Airworthiness Directives; Boeing Model 727-200 and 727-200F Series Airplanes; 737-200, 737-200C, 737-300, and 737-400 Series Airplanes; 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747SR, and 747SP Series Airplanes; 757-200 and 757-200PF Series Airplanes; and 767-200 and 767-300 Series Airplanes, 16986-16990 [05-6674]
Download as PDF
16986
Federal Register / Vol. 70, No. 63 / Monday, April 4, 2005 / Proposed Rules
October 6, 1995 (for Model 23, 24, and 25
airplanes), or Learjet Service Bulletin SB 35/
36–28–10, dated October 6, 1995 (for Model
35 and 36 airplanes); as applicable. Repeat
this inspection thereafter at intervals not to
exceed 600 hours time-in-service.
(1) If no deterioration of the flapper valve
is detected, prior to further flight, inspect the
flapper valve to ensure proper positioning,
inspect the condition of the screws that
retain the flapper valve to the plate assembly
to ensure that the flapper valve is secure,
inspect to ensure that the flapper valve
completely covers the opening of the tube
and is seated against the tube, and inspect
the flapper valve to verify that it moves
freely; and accomplish the follow-on
corrective actions, if any discrepancy is
found. These actions shall be accomplished
in accordance with the applicable service
bulletin.
(2) If any flapper valve is found to be
deteriorated, prior to further flight, replace it
with a new flapper valve in accordance with
the applicable service bulletin.
(g) Except as provided in paragraph (h) of
this AD, at the later of the times specified in
paragraphs (g)(1) and (g)(2) of this AD:
Replace both flappers of the tip tank in each
wing with new flappers in accordance with
either Learjet Service Bulletin SB 23/24/25–
28–2, dated October 6, 1995 (for Model 23,
24, and 25 airplanes), or Learjet Service
Bulletin SB 35/36–28–10, dated October 6,
1995 (for Model 35 and 36 airplanes); as
applicable.
(1) Within 5 years since date of installation
of the flapper valve, or prior to the
accumulation of 2,400 total hours time-inservice on the flapper valve, whichever
occurs earlier.
(2) Within 50 hours time-in-service after
December 27, 1995.
(h) For airplanes on which the age and
time-in-service of the flapper valve cannot be
determined: Within 50 hours time-in-service
after December 27, 1995, replace both
flappers of the tip tank in each wing in
accordance with either Learjet Service
Bulletin SB 23/24/25–28–2, dated October 6,
1995 (for Model 23, 24, and 25 airplanes), or
Learjet Service Bulletin SB 35/36–28–10,
dated October 6, 1995 (for Model 35 and 36
airplanes); as applicable.
(i) Within 600 hours time-in-service
following replacement of any flapper valve in
accordance with the requirements of this AD,
and thereafter at intervals not to exceed 600
hours time-in-service: Accomplish the
requirements of paragraph (f) of this AD.
flappers and flapper assemblies can be
conclusively determined from that review.
(1) If four flappers having P/N 2323006–
802 and four flapper assemblies having P/N
2323006–801 are found installed, no further
action is required by this paragraph, and the
repetitive inspections required by paragraphs
(f) and (i) of this AD can be stopped.
(2) If any flapper having P/N 2323006–5 or
any flapper assembly having P/N 2323006–6
is found installed, within 600 hours time-inservice since last replacement of any flapper
valve in accordance with the requirements of
this AD, replace the flapper valve with a new
flapper valve or replace the flapper assembly
with new or modified and reidentified
assembly, as applicable. The replacement
must be done in accordance with the
Accomplishment Instructions of Learjet
Service Bulletin 23/24/25–28–7, Revision 2,
dated May 9, 2001 (for Model 23, 24, and 25
airplanes); or Learjet Service Bulletin 35/36–
28–14, Revision 2, dated May 9, 2001 (for
Model 35 and 36 airplanes); as applicable.
Accomplishment of the replacement ends the
repetitive inspections required by paragraphs
(f) and (i) of this AD.
Parts Installation
(k) As of the effective date of this AD, no
person may install a flapper having P/N
2323006–5 or a flapper assembly having P/
N 2323006–6, on any airplane.
Alternative Methods of Compliance (AMOCs)
(l)(1) The Manager, Wichita 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) AMOCs approved previously according
to AD 95–25–03 are not approved as AMOCs
with this AD.
Issued in Renton, Washington, on March
22, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate,
Aircraft Certification Service.
[FR Doc. 05–6579 Filed 4–1–05; 8:45 am]
BILLING CODE 4910–13–P
New Requirements
Inspection and Replacement
(j) Within 600 hours time-in-service since
last replacement of any flapper valve in
accordance with the requirements of this AD,
or within 90 days after the effective date of
this AD, whichever occurs later, inspect the
flappers and flapper assemblies of the tip
tank in each wing to determine their part
numbers (P/N). The raised letter and
numbers ‘‘S–461’’ on the convex side of the
flappers can identify these parts. Instead of
inspecting the flappers and flapper
assemblies, a review of airplane maintenance
records is acceptable if the P/N of the
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2005–20836; Directorate
Identifier 2005–NM–028–AD]
RIN 2120–AA64
Airworthiness Directives; Boeing
Model 727–200 and 727–200F Series
Airplanes; 737–200, 737–200C, 737–
300, and 737–400 Series Airplanes;
747–100, 747–100B, 747–100B SUD,
747–200B, 747–200C, 747–200F, 747–
300, 747–400, 747SR, and 747SP Series
Airplanes; 757–200 and 757–200PF
Series Airplanes; and 767–200 and
767–300 Series Airplanes
Federal Aviation
Administration (FAA), Department of
Transportation (DOT).
