Airworthiness Directives; The Boeing Company Airplanes Model 737-600, -700, -700C, -800, -900, and -900ER Series Airplanes, 69159-69161 [2011-28856]
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Federal Register / Vol. 76, No. 216 / Tuesday, November 8, 2011 / Proposed Rules
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2011–1222; Directorate
Identifier 2010–NM–268–AD]
RIN 2120–AA64
Airworthiness Directives; The Boeing
Company Airplanes Model 737–600,
–700, –700C, –800, –900, and –900ER
Series Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for certain
The Boeing Company Airplanes Model
737–600, –700, –700C, –800, –900, and
–900ER series airplanes. This proposed
AD would require checking the escape
slide girt for serviceability and
replacement if necessary, modifying the
cable routing provision, replacing the
regulator padding, modifying the
aspirator orientation, and modifying the
valise. This proposed AD also would,
for certain airplanes, require modifying
or replacing the Vespel piston,
modifying the pilot valve regulator,
installing a new firing cable and safety
pin, and modifying the slide valise. This
proposed AD was prompted by reports
of escape slides failing to deploy from
the forward and aft right-hand doors
during scheduled maintenance slide
deployments, which could result in the
slide being unusable during an
emergency evacuation and increased
likelihood of injury to passengers or
crewmembers due to the difficulty in
evacuating the aircraft.
DATES: We must receive comments on
this proposed AD by December 23,
2011.
SUMMARY:
You may send comments by
any of the following methods:
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
instructions for submitting comments.
• Fax: (202) 493–2251.
• Mail: U.S. Department of
Transportation, Docket Operations,
M–30, West Building Ground Floor,
Room W12–140, 1200 New Jersey
Avenue SE., Washington, DC 20590.
• Hand Delivery: Deliver to Mail
address above between 9 a.m. and
5 p.m., Monday through Friday, except
Federal holidays.
For service information identified in
this proposed AD, contact Goodrich
Corporation, Aircraft Interior Products,
Attn: Technical Publications, 3414
mstockstill on DSK4VPTVN1PROD with PROPOSALS
ADDRESSES:
VerDate Mar<15>2010
16:17 Nov 07, 2011
Jkt 226001
South Fifth Street, Phoenix, Arizona
85040; phone: (602) 243–2270; email:
george.yribarren@goodrich.com;
Internet: https://www.goodrich.com/
TechPubs. You may review copies of the
referenced service information at the
FAA, Transport Airplane Directorate,
1601 Lind Avenue SW., Renton,
Washington. For information on the
availability of this material at the FAA,
call (425) 227–1221.
Examining the AD Docket
You may examine the AD docket on
the Internet at https://
www.regulations.gov; or in person at the
Docket Management Facility between
9 a.m. and 5 p.m., Monday through
Friday, except Federal holidays. The AD
docket contains this proposed AD, the
regulatory evaluation, any comments
received, and other information. The
street address for the Docket Office
(phone: (800) 647–5527) is in the
ADDRESSES section. Comments will be
available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT:
Patrick Gillespie, Aerospace Engineer,
Cabin Safety & Environmental Systems
Branch, ANM–150S, Seattle Aircraft
Certification Office (ACO), FAA, 1601
Lind Avenue SW., Renton, Washington
98057–3356; phone: (425) 917–6429;
fax: (425) 917–6590; email:
Patrick.Gillespie@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written
relevant data, views, or arguments about
this proposal. Send your comments to
an address listed under the ADDRESSES
section. Include ‘‘Docket No. FAA–
2011–1222; Directorate Identifier 2010–
NM–268–AD’’ at the beginning of your
comments. We specifically invite
comments on the overall regulatory,
economic, environmental, and energy
aspects of this proposed AD. We will
consider all comments received by the
closing date and may amend this
proposed AD because of those
comments.
We will post all comments we
receive, without change, to https://
www.regulations.gov, including any
personal information you provide. We
will also post a report summarizing each
substantive verbal contact we receive
about this proposed AD.
Discussion
We have received eight reports from
five operators of escape slides failing to
deploy from the forward and aft righthand doors during scheduled
maintenance slide deployments. During
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Sfmt 4702
69159
the attempted escape slide deployments,
the valise release cable was caught in
the gap between the latch bracket and
the lower edge of the aft side of the
compartment latch bracket. This caused
the door to stall, ultimately preventing
the door from fully opening, which
prevented escape slide deployment.
