendments introduce procedures for
pulling the ``HYD PWR XFER'' circuit breaker in the event of the
loss of all hydraulic fluid in the No. 1 or No. 2 hydraulic system.
Operate the airplane according to the limitations and procedures in
the applicable temporary amendment.
Table 1.--AFM Temporary Amendments
----------------------------------------------------------------------------------------------------------------
Use Bombardier
Temporary To Bombardier Dash 8 Q400
For Model-- Amendment-- Issue-- Dated-- Airplane Flight Manual--
----------------------------------------------------------------------------------------------------------------
-400 airplanes.................. 13 1 July 14, 2005..... PSM 1-84-1A.
-401 airplanes.................. 13 1 July 14, 2005..... PSM 1-84-1A.
-402 airplanes.................. 13 1 July 14, 2005..... PSM 1-84-1A.
----------------------------------------------------------------------------------------------------------------
Note 1: This may be done by inserting a copy of the applicable
temporary amendment into the applicable AFM. When the applicable
temporary amendment has been included in general revisions of the
AFM, the general revisions may be inserted into the AFM, provided
the relevant information in the general revisions is identical to
that in the temporary amendment.
Alternative Methods of Compliance (AMOCs)
(g)(1) The Manager, New York 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 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.
Related Information
(h) Canadian airworthiness directive CF-2006-08, dated April 26,
2006, also addresses the subject of this AD.
Issued in Renton, Washington, on March 26, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E7-6267 Filed 4-3-07; 8:45 am]
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