Airworthiness Directives; McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 Airplanes, 28626-28628 [E6-7479]
Download as PDF
28626
Federal Register / Vol. 71, No. 95 / Wednesday, May 17, 2006 / Proposed Rules
are acceptable for compliance with the
corresponding requirements of this AD.
Alternative Methods of Compliance
(AMOCs)
(j)(1) The Manager, Los Angeles 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.
Issued in Renton, Washington, on May 9,
2006.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E6–7475 Filed 5–16–06; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2006–24786; Directorate
Identifier 2006–NM–087–AD]
RIN 2120–AA64
Airworthiness Directives; McDonnell
Douglas Model DC–9–81 (MD–81), DC–
9–82 (MD–82), DC–9–83 (MD–83), DC–
9–87 (MD–87), and MD–88 Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
mstockstill on PROD1PC61 with PROPOSALS
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for
certain McDonnell Douglas Model DC–
9–81 (MD–81), DC–9–82 (MD–82), DC–
9–83 (MD–83), DC–9–87 (MD–87), and
MD–88 airplanes. This proposed AD
would require installing a clamp, a
bonding jumper assembly, and attaching
hardware to the refueling manifold in
the right wing refueling station area.
This proposed AD results from fuel
system reviews conducted by the
manufacturer. We are proposing this AD
to prevent arcing on the in-tank side of
the fueling valve during a lightning
strike, which could result in an ignition
source that could ignite fuel vapor and
cause a fuel tank explosion.
DATES: We must receive comments on
this proposed AD by July 3, 2006.
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
VerDate Aug<31>2005
15:07 May 16, 2006
Jkt 208001
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 Boeing Commercial
Airplanes, Long Beach Division, 3855
Lakewood Boulevard, Long Beach,
California 90846, Attention: Data and
Service Management, Dept. C1–L5A
(D800–0024), for the service information
identified in this proposed AD.
FOR FURTHER INFORMATION CONTACT:
William Bond, Aerospace Engineer,
Propulsion Branch, ANM–140L, FAA,
Los Angeles Aircraft Certification
Office, 3960 Paramount Boulevard,
Lakewood, California 90712–4137;
telephone (562) 627–5253; fax (562)
627–5210.
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–2006–24786; Directorate
Identifier 2006–NM–087–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 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.
PO 00000
Frm 00037
Fmt 4702
Sfmt 4702
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
The FAA has examined the
underlying safety issues involved in fuel
tank explosions on several large
transport airplanes, including the
adequacy of existing regulations, the
service history of airplanes subject to
those regulations, and existing
maintenance practices for fuel tank
systems. As a result of those findings,
we issued a regulation titled ‘‘Transport
Airplane Fuel Tank System Design
Review, Flammability Reduction and
Maintenance and Inspection
Requirements’’ (67 FR 23086, May 7,
2001). In addition to new airworthiness
standards for transport airplanes and
new maintenance requirements, this
rule included Special Federal Aviation
Regulation No. 88 (‘‘SFAR 88,’’
Amendment 21–78, and subsequent
Amendments 21–82 and 21–83).
Among other actions, SFAR 88
requires certain type design (i.e., type
certificate (TC) and supplemental type
certificate (STC)) holders to substantiate
that their fuel tank systems can prevent
ignition sources in the fuel tanks. This
requirement applies to type design
holders for large turbine-powered
transport airplanes and for subsequent
modifications to those airplanes. It
requires them to perform design reviews
and to develop design changes and
maintenance procedures if their designs
do not meet the new fuel tank safety
standards. As explained in the preamble
to the rule, we intended to adopt
airworthiness directives to mandate any
changes found necessary to address
unsafe conditions identified as a result
of these reviews.
In evaluating these design reviews, we
have established four criteria intended
to define the unsafe conditions
associated with fuel tank systems that
require corrective actions. The
percentage of operating time during
which fuel tanks are exposed to
flammable conditions is one of these
criteria. The other three criteria address
the failure types under evaluation:
single failures, single failures in
E:\FR\FM\17MYP1.SGM
17MYP1
Federal Register / Vol. 71, No. 95 / Wednesday, May 17, 2006 / Proposed Rules
combination with a latent condition(s),
and in-service failure experience. For all
four criteria, the evaluations included
consideration of previous actions taken
that may mitigate the need for further
action.
We have determined that the actions
identified in this AD are necessary to
reduce the potential of ignition sources
inside fuel tanks, which, in combination
with flammable fuel vapors, could result
in fuel tank explosions and consequent
loss of the airplane.