This condition, if not corrected, could
result in the escape slide being unusable
during an emergency evacuation and
increased likelihood of injury to
passengers or crewmembers due to the
difficulty in evacuating the aircraft.
Relevant Service Information
We reviewed Goodrich Service
Bulletin 5A3307–25–389, dated
November 8, 2010. This service
information describes procedures for
checking the escape slide girt for
continued serviceability, and replacing
the girt with a new girt if necessary.
This service information also describes
procedures for modifying the cable
routing provision on the girt by
removing three Velcro tabs and
installing two fabric tunnels.
Additionally, this service information
describes procedures for modifying the
valise by removing the parachute spring
band and installing an aspirator support
pad, replacing the regulator valve
padding with new padding, and
repacking the slide with the aspirator in
a different orientation within the slide
pack.
Concurrent Service Information
For slides having certain part
numbers, Goodrich Service Bulletin
5A3307–25–389, dated November 8,
2010, specifies concurrent
accomplishment of a modification
specified in Goodrich Service Bulletin
5A3307–25–339, Revision 3, dated May
8, 2009. The modification involves
modifying certain pilot valve regulators
by replacing the trigger housing,
bushing, and rod; installing a new firing
cable and safety pin; and modifying the
slide valise to accept the safety pin used
with the modified valve.
For certain slides, Goodrich Service
Bulletin 5A3307–25–389, dated
November 8, 2010, also specifies
concurrent accomplishment of Goodrich
Service Bulletin 25–349, Revision 1,
dated January 11, 2010, which describes
procedures for modifying the Vespel
piston in the regulator valves, or as an
option to the modification, replacing the
Vespel piston with a certain new or
serviceable Vespel piston.
Other Relevant Rulemaking
Slides having part number (P/N)
5A3307–3 are affected by Boeing
Service Bulletin 737–25–1491, dated
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08NOP1
69160
Federal Register / Vol. 76, No. 216 / Tuesday, November 8, 2011 / Proposed Rules
April 23, 2007, which is mandated by
AD 2008–24–08, Amendment 39–15748
(73 FR 72320, November 28, 2008). The
modification specified by Goodrich
Service Bulletin 5A3307–25–339,
Revision 3, dated May 8, 2009, is
approved as an alternative method of
compliance (AMOC) to the slide
modification required by AD 2008–24–
08.
FAA’s Determination
We are proposing this AD because we
evaluated all the relevant information
and determined the unsafe condition
described previously is likely to exist or
develop in other products of the same
type design.
389, dated November 8, 2010; Goodrich
Service Bulletin 5A3307–25–339,
Revision 3, dated May 8, 2009; and
Goodrich Service Bulletin 25–349,
Revision 1, dated January 11, 2010;
described previously.
Proposed AD Requirements
This proposed AD would require
accomplishing the actions specified in
Goodrich Service Bulletin 5A3307–25–
We estimate that this proposed AD
affects 557 airplanes of U.S. registry.
We estimate the following costs to
comply with this proposed AD:
Costs of Compliance
ESTIMATED COSTS
Action
Labor cost
Parts cost
Cost per
product
Check girt for serviceability, modify girt and
valise, orientation, and replace padding.
Modify regulator valve, install cable and pin,
and modify slide valise.
Modify Vespel piston ......................................
2 work-hours × $85
per hour = $170.
1 work-hour × $85 per
hour = $85.
1 work-hour × $85 per
hour = $85.
1 work-hour × $85 per
hour = $85.
$223 ...........................
$393 ...........................
$218,901.
Between $1,749 and
$1,836.
$0 ...............................
Between $1,834 and
$1,921.
$85 .............................
Between $1,021,538
and $1,069,997.
$47,345.
$612 ...........................
$697 ...........................
$388,229.
Optional Vespel piston replacement ..............
We estimate the following costs to do
any necessary replacements that would
be required based on the results of the
check of the girt. We have no way of
Cost on U.S.
operators
determining the number of aircraft that
might need these replacements.
ON-CONDITION COSTS
Action
Labor cost
Girt replacement (Service Bulletin 5A3307–25–389) .......
1 work-hour × $85 per hour = $85 ..................................
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According to the parts supplier, some
of the costs of this proposed AD may be
covered under warranty, thereby
reducing the cost impact on affected
individuals. We do not control warranty
coverage for affected individuals. As a
result, we have included all costs in our
cost estimate.