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
SUMMARY: The FAA proposes to adopt a
new airworthiness directive (AD) for
certain Boeing transport category
airplanes. This proposed AD would
require replacing any insulation
blanket constructed of
polyethyleneteraphthalate (PET) film,
ORCON Orcofilm AN–26 (hereafter
‘‘AN–26’’) with a new insulation
blanket. This proposed AD is prompted
by reports of in-flight and ground fires
on certain airplanes manufactured with
insulation blankets covered with AN–
26, which may contribute to the spread
of a fire when ignition occurs from
sources such as electrical arcing or
sparking. We are proposing this AD to
ensure that insulation blankets
constructed of AN–26 are removed from
the fuselage. Such insulation blankets
could propagate a fire that is the result
of electrical arcing or sparking.
EFFECTIVE DATES: We must receive
comments on this proposed AD by June
3, 2005.
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.
• By fax: (202) 493–2251.
• Hand Delivery: Room PL–401 on
the plaza level of the Nassif Building,
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Federal Register / Vol. 70, No. 63 / Monday, April 4, 2005 / Proposed Rules
400 Seventh Street, SW., Washington,
DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
You can examine the contents of this
AD docket on the Internet at https://
dms.dot.gov, or in person at the Docket
Management Facility, U.S. Department
of Transportation, 400 Seventh Street
SW., room PL–401, on the plaza level of
the Nassif Building, Washington, DC.
This docket number is FAA–2005–
20836; the directorate identifier for this
docket is 2005–NM–028–AD.
FOR FURTHER INFORMATION CONTACT: Sue
Rosanske, Aerospace Engineer, Cabin
Safety and Environmental Systems
Branch, ANM–150S, FAA, Seattle
Aircraft Certification Office, 1601 Lind
Avenue, SW., Renton, Washington
98055–4056; telephone (425) 917–6448;
fax (425) 917–6590.
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 under
ADDRESSES. Include ‘‘Docket No. FAA–
2005–20836; Directorate Identifier
2005–NM–028–AD’’ in the subject line
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
submitted 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 can
review DOT’s complete Privacy Act
Statement in the Federal Register
published on April 11, 2000 (65 FR
19477–78), or you can visit https://
dms.dot.gov.
Examining the Docket
You can 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
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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 DMS
receives them.
Background
Based on research experiments and
in-service experience in the mid-1990’s,
the FAA initiated an investigation into
the adequacy of the existing Bunsen
burner flammability criteria for thermal/
acoustic insulation.
Thermal/acoustic insulation is
usually constructed in the form of what
is commonly referred to as a ‘‘blanket.’’
Insulation blankets are typically
composed of:
1. A batting material generically
referred to as fiberglass; and
2. A film covering to contain the
batting and to resist moisture
penetration.
Metallized polyethyleneteraphthalate
(MPET) and AN–26 are specific
manufacturers’ examples of these film
covering materials.
Our investigation included large-scale
fire testing, as well as tests for
ignitability; these tests covered a broad
range of materials. By the late 1990’s,
we had concluded that the Bunsen
burner test method required by the
existing rules was not adequate. That is,
the test method did not discriminate
between materials with desirable and
undesirable flammability characteristics
under realistic in-service conditions. A
new certification standard was therefore
needed.
In order to develop a new standard,
we had to quantify the potential hazard.
This involved additional large scale fire
testing and tests to correlate the large
scale tests with a laboratory scale test
method. A necessary element of any
new certification test method is that it
must screen out materials that would be
considered unacceptable for future
installation because those materials
would create the potential hazard that
the new test standard is intended to
prevent. The new test standard was
adopted into the regulations and
includes changes to the operating rules
for newly manufactured airplanes.
(Reference ‘‘Improved Flammability
Standards for Thermal/Acoustic
Insulation Materials Used in Transport
Category Airplanes’’ (68 FR 45046, July
31, 2003).) The operating rule changes
become effective in September of this
year.
In developing the new test standard,
we also developed criteria by which
materials already in service could be
judged as safe to remain in service. This
involved measuring their susceptibility
to an ignition source (such as an
PO 00000
Frm 00021
Fmt 4702
Sfmt 4702
16987
electrical arc or sparks) and their
tendency to propagate a fire once
ignited.
Materials that are susceptible to
ignition by electrical arc or sparks and
that would propagate a fire are
considered unsafe. Using these criteria,
we have published airworthiness
directives (AD) to address a particular
material. The following ADs require
removal of MPET:
• AD 2000–11–01, amendment 39–
11749 (65 FR 34321, May 26, 2000),
applicable to certain McDonnell
Douglas Model DC–9–80 and MD–90–30
series airplanes, and Model MD–88
airplanes;
• AD 2000–11–02, amendment 39–
11750 (65 FR 34341, May 26, 2000),
applicable to certain McDonnell
Douglas Model DC–10–10F, DC–10–15,
DC–10–30, DC–10–30F, and DC–10–40
series airplanes, and Model MD–11 and
–11F series airplanes; and
• AD 2003–08–10, amendment 39–
13122 (68 FR 19326, April 21, 2003),
applicable to certain Aerospatiale Model
ATR42–500 series airplanes, and Model
ATR72–102, –202, –212, and –212A
series airplanes.
At that time, MPET was the only
material identified that had
demonstrated the propensity to
propagate a fire from an ignition source
such as electrical arcing and sparks. We
indicated then that we would take the
same action, should any other materials
be identified.