We have received a report indicating
that a SFAR 88 review of the fuel system
on McDonnell Douglas Model MD–80
airplanes revealed a potential for arcing
on the in-tank side of the fueling valve
during a lightning strike. The nonconductive coating, which keeps the
rigid pipes and valves electrically
isolated, may wear off or be scratched.
Any wear or scratch in the coating could
allow lightning-induced current to flow
from the refueling manifold to the
airplane structure through the fueling
valve and could cause arcing. Arcing on
the in-tank side of the fueling valve
could result in an ignition source that
could ignite fuel vapor and cause a fuel
tank explosion.
Relevant Service Information
We have reviewed Boeing Service
Bulletin MD80–28–213, dated May 16,
2005. The service bulletin describes
procedures for installing a clamp, a
bonding jumper assembly, and attaching
hardware to the refueling manifold in
the right wing refueling station area.
Accomplishing the actions specified in
the service information is intended to
adequately address the unsafe
condition.
FAA’s Determination and Requirements
of the Proposed AD
We have evaluated all pertinent
information and identified an unsafe
condition that is likely to exist or
develop on other airplanes of this same
type design. For this reason, we are
proposing this AD, which would require
accomplishing the actions specified in
the service information described
previously.
mstockstill on PROD1PC61 with PROPOSALS
Costs of Compliance
There are about 994 airplanes of the
affected design in the worldwide fleet.
This proposed AD would affect about
573 airplanes of U.S. registry. The
proposed actions would take about 2
work hours per airplane, at an average
labor rate of $80 per work hour.
Required parts would cost about $8 per
airplane. Based on these figures, the
estimated cost of the proposed AD for
VerDate Aug<31>2005
15:07 May 16, 2006
Jkt 208001
U.S. operators is $96,264, or $168 per
airplane.
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:
PO 00000
Frm 00038
Fmt 4702
Sfmt 4702
28627
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):
McDonnell Douglas: Docket No. FAA–2006–
24786; Directorate Identifier 2006–NM–
087–AD.
Comments Due Date
(a) The FAA must receive comments on
this AD action by July 3, 2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to McDonnell Douglas
Model DC–9–81 (MD–81), DC–9–82 (MD–82),
DC–9–83 (MD–83), DC–9–87 (MD–87), and
MD–88 airplanes, certificated in any
category; as identified in Boeing Service
Bulletin MD80–28–213, dated May 16, 2005.
Unsafe Condition
(d) This AD results from fuel system
reviews conducted by the manufacturer. We
are issuing this AD to prevent arcing on the
in-tank side of the fueling valve during a
lightning strike, which could result in an
ignition source that could ignite fuel vapor
and cause a fuel tank explosion.
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.
Electrical Bond Installation
(f) Within 60 months after the effective
date of this AD, install a clamp, a bonding
jumper assembly, and attaching hardware to
the refueling manifold in the right wing
refueling station area; in accordance with the
Accomplishment Instructions of Boeing
Service Bulletin MD80–28–213, dated May
16, 2005.
Alternative Methods of Compliance
(AMOCs)
(g)(1) The Manager, Los Angeles 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.
E:\FR\FM\17MYP1.SGM
17MYP1
28628
Federal Register / Vol. 71, No. 95 / Wednesday, May 17, 2006 / Proposed Rules
Issued in Renton, Washington, on May 9,
2006.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. E6–7479 Filed 5–16–06; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2006–24788; Directorate
Identifier 2006–NM–073–AD]
DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
Contact Empresa Brasileira de
Aeronautica S.A. (EMBRAER), P.O. Box
343—CEP 12.225, Sao Jose dos
Campos—SP, Brazil, for service
information identified in this proposed
AD.
FOR FURTHER INFORMATION CONTACT:
Todd Thompson, Aerospace Engineer,
International Branch, ANM–116,
Transport Airplane Directorate, FAA,
1601 Lind Avenue, SW., Renton,
Washington 98055–4056; telephone
(425) 227–1175; fax (425) 227–1149.
SUPPLEMENTARY INFORMATION:
RIN 2120–AA64
Comments Invited
Airworthiness Directives; Empresa
Brasileira de Aeronautica S.A.