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
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16:17 Nov 07, 2011
Jkt 226001
products identified in this rulemaking
action.
Regulatory Findings
We determined that this proposed AD
would not have federalism implications
under Executive Order 13132. This
proposed AD would not have a
substantial direct effect on the States, on
the relationship between the national
Government and the States, or on the
distribution of power and
responsibilities among the various
levels of government.
For the reasons discussed above, I
certify this proposed regulation:
(1) Is not a ‘‘significant regulatory
action’’ under Executive Order 12866,
(2) Is not a ‘‘significant rule’’ under
the DOT Regulatory Policies and
Procedures (44 FR 11034, February 26,
1979),
(3) Will not affect intrastate aviation
in Alaska, and
(4) Will not have a significant
economic impact, positive or negative,
on a substantial number of small entities
under the criteria of the Regulatory
Flexibility Act.
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Fmt 4702
Sfmt 4702
Parts cost
Cost per
product
$942
$1,027
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Incorporation by reference,
Safety.
The Proposed Amendment
Accordingly, under the authority
delegated to me by the Administrator,
the FAA proposes to amend 14 CFR part
39 as follows:
PART 39—AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13
[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive (AD):
The Boeing Company: Docket No. FAA–
2011–1222; Directorate Identifier 2010–
NM–268–AD.
(a) Comments Due Date
We must receive comments by December
23, 2011.
E:\FR\FM\08NOP1.SGM
08NOP1
Federal Register / Vol. 76, No. 216 / Tuesday, November 8, 2011 / Proposed Rules
(b) Affected ADs
This AD affects AD 2008–24–08,
Amendment 39–15748 (73 FR 72320,
November 28, 2008).
(c) Applicability
This AD applies to The Boeing Company
Model 737–600, –700, –700C, –800, –900,
and –900ER series airplanes, certificated in
any category, with Goodrich Corporation
door escape slide part number (P/N) 5A3086–
1, –3, or –301, serial number (S/N) B3F001
through B3F611 inclusive; P/N 5A3088–1,
–3, or –301, S/N B3A001 through B3A685
inclusive; or P/N 5A3307–1, –3, –5, or –301,
S/N BNG0001 through BNG5707 inclusive.
(d) Subject
Joint Aircraft System Component (JASC)/
Air Transport Association (ATA) of America
Code 25, Equipment/Furnishings.
(e) Unsafe Condition
This AD was prompted by reports of
escape slides failing to deploy from the
forward and aft right-hand doors during
scheduled maintenance slide deployments.
We are issuing this AD to prevent failure of
an escape slide to deploy, which could result
in the slide being unusable during an
emergency evacuation and increased
likelihood of injury to passengers or
crewmembers due to the difficulty in
evacuating the aircraft.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
mstockstill on DSK4VPTVN1PROD with PROPOSALS
(g) Girt Check and Slide Modification
Within 36 months after the effective date
of this AD: Do the actions in paragraph (g)(1)
and (g)(2) of this AD.
(1) Check the girt for continued
serviceability, in accordance with the
Accomplishment Instructions of Goodrich
Service Bulletin 5A3307–25–389, dated
November 8, 2010. If the girt is
unserviceable: Before further flight, replace
the girt with a new girt, in accordance with
the Accomplishment Instructions of
Goodrich Service Bulletin 5A3307–25–389,
dated November 8, 2010.
(2) Modify the cable routing provision on
the girt, modify the valise, replace the
regulator padding, and modify the aspirator
orientation in the slide pack, in accordance
with the Accomplishment Instructions of
Goodrich Service Bulletin 5A3307–25–389,
dated November 8, 2010
(h) Concurrent Requirements
(1) For slide P/N 5A3307–3 or 5A3307–
301: Prior to or concurrently with
accomplishing the actions required by
paragraph (g) of this AD, modify the pilot
valve regulator P/N 4A3865–2, –3, or –4, as
applicable; install a new firing cable and
safety pin; and modify the slide valise; in
accordance with the Accomplishment
Instructions of Goodrich Service Bulletin
5A3307–25–339, Revision 3, dated May 8,
2009.
(2) For slide P/N 5A3307–3, 5A3307–5, or
5A3307–301: Prior to or concurrently with
accomplishing the actions required by
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16:17 Nov 07, 2011
Jkt 226001
paragraph (g) of this AD, modify the Vespel
piston in the regulator valves or replace the
Vespel piston with a new or serviceable
Vespel piston P/N 3A3566–2 or 3A3832–2, as
applicable, in accordance with the
Accomplishment Instructions of Goodrich
Service Bulletin 25–349, Revision 1, dated
January 11, 2010.