Even though we did extensive testing
on a variety of materials, we could not
identify and test every material
produced, as the permutations of
material combinations were too
extensive to accomplish such testing in
a prudent time frame. As a result, we
were not aware of AN–26 as a unique
insulation material until a review of
subsequent service data indicated that
this material might not have adequate
flammability resistance. We conducted a
review of the service history and
subjected AN–26 material to a variety of
tests. In November 2003, we established
that AN–26 could propagate a fire from
an electrical arc. As part of our review,
we also worked with industry to explore
the potential ramifications of aging and
contamination on material performance.
Opinions differ on the significance of
these effects. After careful consideration
of this complex issue, we have
concluded that the flammability
characteristics of AN–26 are more a
factor of fundamental material
properties than a factor of aging or
contamination.
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Federal Register / Vol. 70, No. 63 / Monday, April 4, 2005 / Proposed Rules
Discussion
We have received reports of in-flight
and ground fires on certain Boeing
Model 737, 747, 757, and 767 series
airplanes that were manufactured with
insulation material covered with AN–
26. Investigation has revealed that AN–
26 covered insulation blankets may
contribute to the propagation of a fire.
The results of extensive flammability
testing, conducted by the airplane
manufacturer and the FAA, revealed
that even though AN–26 met the
certification standards in place at the
time of original certification in 1981,
this type of insulation material will
propagate a fire when subjected to
electrical arcing and sparks. The FAA
used the insulation blankets’ response
to electrical arcing and spark testing as
the basis for identifying the unsafe
condition with MPET and has
determined that these same safety
criteria are applicable to AN–26. In
addition, research data have shown that
contamination, such as dust, lint,
grease, corrosion-inhibiting compounds,
etc., can increase susceptibility to
ignition and flame propagation.
Insulation blankets constructed of
AN–26 installed throughout the
fuselage, if not corrected, could
propagate a fire that is the result of
electrical arcing or sparking.
We have determined that Boeing’s
preferred supplier of insulation blankets
produced blankets constructed of AN–
26 between July 1981 and December
1988. Therefore, it is likely that these
blankets are installed on almost all
Boeing airplanes produced during that
period, as listed in the following table:
BOEING AIRPLANE MODELS PRODUCED
BETWEEN JULY 1981 AND DECEMBER 1988
Model
727–200 and 727–200F series airplanes.
737–200, 737–200C, 737–300, and 737–400
series airplanes.
747–100, 747–100B, 747–100B SUD, 747–
200B, 747–200C, 747–200F, 747–300,
747–400, 747SR, and 747SP series airplanes.
757–200 and 757–200PF series airplanes.
767–200 and 767–300 series airplanes.
Eleven Boeing Model 747–400 series
airplanes were built in 1988 that are
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Jkt 205001
also likely to have AN–26 installed.
However, the type certificate was not
amended to include these airplanes
until 1989. Therefore, these airplanes
did not have an original Airworthiness
Certificate or original Export Certificate
of Airworthiness before January 1989.
The other affected airplanes were
issued an original Airworthiness
Certificate or original Export Certificate
of Airworthiness between July 1981 and
December 1988.
Unlike MPET, which is easily
distinguishable from other types of
insulation, AN–26 is similar in
appearance to other types of insulation
that are acceptable. At this time, there
is no documented method for
distinguishing between AN–26 and
these other types of insulation.
Other Relevant Service Information
The FAA issued Flight Standards
Information Bulletin for Airworthiness
(FSAW) 00–09, ‘‘Special Emphasis
Inspection on Contamination of
Thermal/Acoustic Insulation,’’ effective
September 28, 2000, to ensure that
operators have procedures defined in
their approved maintenance programs
for the inspection for contamination and
corrective action. The airplane
manufacturer also has recently revised
its service letters alerting operators to
methods for preventing and removing
contamination.
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. Therefore, we are
proposing this AD to require removing
all insulation blankets within the
pressurized areas of the affected
airplanes and installing a new
insulation blanket meeting the
requirements of Section 25.856(a) of
Title 14 of the Code of Federal
Regulations (CFR) (14 CFR 25.856(a)).
The proposed AD would also allow
operators to develop methods for
distinguishing between insulation
blankets constructed of AN–26 and
other materials. If the FAA’s Seattle
Aircraft Certification Office (ACO)
approves such a method, operators
would not be required to remove
blankets they determine are not
constructed of AN–26.
As of the effective date of this AD,
paragraph (h)(1) of this proposed AD
PO 00000
Frm 00022
Fmt 4702
Sfmt 4702
would prohibit installation of AN–26
insulation blankets. 14 CFR
91.613(b)(1), 121.312(e)(1),
125.113(c)(1), and 135.170(c)(1) already
prohibit installation of this type of
insulation blanket after September 2,
2005. Some international civil aviation
authorities have not adopted similar
regulations. Therefore, this prohibition
is included in this proposed AD to
inform them of the need to prevent such
installation.
As of six months after the effective
date of this AD, paragraph (h)(2) of this
proposed AD would also prohibit reinstallation of any insulation blanket
that has been removed for any reason
unless the insulation blanket either has
been determined not to be constructed
of AN–26, or has been modified to
comply with 14 CFR 25.856(a). For
example, during normal maintenance,
operators frequently remove insulation
to perform inspections and other
maintenance actions on systems and
structure located behind the insulation
blanket. Under this proposal, when
insulation is removed for this or any
other purpose, it must either be
determined not to be constructed of
AN–26, or replaced with insulation
meeting 14 CFR 25.856(a). This
paragraph would require operators to
correct the identified unsafe condition
when they have an opportunity to do so.