(EMBRAER) Model ERJ 170 Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
mstockstill on PROD1PC61 with PROPOSALS
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for
certain EMBRAER Model ERJ 170
airplanes. This proposed AD would
require a one-time inspection for proper
crimping of the terminal lugs for the
power cables of each integrated drive
generator (IDG), installing a new sleeve
on the terminal, and re-crimping if
necessary. This proposed AD results
from a report that the terminal lugs for
the power cables of the IDGs may not be
adequately crimped, which could allow
the cables to be pulled out of the
terminals with no significant force. We
are proposing this AD to prevent loss of
all normal electrical power for the
airplane, and consequent reduced
controllability of the airplane.
DATES: We must receive comments on
this proposed AD by June 16, 2006.
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,
VerDate Aug<31>2005
15:07 May 16, 2006
Jkt 208001
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–2006–24788; Directorate
Identifier 2006–NM–073–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.
PO 00000
Frm 00039
Fmt 4702
Sfmt 4702
Discussion
The Departamento de Aviacao Civil
¸˜
(DAC), which is the airworthiness
authority for Brazil, notified us that an
unsafe condition may exist on certain
EMBRAER Model ERJ 170 airplanes.
The DAC advises that during a heavy
maintenance action, it was discovered
that four terminal lugs for the power
cables of the integrated drive generators
(IDGs) were not adequately crimped
during installation, which could allow
the cables to be pulled out of the
terminals with no significant force. This
condition, if not corrected, could result
in loss of all normal electrical power for
the airplane, and consequent reduced
controllability of the airplane.
Relevant Service Information
EMBRAER has issued Service Bulletin
170–24–0028, dated January 4, 2006.
The service bulletin describes
procedures for doing an inspection of
the crimping of terminal lugs for the
power cables of each IDG, and
corrective actions. The corrective
actions are installing a new sleeve on
the terminal, and re-crimping if
necessary. Accomplishing the actions
specified in the service information is
intended to adequately address the
unsafe condition. The DAC mandated
the service information and issued
Brazilian airworthiness directive 2006–
02–04, dated March 15, 2006, to ensure
the continued airworthiness of these
airplanes in Brazil.
FAA’s Determination and Requirements
of the Proposed AD
This airplane model is manufactured
in Brazil and is 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,
the DAC has kept the FAA informed of
the situation described above. We have
examined the DAC’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 accomplishing the
actions specified in the service
information described previously.
Clarification of Inspection Terminology
In this proposed AD, the ‘‘detailed
visual inspection’’ specified in the
Brazilian airworthiness directive is
referred to as a ‘‘detailed inspection.’’
We have included the definition for a
E:\FR\FM\17MYP1.SGM
17MYP1
Agencies
[Federal Register Volume 71, Number 95 (Wednesday, May 17, 2006)]
[Proposed Rules]
[Pages 28626-28628]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E6-7479]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2006-24786; Directorate Identifier 2006-NM-087-AD]
RIN 2120-AA64
Airworthiness Directives; McDonnell Douglas Model DC-9-81 (MD-
81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88
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 McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82),
DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88 airplanes. This proposed AD
would require installing a clamp, a bonding jumper assembly, and
attaching hardware to the refueling manifold in the right wing
refueling station area. This proposed AD results from fuel system
reviews conducted by the manufacturer. We are proposing this AD to
prevent arcing on the in-tank side of the fueling valve during a
lightning strike, which could result in an ignition source that could
ignite fuel vapor and cause a fuel tank explosion.
DATES: We must receive comments on this proposed AD by July 3, 2006.
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 Boeing Commercial Airplanes, Long Beach Division, 3855
Lakewood Boulevard, Long Beach, California 90846, Attention: Data and
Service Management, Dept. C1-L5A (D800-0024), for the service
information identified in this proposed AD.
FOR FURTHER INFORMATION CONTACT: William Bond, Aerospace Engineer,
Propulsion Branch, ANM-140L, FAA, Los Angeles Aircraft Certification
Office, 3960 Paramount Boulevard, Lakewood, California 90712-4137;
telephone (562) 627-5253; fax (562) 627-5210.
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-2006-
24786; Directorate Identifier 2006-NM-087-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 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
The FAA has examined the underlying safety issues involved in fuel
tank explosions on several large transport airplanes, including the
adequacy of existing regulations, the service history of airplanes
subject to those regulations, and existing maintenance practices for
fuel tank systems. As a result of those findings, we issued a
regulation titled ``Transport Airplane Fuel Tank System Design Review,
Flammability Reduction and Maintenance and Inspection Requirements''
(67 FR 23086, May 7, 2001). In addition to new airworthiness standards
for transport airplanes and new maintenance requirements, this rule
included Special Federal Aviation Regulation No. 88 (``SFAR 88,''
Amendment 21-78, and subsequent Amendments 21-82 and 21-83).