(i) Credit for Actions Accomplished in
Accordance With Previous Service
Information
(1) Modifying the pilot valve regulator,
installing a new firing cable and safety pin,
or modifying the slide valise in accordance
with Goodrich Service Bulletin 5A3307–25–
339, Revision 1, dated September 26, 2003;
or Revision 2, dated March 31, 2004; before
the effective date of this AD is acceptable for
compliance with the corresponding
modification or installations required by
paragraph (h) of this AD.
(2) Modifying or replacing the Vespel
piston in the regulator valves, in accordance
with Goodrich Service Bulletin 25–349,
dated September 15, 2004, before the
effective date of this AD is acceptable for
compliance with the corresponding
modification required by paragraph (h) of
this AD.
(j) Parts Installation
As of the effective date of this AD, no
person may install on any airplane a part
identified in paragraph (j)(1), (j)(2), or (j)(3)
of this AD.
(1) A regulator having P/N 4A3865–2, –3,
or –4.
(2) An evacuation system having P/N
5A3086–1, –3, or –301, serial number (S/N)
B3F001 through B3F611 inclusive; P/N
5A3088–1, –3, or –301, S/N B3A001 through
B3A685 inclusive; or P/N 5A3307–1, –3, –5,
or –301, S/N BNG0001 through BNG5707
inclusive.
(3) Regulator valve padding having P/N
3A4047–13.
(k) Alternative Methods of Compliance
(AMOCs)
(1) The Manager, Seattle Aircraft
Certification Office, FAA, has the authority to
approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19.
In accordance with 14 CFR 39.19, send your
request to your principal inspector or local
Flight Standards District Office, as
appropriate. If sending information directly
to the manager of the ACO, send it to the
attention of the person identified in the
Related Information section of this AD.
Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov.
(2) Before using any approved AMOC,
notify your appropriate principal inspector,
or lacking a principal inspector, the manager
of the local flight standards district office/
certificate holding district office.
(l) Related Information
(1) For more information about this AD,
contact Patrick Gillespie, Aerospace
Engineer, Cabin Safety & Environmental
Systems Branch, ANM–150S, Seattle Aircraft
Certification Office (ACO), FAA, 1601 Lind
Avenue SW., Renton, Washington 98057–
PO 00000
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Fmt 4702
Sfmt 4702
69161
3356; phone: (425) 917–6429; fax: (425) 917–
6590; email: Patrick.Gillespie@faa.gov.
(2) For service information identified in
this AD, contact Goodrich Corporation,
Aircraft Interior Products, Attn: Technical
Publications, 3414 South Fifth Street,
Phoenix, Arizona 85040; phone: (602) 243–
2270; email: george.yribarren@goodrich.com;
Internet: https://www.goodrich.com/
TechPubs. You may review copies of the
referenced service information at the FAA,
Transport Airplane Directorate, the FAA,
1601 Lind Avenue SW., Renton, Washington.
For information on the availability of this
material at the FAA, call (425) 227–1221.
Issued in Renton, Washington, on October
27, 2011.
Kalene C. Yanamura,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. 2011–28856 Filed 11–7–11; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2011–1227; Directorate
Identifier 2011–NM–100–AD]
RIN 2120–AA64
Airworthiness Directives; Bombardier,
Inc. Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
We propose to adopt a new
airworthiness directive (AD) for all
Bombardier, Inc. Model CL–600–2C10
(Regional Jet Series 700, 701, & 702)
airplanes; Model CL–600–2D15
(Regional Jet Series 705) airplanes; and
Model CL–600–2D24 (Regional Jet
Series 900) airplanes. This proposed AD
results from mandatory continuing
airworthiness information (MCAI)
originated by an aviation authority of
another country to identify and correct
an unsafe condition on an aviation
product. The MCAI describes the unsafe
condition as:
SUMMARY:
A number of reports of aileron control
stiffness have been received on Bombardier
Regional Jet aeroplanes. Bombardier has
reviewed the current maintenance tasks for
the aileron control system and determined
that an additional maintenance task is
required.
* * * [A]ileron control stiffness during flight
* * * could result in reduced controllability
of the aeroplane.