The airplane manufacturer has been
developing a proposed alternative
method of compliance (AMOC) that
involves modification of existing AN–26
insulation blankets. This method of
compliance may significantly reduce the
number of required replacement
blankets and labor costs. The
manufacturer has indicated that the
service information for this method will
be available in April 2006. We
anticipate that the manufacturer’s
approach is similar to AMOCs approved
for ADs 2000–11–01 and 2000–11–02.
The criteria that will be used to evaluate
proposed modifications of existing AN–
26 insulation blankets (in-place) can be
obtained from the Manager, Seattle
ACO, upon request.
Costs of Compliance
There are about 1,613 airplanes of the
affected design in the worldwide fleet.
The following table provides the
estimated costs for U.S. operators to
comply with the proposed replacement,
if necessary. The average labor rate is
$65 per hour.
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Federal Register / Vol. 70, No. 63 / Monday, April 4, 2005 / Proposed Rules
ESTIMATED COSTS FOR REPLACEMENT
Model
Work hours
727–200 series airplanes .................................................................
727–200F and 727–200 series airplanes that have been modified
to a freighter configuration ...........................................................
737–200, 737-200C, 737–300, and 737–400 series airplanes .......
747–100, 747–100B, 747–100B SUD, 747–200B, 747–200C,
747–300, 747–400, 747SR, and 747SP series airplanes ...........
747–200F and 747–200B and 747–300 series airplanes that have
been modified to a freighter configuration ...................................
757–200 series airplanes .................................................................
757–200PF and 757–200 series airplanes that have been modified to a freighter configuration ....................................................
767–200 and 767–300 series airplanes ..........................................
767–200 and 767–300 series airplanes that have been modified
to a freighter configuration ...........................................................
Regulatory Flexibility Determination
The Regulatory Flexibility Act of 1980
(RFA) establishes ‘‘as a principle of
regulatory issuance that agencies shall
endeavor, consistent with the objective
of the rule and of applicable statutes, to
fit regulatory and informational
requirements to the scale of the
business, organizations, and
governmental jurisdictions subject to
regulation.’’ To achieve that principle,
the RFA requires agencies to solicit and
consider flexible regulatory proposals
and to explain the rationale for their
actions. The RFA covers a wide-range of
small entities, including small
businesses, not-for-profit organizations
and small governmental jurisdictions.
Agencies must perform a review to
determine whether a proposed or final
rule will have a significant economic
impact on a substantial number of small
entities. If the agency determines that it
will, the agency must prepare a
regulatory flexibility analysis as
described in the Act.
The proposed AD would require
operators of certain Boeing transport
category airplanes, including about 20
small business operators, to retrofit their
airplanes. We believe that this proposed
AD would have a significant impact on
a substantial number of small entities.
Accordingly, an initial regulatory
flexibility analysis, as required by the
RFA, is included as part of the Initial
Regulatory Analysis that is in the
docket.
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
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15:01 Apr 01, 2005
Jkt 205001
Parts per
airplane
29
$9,946,971
$1,657,829
1,618
4,238
31,878
38,962
41
452
5,618,968
142,123,264
936,495
23,687,211
16,951
155,848
19
23,895,597
3,982,600
5,933
6,445
116,886
59,258
16
116
8,040,496
55,469,228
1,340,083
9,244,871
2,256
9,246
44,443
85,008
15
114
2,866,245
78,203,772
477,708
13,033,962
3,236
63,756
29
7,948,784
1,324,797
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation
safety, Safety.
Fmt 4702
Fleet cost per
year over 6
years
$42,504
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. Would have a significant economic
impact on a substantial number of small
entities, and as a result, an initial
regulatory flexibility analysis has been
conducted.
See the ADDRESSES section for a
location to examine the regulatory
evaluation.
Frm 00023
U.S. fleet cost
4,623
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.
PO 00000
Number
of U.S.registered
airplanes
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 FAA amends § 39.13 by adding
the following new airworthiness
directive (AD):
Boeing: Docket No. FAA–2005–20836;
Directorate Identifier 2005–NM–028–AD.
Comments Due Date
(a) The Federal Aviation Administration
(FAA) must receive comments on this AD
action by June 3, 2005.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing airplanes,
certificated in any category, specified in
paragraphs (c)(1) and (c)(2) of this AD.
(1) Boeing airplanes listed in Table 1 of
this AD, having an original Airworthiness
Certificate or original Export Certificate of
Airworthiness issued between July 1981 and
December 1988 inclusive.
TABLE 1.—APPLICABILITY OF CERTAIN
AIRPLANES
Model
727–200 and 727–200F series airplanes.
737–200, 737–200C, 737–300, and 737–400
series airplanes.
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Federal Register / Vol. 70, No. 63 / Monday, April 4, 2005 / Proposed Rules
TABLE 1.—APPLICABILITY OF CERTAIN
AIRPLANES—Continued
Model
747–100, 747–100B, 747–100B SUD, 747–
200B, 747–200C, 747–200F, 747–300,
747SR, and 747SP series airplanes.
757–200 and 757–200PF series airplanes.
767–200 and 767–300 series airplanes.
(2) Boeing Model 747–400 series airplanes,
serial numbers 23719, 23720, 23814, 23816,
23817, 23818, 23819, 23820, 23999, 24061,
and 24062.
Unsafe Condition
(d) This AD was prompted by reports of inflight and ground fires on certain airplanes
manufactured with insulation blankets
covered with a specific
polyethyleneteraphthalate (PET), ORCON
Orcofilm AN–26 (all variants, including
AN–26, AN–26A, and AN–26B), hereafter
referred to as ‘‘AN–26’’, which may
contribute to the spread of a fire when
ignition occurs from sources such as
electrical arcing or sparking. We are issuing
this AD to ensure that insulation blankets
constructed of AN–26 are removed from the
fuselage. Such insulation blankets could
propagate a fire that is the result of electrical
arcing or sparking.