Among other actions, SFAR 88 requires certain type design (i.e.,
type certificate (TC) and supplemental type certificate (STC)) holders
to substantiate that their fuel tank systems can prevent ignition
sources in the fuel tanks. This requirement applies to type design
holders for large turbine-powered transport airplanes and for
subsequent modifications to those airplanes. It requires them to
perform design reviews and to develop design changes and maintenance
procedures if their designs do not meet the new fuel tank safety
standards. As explained in the preamble to the rule, we intended to
adopt airworthiness directives to mandate any changes found necessary
to address unsafe conditions identified as a result of these reviews.
In evaluating these design reviews, we have established four
criteria intended to define the unsafe conditions associated with fuel
tank systems that require corrective actions. The percentage of
operating time during which fuel tanks are exposed to flammable
conditions is one of these criteria. The other three criteria address
the failure types under evaluation: single failures, single failures in
[[Page 28627]]
combination with a latent condition(s), and in-service failure
experience. For all four criteria, the evaluations included
consideration of previous actions taken that may mitigate the need for
further action.
We have determined that the actions identified in this AD are
necessary to reduce the potential of ignition sources inside fuel
tanks, which, in combination with flammable fuel vapors, could result
in fuel tank explosions and consequent loss of the airplane.
We have received a report indicating that a SFAR 88 review of the
fuel system on McDonnell Douglas Model MD-80 airplanes revealed a
potential for arcing on the in-tank side of the fueling valve during a
lightning strike. The non-conductive coating, which keeps the rigid
pipes and valves electrically isolated, may wear off or be scratched.
Any wear or scratch in the coating could allow lightning-induced
current to flow from the refueling manifold to the airplane structure
through the fueling valve and could cause arcing. Arcing on the in-tank
side of the fueling valve could result in an ignition source that could
ignite fuel vapor and cause a fuel tank explosion.
Relevant Service Information
We have reviewed Boeing Service Bulletin MD80-28-213, dated May 16,
2005. The service bulletin describes procedures for installing a clamp,
a bonding jumper assembly, and attaching hardware to the refueling
manifold in the right wing refueling station area. Accomplishing the
actions specified in the service information is intended to adequately
address the unsafe condition.
FAA's Determination and Requirements of the Proposed AD
We have evaluated all pertinent information and identified an
unsafe condition that is likely to exist or develop on other airplanes
of this same type design. For this reason, we are proposing this AD,
which would require accomplishing the actions specified in the service
information described previously.
Costs of Compliance
There are about 994 airplanes of the affected design in the
worldwide fleet. This proposed AD would affect about 573 airplanes of
U.S. registry. The proposed actions would take about 2 work hours per
airplane, at an average labor rate of $80 per work hour. Required parts
would cost about $8 per airplane. Based on these figures, the estimated
cost of the proposed AD for U.S. operators is $96,264, or $168 per
airplane.
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):
McDonnell Douglas: Docket No. FAA-2006-24786; Directorate Identifier
2006-NM-087-AD.
Comments Due Date
(a) The FAA must receive comments on this AD action by July 3,
2006.
Affected ADs
(b) None.
Applicability
(c) This AD applies to McDonnell Douglas Model DC-9-81 (MD-81),
DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87), and MD-88
airplanes, certificated in any category; as identified in Boeing
Service Bulletin MD80-28-213, dated May 16, 2005.
Unsafe Condition
(d) This AD results from fuel system reviews conducted by the
manufacturer. We are issuing this AD to prevent arcing on the in-
tank side of the fueling valve during a lightning strike, which
could result in an ignition source that could ignite fuel vapor and
cause a fuel tank explosion.
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.
Electrical Bond Installation
(f) Within 60 months after the effective date of this AD,
install a clamp, a bonding jumper assembly, and attaching hardware
to the refueling manifold in the right wing refueling station area;
in accordance with the Accomplishment Instructions of Boeing Service
Bulletin MD80-28-213, dated May 16, 2005.
Alternative Methods of Compliance (AMOCs)
(g)(1) The Manager, Los Angeles 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.
[[Page 28628]]
Issued in Renton, Washington, on May 9, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E6-7479 Filed 5-16-06; 8:45 am]
BILLING CODE 4910-13-P