The proposed AD would require
actions that are intended to address the
unsafe condition described in the MCAI.
E:\FR\FM\08NOP1.SGM
08NOP1
Agencies
[Federal Register Volume 76, Number 216 (Tuesday, November 8, 2011)]
[Proposed Rules]
[Pages 69159-69161]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-28856]
[[Page 69159]]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2011-1222; Directorate Identifier 2010-NM-268-AD]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes Model 737-
600, -700, -700C, -800, -900, and -900ER Series Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: We propose to adopt a new airworthiness directive (AD) for
certain The Boeing Company Airplanes Model 737-600, -700, -700C, -800,
-900, and -900ER series airplanes. This proposed AD would require
checking the escape slide girt for serviceability and replacement if
necessary, modifying the cable routing provision, replacing the
regulator padding, modifying the aspirator orientation, and modifying
the valise. This proposed AD also would, for certain airplanes, require
modifying or replacing the Vespel piston, modifying the pilot valve
regulator, installing a new firing cable and safety pin, and modifying
the slide valise. This proposed AD was prompted by reports of escape
slides failing to deploy from the forward and aft right-hand doors
during scheduled maintenance slide deployments, which could result in
the slide being unusable during an emergency evacuation and increased
likelihood of injury to passengers or crewmembers due to the difficulty
in evacuating the aircraft.
DATES: We must receive comments on this proposed AD by December 23,
2011.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
Fax: (202) 493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this proposed AD, contact
Goodrich Corporation, Aircraft Interior Products, Attn: Technical
Publications, 3414 South Fifth Street, Phoenix, Arizona 85040; phone:
(602) 243-2270; email: george.yribarren@goodrich.com; Internet: https://www.goodrich.com/TechPubs. You may review copies of the referenced
service information at the FAA, Transport Airplane Directorate, 1601
Lind Avenue SW., Renton, Washington. For information on the
availability of this material at the FAA, call (425) 227-1221.
Examining the AD Docket
You may examine the AD docket on the Internet at https://www.regulations.gov; or in person at the Docket Management Facility
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Office (phone: (800) 647-5527) is in the
ADDRESSES section. Comments will be available in the AD docket shortly
after receipt.
FOR FURTHER INFORMATION CONTACT: Patrick Gillespie, Aerospace Engineer,
Cabin Safety & Environmental Systems Branch, ANM-150S, Seattle Aircraft
Certification Office (ACO), FAA, 1601 Lind Avenue SW., Renton,
Washington 98057-3356; phone: (425) 917-6429; fax: (425) 917-6590;
email: Patrick.Gillespie@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under the ADDRESSES section. Include ``Docket No. FAA-2011-1222;
Directorate Identifier 2010-NM-268-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD because of those comments.
We will post all comments we receive, without change, to https://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
We have received eight reports from five operators of escape slides
failing to deploy from the forward and aft right-hand doors during
scheduled maintenance slide deployments. During the attempted escape
slide deployments, the valise release cable was caught in the gap
between the latch bracket and the lower edge of the aft side of the
compartment latch bracket. This caused the door to stall, ultimately
preventing the door from fully opening, which prevented escape slide
deployment. This condition, if not corrected, could result in the
escape slide being unusable during an emergency evacuation and
increased likelihood of injury to passengers or crewmembers due to the
difficulty in evacuating the aircraft.
Relevant Service Information
We reviewed Goodrich Service Bulletin 5A3307-25-389, dated November
8, 2010. This service information describes procedures for checking the
escape slide girt for continued serviceability, and replacing the girt
with a new girt if necessary. This service information also describes
procedures for modifying the cable routing provision on the girt by
removing three Velcro tabs and installing two fabric tunnels.
Additionally, this service information describes procedures for
modifying the valise by removing the parachute spring band and
installing an aspirator support pad, replacing the regulator valve
padding with new padding, and repacking the slide with the aspirator in
a different orientation within the slide pack.
Concurrent Service Information
For slides having certain part numbers, Goodrich Service Bulletin
5A3307-25-389, dated November 8, 2010, specifies concurrent
accomplishment of a modification specified in Goodrich Service Bulletin
5A3307-25-339, Revision 3, dated May 8, 2009. The modification involves
modifying certain pilot valve regulators by replacing the trigger
housing, bushing, and rod; installing a new firing cable and safety
pin; and modifying the slide valise to accept the safety pin used with
the modified valve.