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.
Replacement
(f) Except as provided in paragraph (g) of
this AD, within 72 months after the effective
date of this AD, remove all insulation
blankets from the pressurized areas of the
fuselage and install a new insulation blanket
using applicable maintenance manual
procedures. The new insulation blankets
must comply with 14 Code of Federal
Regulations (CFR) 25.856(a). The areas where
the affected insulation blankets are installed
include, but are not limited to, the following
areas:
(1) Crown area of the airplane;
(2) Areas behind flight deck panels and
circuit breaker panels;
(3) Areas behind sidewalls, lavatories,
closets, and galleys;
(4) Cargo compartment areas;
(5) Air ducting;
(6) Waste and water tubing; and
(7) Areas attached to the underside of floor
panels.
Exception
(g) The actions described in paragraph (f)
are not required for any insulation blanket
that is determined not to be constructed of
AN–26, using a method approved by the
Manager, Seattle Aircraft Certification Office
(ACO).
Note 1: Insulation material that is partmarked with a date of manufacture indicating
that it was manufactured before July 1981 or
VerDate jul<14>2003
15:01 Apr 01, 2005
Jkt 205001
after December 1988 is not constructed of
AN–26.
Parts Installation
(h)(1) As of the effective date of this AD,
no person may install any insulation blanket
constructed of AN–26 on any airplane unless
it has been modified to comply with 14 CFR
25.856(a), in accordance with a method
approved by the Manager, Seattle ACO.
(2) As of six months after the effective date
of this AD, if any insulation blanket is
removed for any reason, it may not be reinstalled unless:
(i) It has been determined not to be
constructed of AN–26 using a method
approved by the Manager, Seattle ACO; or
(ii) It has been modified to comply with 14
CFR 25.856(a), in accordance with a method
approved by the Manager, Seattle ACO.
Alternative Methods of Compliance
(AMOCs)
(i) The Manager, Seattle ACO, has the
authority to approve AMOCs for this AD, if
requested in accordance with the procedures
found in 14 CFR 39.19.
Issued in Renton, Washington, on March
29, 2005.
Kalene C. Yanamura,
Acting Manager, Transport Airplane
Directorate, Aircraft Certification Service.
[FR Doc. 05–6674 Filed 4–1–05; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Office of the Secretary
14 CFR Part 256
[Docket No. OST–2005–20826]
RIN 2105–AD44
Display of Joint Operations in CarrierOwned Computer Reservations
Systems Regulations
Office of the Secretary,
Department of Transportation.
ACTION: Notice of proposed rulemaking.
AGENCY:
SUMMARY: The Department’s rules
currently prohibit each airline that
owns, controls, or operates a computer
reservations system (‘‘CRS’’ or
‘‘system’’) from denying system access
to two or more carriers whose flights
share a single designator code and
discriminating against any carrier
because the carrier uses the same
designator code as another carrier. The
Department recently determined that its
comprehensive rules governing CRS
operations should be terminated
because they are no longer necessary.
The Department is initiating this
proceeding to consider whether it
should also terminate the rules
governing the treatment of code-sharing
PO 00000
Frm 00024
Fmt 4702
Sfmt 4702
airlines by airlines that own, control, or
operate a system.
DATES: Comments must be submitted on
or before May 4, 2005. Reply comments
must be submitted on or before May 19,
2005.
ADDRESSES: You may submit comments
identified by DOT DMS Docket Number
OST–2005–20826 by any of the
following methods:
• Web Site: https://dms.dot.gov.
Follow the instructions for submitting
comments on the DOT electronic docket
site.
• Fax: 1–202–493–2251.
• Mail: Docket Management Facility;
U.S. Department of Transportation, 400
Seventh Street, SW., Nassif Building,
Room PL–401, Washington, DC 20590–
001.
• 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.
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
online instructions for submitting
comments.
Instructions: All submissions must
include the agency name and docket
number or Regulatory Identification
Number (RIN) for this rulemaking. For
detailed instructions on submitting
comments and additional information
on the rulemaking process, see the
Public Participation heading of the
Supplementary Information section of
this document. Note that all comments
received will be posted without change
to https://dms.dot.gov. including any
personal information provided. Please
see the Privacy Act heading under
Regulatory Notices.
Docket: For access to the docket to
read background documents or
comments received, go to https://
dms.dot.gov at any time or to 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.
Due to security procedures in effect
since October 2001 on mail deliveries,
mail received through the Postal Service
may be subject to delays. Commenters
should consider using an express mail
firm to ensure the timely filing of any
comments not submitted electronically
or by hand. Late filed comments will be
considered to the extent possible.
FOR FURTHER INFORMATION CONTACT:
Thomas Ray, Office of the General
Counsel, 400 Seventh St. SW.,
Washington, DC 20590, (202) 366–4731.
Electronic Access: You can view and
download this document by going to the
E:\FR\FM\04APP1.SGM
04APP1
Agencies
[Federal Register Volume 70, Number 63 (Monday, April 4, 2005)]
[Proposed Rules]
[Pages 16986-16990]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-6674]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2005-20836; Directorate Identifier 2005-NM-028-AD]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 727-200 and 727-200F
Series Airplanes; 737-200, 737-200C, 737-300, and 737-400 Series
Airplanes; 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-
200F, 747-300, 747-400, 747SR, and 747SP Series Airplanes; 757-200 and
757-200PF Series Airplanes; and 767-200 and 767-300 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 Boeing transport category airplanes. This proposed AD would
require replacing any insulation blanket constructed of
polyethyleneteraphthalate (PET) film, ORCON Orcofilm[reg] AN-26
(hereafter ``AN-26'') with a new insulation blanket. This proposed AD
is prompted by reports of in-flight and ground fires on certain
airplanes manufactured with insulation blankets covered with AN-26,
which may contribute to the spread of a fire when ignition occurs from
sources such as electrical arcing or sparking. We are proposing this AD
to ensure that insulation blankets constructed of AN-26 are removed
from the fuselage. Such insulation blankets could propagate a fire that
is the result of electrical arcing or sparking.