For certain slides, Goodrich Service Bulletin 5A3307-25-389, dated
November 8, 2010, also specifies concurrent accomplishment of Goodrich
Service Bulletin 25-349, Revision 1, dated January 11, 2010, which
describes procedures for modifying the Vespel piston in the regulator
valves, or as an option to the modification, replacing the Vespel
piston with a certain new or serviceable Vespel piston.
Other Relevant Rulemaking
Slides having part number (P/N) 5A3307-3 are affected by Boeing
Service Bulletin 737-25-1491, dated
[[Page 69160]]
April 23, 2007, which is mandated by AD 2008-24-08, Amendment 39-15748
(73 FR 72320, November 28, 2008). The modification specified by
Goodrich Service Bulletin 5A3307-25-339, Revision 3, dated May 8, 2009,
is approved as an alternative method of compliance (AMOC) to the slide
modification required by AD 2008-24-08.
FAA's Determination
We are proposing this AD because we evaluated all the relevant
information and determined the unsafe condition described previously is
likely to exist or develop in other products of the same type design.
Proposed AD Requirements
This proposed AD would require accomplishing the actions specified
in Goodrich Service Bulletin 5A3307-25-389, dated November 8, 2010;
Goodrich Service Bulletin 5A3307-25-339, Revision 3, dated May 8, 2009;
and Goodrich Service Bulletin 25-349, Revision 1, dated January 11,
2010; described previously.
Costs of Compliance
We estimate that this proposed AD affects 557 airplanes of U.S.
registry.
We estimate the following costs to comply with this proposed AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Check girt for serviceability, 2 work-hours x $85 $223.............. $393.............. $218,901.
modify girt and valise, per hour = $170.
orientation, and replace
padding.
Modify regulator valve, install 1 work-hour x $85 Between $1,749 and Between $1,834 and Between $1,021,538
cable and pin, and modify slide per hour = $85. $1,836. $1,921. and $1,069,997.
valise.
Modify Vespel piston............ 1 work-hour x $85 $0................ $85............... $47,345.
per hour = $85.
Optional Vespel piston 1 work-hour x $85 $612.............. $697.............. $388,229.
replacement. per hour = $85.
----------------------------------------------------------------------------------------------------------------
We estimate the following costs to do any necessary replacements
that would be required based on the results of the check of the girt.
We have no way of determining the number of aircraft that might need
these replacements.
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
Girt replacement (Service Bulletin 5A3307-25- 1 work-hour x $85 per hour = $85...... $942 $1,027
389).
----------------------------------------------------------------------------------------------------------------
According to the parts supplier, some of the costs of this proposed
AD may be covered under warranty, thereby reducing the cost impact on
affected individuals. We do not control warranty coverage for affected
individuals. As a result, we have included all costs in our cost
estimate.
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
We determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify this proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska, and
(4) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new
airworthiness directive (AD):
The Boeing Company: Docket No. FAA-2011-1222; Directorate Identifier
2010-NM-268-AD.
(a) Comments Due Date
We must receive comments by December 23, 2011.
[[Page 69161]]
(b) Affected ADs
This AD affects AD 2008-24-08, Amendment 39-15748 (73 FR 72320,
November 28, 2008).
(c) Applicability
This AD applies to The Boeing Company Model 737-600, -700, -
700C, -800, -900, and -900ER series airplanes, certificated in any
category, with Goodrich Corporation door escape slide part number
(P/N) 5A3086-1, -3, or -301, serial number (S/N) B3F001 through
B3F611 inclusive; P/N 5A3088-1, -3, or -301, S/N B3A001 through
B3A685 inclusive; or P/N 5A3307-1, -3, -5, or -301, S/N BNG0001
through BNG5707 inclusive.
(d) Subject
Joint Aircraft System Component (JASC)/Air Transport Association
(ATA) of America Code 25, Equipment/Furnishings.
(e) Unsafe Condition
This AD was prompted by reports of escape slides failing to
deploy from the forward and aft right-hand doors during scheduled
maintenance slide deployments. We are issuing this AD to prevent
failure of an escape slide to deploy, which could result in the
slide being unusable during an emergency evacuation and increased
likelihood of injury to passengers or crewmembers due to the
difficulty in evacuating the aircraft.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Girt Check and Slide Modification
Within 36 months after the effective date of this AD: Do the
actions in paragraph (g)(1) and (g)(2) of this AD.
(1) Check the girt for continued serviceability, in accordance
with the Accomplishment Instructions of Goodrich Service Bulletin
5A3307-25-389, dated November 8, 2010. If the girt is unserviceable:
Before further flight, replace the girt with a new girt, in
accordance with the Accomplishment Instructions of Goodrich Service
Bulletin 5A3307-25-389, dated November 8, 2010.
(2) Modify the cable routing provision on the girt, modify the
valise, replace the regulator padding, and modify the aspirator
orientation in the slide pack, in accordance with the Accomplishment
Instructions of Goodrich Service Bulletin 5A3307-25-389, dated
November 8, 2010
(h) Concurrent Requirements
(1) For slide P/N 5A3307-3 or 5A3307-301: Prior to or
concurrently with accomplishing the actions required by paragraph
(g) of this AD, modify the pilot valve regulator P/N 4A3865-2, -3,
or -4, as applicable; install a new firing cable and safety pin; and
modify the slide valise; in accordance with the Accomplishment
Instructions of Goodrich Service Bulletin 5A3307-25-339, Revision 3,
dated May 8, 2009.
(2) For slide P/N 5A3307-3, 5A3307-5, or 5A3307-301: Prior to or
concurrently with accomplishing the actions required by paragraph
(g) of this AD, modify the Vespel piston in the regulator valves or
replace the Vespel piston with a new or serviceable Vespel piston P/
N 3A3566-2 or 3A3832-2, as applicable, in accordance with the
Accomplishment Instructions of Goodrich Service Bulletin 25-349,
Revision 1, dated January 11, 2010.
(i) Credit for Actions Accomplished in Accordance With Previous Service
Information
(1) Modifying the pilot valve regulator, installing a new firing
cable and safety pin, or modifying the slide valise in accordance
with Goodrich Service Bulletin 5A3307-25-339, Revision 1, dated
September 26, 2003; or Revision 2, dated March 31, 2004; before the
effective date of this AD is acceptable for compliance with the
corresponding modification or installations required by paragraph
(h) of this AD.
(2) Modifying or replacing the Vespel piston in the regulator
valves, in accordance with Goodrich Service Bulletin 25-349, dated
September 15, 2004, before the effective date of this AD is
acceptable for compliance with the corresponding modification
required by paragraph (h) of this AD.
(j) Parts Installation
As of the effective date of this AD, no person may install on
any airplane a part identified in paragraph (j)(1), (j)(2), or
(j)(3) of this AD.
(1) A regulator having P/N 4A3865-2, -3, or -4.
(2) An evacuation system having P/N 5A3086-1, -3, or -301,
serial number (S/N) B3F001 through B3F611 inclusive; P/N 5A3088-1, -
3, or -301, S/N B3A001 through B3A685 inclusive; or P/N 5A3307-1, -
3, -5, or -301, S/N BNG0001 through BNG5707 inclusive.
(3) Regulator valve padding having P/N 3A4047-13.
(k) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Seattle Aircraft Certification Office, FAA, has
the authority to approve AMOCs for this AD, if requested using the
procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19,
send your request to your principal inspector or local Flight
Standards District Office, as appropriate. If sending information
directly to the manager of the ACO, send it to the attention of the
person identified in the Related Information section of this AD.
Information may be emailed to: 9-ANM-Seattle-ACO-AMOC-Requests@faa.gov.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(l) Related Information
(1) For more information about this AD, contact Patrick
Gillespie, Aerospace Engineer, Cabin Safety & Environmental Systems
Branch, ANM-150S, Seattle Aircraft Certification Office (ACO), FAA,
1601 Lind Avenue SW., Renton, Washington 98057-3356; phone: (425)
917-6429; fax: (425) 917-6590; email: Patrick.Gillespie@faa.gov.
(2) For service information identified in this AD, contact
Goodrich Corporation, Aircraft Interior Products, Attn: Technical
Publications, 3414 South Fifth Street, Phoenix, Arizona 85040;
phone: (602) 243-2270; email: george.yribarren@goodrich.com;
Internet: https://www.goodrich.com/TechPubs. You may review copies of
the referenced service information at the FAA, Transport Airplane
Directorate, the FAA, 1601 Lind Avenue SW., Renton, Washington. For
information on the availability of this material at the FAA, call
(425) 227-1221.
Issued in Renton, Washington, on October 27, 2011.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2011-28856 Filed 11-7-11; 8:45 am]
BILLING CODE 4910-13-P