EFFECTIVE DATES: We must receive comments on this proposed AD by June
3, 2005.
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.
By fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building,
[[Page 16987]]
400 Seventh Street, SW., Washington, DC, between 9 a.m. and 5 p.m.,
Monday through Friday, except Federal holidays.
You can examine the contents of this AD docket on the Internet at
https://dms.dot.gov, or in person at the Docket Management Facility,
U.S. Department of Transportation, 400 Seventh Street SW., room PL-401,
on the plaza level of the Nassif Building, Washington, DC. This docket
number is FAA-2005-20836; the directorate identifier for this docket is
2005-NM-028-AD.
FOR FURTHER INFORMATION CONTACT: Sue Rosanske, Aerospace Engineer,
Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle
Aircraft Certification Office, 1601 Lind Avenue, SW., Renton,
Washington 98055-4056; telephone (425) 917-6448; fax (425) 917-6590.
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 under ADDRESSES. Include ``Docket No. FAA-2005-20836;
Directorate Identifier 2005-NM-028-AD'' in the subject line 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 submitted 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 can review DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78), or you
can visit https://dms.dot.gov.
Examining the Docket
You can 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 DMS receives them.
Background
Based on research experiments and in-service experience in the mid-
1990's, the FAA initiated an investigation into the adequacy of the
existing Bunsen burner flammability criteria for thermal/acoustic
insulation.
Thermal/acoustic insulation is usually constructed in the form of
what is commonly referred to as a ``blanket.'' Insulation blankets are
typically composed of:
1. A batting material generically referred to as fiberglass; and
2. A film covering to contain the batting and to resist moisture
penetration.
Metallized polyethyleneteraphthalate (MPET) and AN-26 are specific
manufacturers' examples of these film covering materials.
Our investigation included large-scale fire testing, as well as
tests for ignitability; these tests covered a broad range of materials.
By the late 1990's, we had concluded that the Bunsen burner test method
required by the existing rules was not adequate. That is, the test
method did not discriminate between materials with desirable and
undesirable flammability characteristics under realistic in-service
conditions. A new certification standard was therefore needed.
In order to develop a new standard, we had to quantify the
potential hazard. This involved additional large scale fire testing and
tests to correlate the large scale tests with a laboratory scale test
method. A necessary element of any new certification test method is
that it must screen out materials that would be considered unacceptable
for future installation because those materials would create the
potential hazard that the new test standard is intended to prevent. The
new test standard was adopted into the regulations and includes changes
to the operating rules for newly manufactured airplanes. (Reference
``Improved Flammability Standards for Thermal/Acoustic Insulation
Materials Used in Transport Category Airplanes'' (68 FR 45046, July 31,
2003).) The operating rule changes become effective in September of
this year.
In developing the new test standard, we also developed criteria by
which materials already in service could be judged as safe to remain in
service. This involved measuring their susceptibility to an ignition
source (such as an electrical arc or sparks) and their tendency to
propagate a fire once ignited.
Materials that are susceptible to ignition by electrical arc or
sparks and that would propagate a fire are considered unsafe. Using
these criteria, we have published airworthiness directives (AD) to
address a particular material. The following ADs require removal of
MPET:
AD 2000-11-01, amendment 39-11749 (65 FR 34321, May 26,
2000), applicable to certain McDonnell Douglas Model DC-9-80 and MD-90-
30 series airplanes, and Model MD-88 airplanes;
AD 2000-11-02, amendment 39-11750 (65 FR 34341, May 26,
2000), applicable to certain McDonnell Douglas Model DC-10-10F, DC-10-
15, DC-10-30, DC-10-30F, and DC-10-40 series airplanes, and Model MD-11
and -11F series airplanes; and
AD 2003-08-10, amendment 39-13122 (68 FR 19326, April 21,
2003), applicable to certain Aerospatiale Model ATR42-500 series
airplanes, and Model ATR72-102, -202, -212, and -212A series airplanes.
At that time, MPET was the only material identified that had
demonstrated the propensity to propagate a fire from an ignition source
such as electrical arcing and sparks. We indicated then that we would
take the same action, should any other materials be identified.
Even though we did extensive testing on a variety of materials, we
could not identify and test every material produced, as the
permutations of material combinations were too extensive to accomplish
such testing in a prudent time frame. As a result, we were not aware of
AN-26 as a unique insulation material until a review of subsequent
service data indicated that this material might not have adequate
flammability resistance. We conducted a review of the service history
and subjected AN-26 material to a variety of tests. In November 2003,
we established that AN-26 could propagate a fire from an electrical
arc. As part of our review, we also worked with industry to explore the
potential ramifications of aging and contamination on material
performance. Opinions differ on the significance of these effects.
After careful consideration of this complex issue, we have concluded
that the flammability characteristics of AN-26 are more a factor of
fundamental material properties than a factor of aging or
contamination.
[[Page 16988]]
Discussion
We have received reports of in-flight and ground fires on certain
Boeing Model 737, 747, 757, and 767 series airplanes that were
manufactured with insulation material covered with AN-26. Investigation
has revealed that AN-26 covered insulation blankets may contribute to
the propagation of a fire. The results of extensive flammability
testing, conducted by the airplane manufacturer and the FAA, revealed
that even though AN-26 met the certification standards in place at the
time of original certification in 1981, this type of insulation
material will propagate a fire when subjected to electrical arcing and
sparks. The FAA used the insulation blankets' response to electrical
arcing and spark testing as the basis for identifying the unsafe
condition with MPET and has determined that these same safety criteria
are applicable to AN-26. In addition, research data have shown that
contamination, such as dust, lint, grease, corrosion-inhibiting
compounds, etc., can increase susceptibility to ignition and flame
propagation.
Insulation blankets constructed of AN-26 installed throughout the
fuselage, if not corrected, could propagate a fire that is the result
of electrical arcing or sparking.
We have determined that Boeing's preferred supplier of insulation
blankets produced blankets constructed of AN-26 between July 1981 and
December 1988. Therefore, it is likely that these blankets are
installed on almost all Boeing airplanes produced during that period,
as listed in the following table:
Boeing Airplane Models Produced Between July 1981 and December 1988
------------------------------------------------------------------------
Model
-------------------------------------------------------------------------
727-200 and 727-200F series airplanes.
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
Eleven Boeing Model 747-400 series airplanes were built in 1988
that are also likely to have AN-26 installed. However, the type
certificate was not amended to include these airplanes until 1989.
Therefore, these airplanes did not have an original Airworthiness
Certificate or original Export Certificate of Airworthiness before
January 1989.
The other affected airplanes were issued an original Airworthiness
Certificate or original Export Certificate of Airworthiness between
July 1981 and December 1988.
Unlike MPET, which is easily distinguishable from other types of
insulation, AN-26 is similar in appearance to other types of insulation
that are acceptable. At this time, there is no documented method for
distinguishing between AN-26 and these other types of insulation.
Other Relevant Service Information
The FAA issued Flight Standards Information Bulletin for
Airworthiness (FSAW) 00-09, ``Special Emphasis Inspection on
Contamination of Thermal/Acoustic Insulation,'' effective September 28,
2000, to ensure that operators have procedures defined in their
approved maintenance programs for the inspection for contamination and
corrective action. The airplane manufacturer also has recently revised
its service letters alerting operators to methods for preventing and
removing contamination.
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. Therefore, we are proposing this AD to
require removing all insulation blankets within the pressurized areas
of the affected airplanes and installing a new insulation blanket
meeting the requirements of Section 25.856(a) of Title 14 of the Code
of Federal Regulations (CFR) (14 CFR 25.856(a)). The proposed AD would
also allow operators to develop methods for distinguishing between
insulation blankets constructed of AN-26 and other materials. If the
FAA's Seattle Aircraft Certification Office (ACO) approves such a
method, operators would not be required to remove blankets they
determine are not constructed of AN-26.
As of the effective date of this AD, paragraph (h)(1) of this
proposed AD would prohibit installation of AN-26 insulation blankets.
14 CFR 91.613(b)(1), 121.312(e)(1), 125.113(c)(1), and 135.170(c)(1)
already prohibit installation of this type of insulation blanket after
September 2, 2005. Some international civil aviation authorities have
not adopted similar regulations. Therefore, this prohibition is
included in this proposed AD to inform them of the need to prevent such
installation.
As of six months after the effective date of this AD, paragraph
(h)(2) of this proposed AD would also prohibit re-installation of any
insulation blanket that has been removed for any reason unless the
insulation blanket either has been determined not to be constructed of
AN-26, or has been modified to comply with 14 CFR 25.856(a). For
example, during normal maintenance, operators frequently remove
insulation to perform inspections and other maintenance actions on
systems and structure located behind the insulation blanket. Under this
proposal, when insulation is removed for this or any other purpose, it
must either be determined not to be constructed of AN-26, or replaced
with insulation meeting 14 CFR 25.856(a). This paragraph would require
operators to correct the identified unsafe condition when they have an
opportunity to do so.
The airplane manufacturer has been developing a proposed
alternative method of compliance (AMOC) that involves modification of
existing AN-26 insulation blankets. This method of compliance may
significantly reduce the number of required replacement blankets and
labor costs. The manufacturer has indicated that the service
information for this method will be available in April 2006. We
anticipate that the manufacturer's approach is similar to AMOCs
approved for ADs 2000-11-01 and 2000-11-02. The criteria that will be
used to evaluate proposed modifications of existing AN-26 insulation
blankets (in-place) can be obtained from the Manager, Seattle ACO, upon
request.
Costs of Compliance
There are about 1,613 airplanes of the affected design in the
worldwide fleet. The following table provides the estimated costs for
U.S. operators to comply with the proposed replacement, if necessary.
The average labor rate is $65 per hour.
[[Page 16989]]
Estimated Costs for Replacement
----------------------------------------------------------------------------------------------------------------
Number of
Parts per U.S.- U.S. fleet Fleet cost per
Model Work hours airplane registered cost year over 6
airplanes years
----------------------------------------------------------------------------------------------------------------
727-200 series airplanes................. 4,623 $42,504 29 $9,946,971 $1,657,829
727-200F and 727-200 series airplanes 1,618 31,878 41 5,618,968 936,495
that have been modified to a freighter
configuration...........................
737-200, 737-200C, 737-300, and 737-400 4,238 38,962 452 142,123,264 23,687,211
series airplanes........................
747-100, 747-100B, 747-100B SUD, 747- 16,951 155,848 19 23,895,597 3,982,600
200B, 747-200C, 747-300, 747-400, 747SR,
and 747SP series airplanes..............
747-200F and 747-200B and 747-300 series 5,933 116,886 16 8,040,496 1,340,083
airplanes that have been modified to a
freighter configuration.................
757-200 series airplanes................. 6,445 59,258 116 55,469,228 9,244,871
757-200PF and 757-200 series airplanes 2,256 44,443 15 2,866,245 477,708
that have been modified to a freighter
configuration...........................
767-200 and 767-300 series airplanes..... 9,246 85,008 114 78,203,772 13,033,962
767-200 and 767-300 series airplanes that 3,236 63,756 29 7,948,784 1,324,797
have been modified to a freighter
configuration...........................
----------------------------------------------------------------------------------------------------------------
Regulatory Flexibility Determination
The Regulatory Flexibility Act of 1980 (RFA) establishes ``as a
principle of regulatory issuance that agencies shall endeavor,
consistent with the objective of the rule and of applicable statutes,
to fit regulatory and informational requirements to the scale of the
business, organizations, and governmental jurisdictions subject to
regulation.'' To achieve that principle, the RFA requires agencies to
solicit and consider flexible regulatory proposals and to explain the
rationale for their actions. The RFA covers a wide-range of small
entities, including small businesses, not-for-profit organizations and
small governmental jurisdictions.
Agencies must perform a review to determine whether a proposed or
final rule will have a significant economic impact on a substantial
number of small entities. If the agency determines that it will, the
agency must prepare a regulatory flexibility analysis as described in
the Act.
The proposed AD would require operators of certain Boeing transport
category airplanes, including about 20 small business operators, to
retrofit their airplanes. We believe that this proposed AD would have a
significant impact on a substantial number of small entities.
Accordingly, an initial regulatory flexibility analysis, as required by
the RFA, is included as part of the Initial Regulatory Analysis that is
in the docket.
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. Would have a significant economic impact on a substantial number
of small entities, and as a result, an initial regulatory flexibility
analysis has been conducted.
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 FAA amends Sec. 39.13 by adding the following new
airworthiness directive (AD):
Boeing: Docket No. FAA-2005-20836; Directorate Identifier 2005-NM-
028-AD.
Comments Due Date
(a) The Federal Aviation Administration (FAA) must receive
comments on this AD action by June 3, 2005.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Boeing airplanes, certificated in any
category, specified in paragraphs (c)(1) and (c)(2) of this AD.
(1) Boeing airplanes listed in Table 1 of this AD, having an
original Airworthiness Certificate or original Export Certificate of
Airworthiness issued between July 1981 and December 1988 inclusive.
Table 1.--Applicability of Certain Airplanes
------------------------------------------------------------------------
Model
-------------------------------------------------------------------------
727-200 and 727-200F series airplanes.
------------------------------------------------------------------------
------------------------------------------------------------------------
[[Page 16990]]
------------------------------------------------------------------------
------------------------------------------------------------------------
------------------------------------------------------------------------
(2) Boeing Model 747-400 series airplanes, serial numbers 23719,
23720, 23814, 23816, 23817, 23818, 23819, 23820, 23999, 24061, and
24062.
Unsafe Condition
(d) This AD was prompted by reports of in-flight and ground
fires on certain airplanes manufactured with insulation blankets
covered with a specific polyethyleneteraphthalate (PET), ORCON
Orcofilm[reg] AN-26 (all variants, including AN-26, AN-26A, and AN-
26B), hereafter referred to as ``AN-26'', which may contribute to
the spread of a fire when ignition occurs from sources such as
electrical arcing or sparking. We are issuing this AD to ensure that
insulation blankets constructed of AN-26 are removed from the
fuselage. Such insulation blankets could propagate a fire that is
the result of electrical arcing or sparking.
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.
Replacement
(f) Except as provided in paragraph (g) of this AD, within 72
months after the effective date of this AD, remove all insulation
blankets from the pressurized areas of the fuselage and install a
new insulation blanket using applicable maintenance manual
procedures. The new insulation blankets must comply with 14 Code of
Federal Regulations (CFR) 25.856(a). The areas where the affected
insulation blankets are installed include, but are not limited to,
the following areas:
(1) Crown area of the airplane;
(2) Areas behind flight deck panels and circuit breaker panels;
(3) Areas behind sidewalls, lavatories, closets, and galleys;
(4) Cargo compartment areas;
(5) Air ducting;
(6) Waste and water tubing; and
(7) Areas attached to the underside of floor panels.
Exception
(g) The actions described in paragraph (f) are not required for
any insulation blanket that is determined not to be constructed of
AN-26, using a method approved by the Manager, Seattle Aircraft
Certification Office (ACO).
Note 1: Insulation material that is part-marked with a date of
manufacture indicating that it was manufactured before July 1981 or
after December 1988 is not constructed of AN-26.
Parts Installation
(h)(1) As of the effective date of this AD, no person may
install any insulation blanket constructed of AN-26 on any airplane
unless it has been modified to comply with 14 CFR 25.856(a), in
accordance with a method approved by the Manager, Seattle ACO.
(2) As of six months after the effective date of this AD, if any
insulation blanket is removed for any reason, it may not be re-
installed unless:
(i) It has been determined not to be constructed of AN-26 using
a method approved by the Manager, Seattle ACO; or
(ii) It has been modified to comply with 14 CFR 25.856(a), in
accordance with a method approved by the Manager, Seattle ACO.
Alternative Methods of Compliance (AMOCs)
(i) The Manager, Seattle ACO, has the authority to approve AMOCs
for this AD, if requested in accordance with the procedures found in
14 CFR 39.19.
Issued in Renton, Washington, on March 29, 2005.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-6674 Filed 4-1-05; 8:45 am]
BILLING CODE 4910-13-P