[Federal Register: October 18, 2006 (Volume 71, Number 201)]
[Rules and Regulations]
[Page 61391-61395]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr18oc06-5]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2000-NM-360-AD; Amendment 39-14789; AD 2006-21-05]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 747-400, 777-200, and 777-
300 Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain Boeing Model 747-400, 777-200, and 777-300 series
airplanes. This AD requires, for certain airplanes, replacing the cell
stack of the flight deck humidifier with a supplier-tested cell stack,
or replacing the cell stack with a blanking plate and subsequently
deactivating the flight deck humidifier. For certain other airplanes,
this AD requires an inspection of the flight deck humidifier to
determine certain part numbers and replacing the cell stack if
necessary. This AD also allows blanking plates to be replaced with cell
stacks. The actions specified by this AD are intended to prevent an
increased pressure drop across the humidifier and consequent reduced
airflow to the flight deck, which could result in the inability to
clear any smoke that might appear in the flight deck. This action is
intended to address the identified unsafe condition.
DATES: Effective November 22, 2006.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of November 22, 2006.
ADDRESSES: The service information referenced in this AD may be
obtained from Boeing Commercial Airplanes, P.O. Box 3707, Seattle,
Washington 98124-2207. This information may be examined at the Federal
Aviation Administration (FAA), Transport Airplane Directorate, Rules
Docket, 1601 Lind Avenue, SW., Renton, Washington.
FOR FURTHER INFORMATION CONTACT: Jeffrey S. Palmer, 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) 917-6481; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal
Aviation Regulations (14 CFR part 39) to include an airworthiness
directive (AD) that is applicable to certain Boeing Model 747-400, 777-
200, and 777-300 series airplanes was published as a second
supplemental notice of proposed rulemaking (NPRM) in the Federal
Register on January 4, 2006 (71 FR 299). That action proposed to
require, for certain airplanes, replacing the cell stack of the flight
deck humidifier with a supplier-tested cell stack, or replacing the
cell stack with a blanking plate and subsequently deactivating the
flight deck humidifier. For certain other airplanes, that action
proposed to require an inspection of the flight deck humidifier to
determine certain part numbers and replacing the cell stack if
necessary. That action also proposed to allow blanking plates to be
replaced with cell stacks. That action also proposed to add airplanes
to the applicability.
Actions Since Second Supplemental NPRM (SNPRM) Was Issued
Since we issued the second SNPRM, Boeing has issued Service
Bulletin 747-21A2414, Revision 3, dated May 12, 2006; and Service
Bulletin 777-21A0048, Revision 3, dated May 12, 2006. Boeing Alert
Service Bulletin 747-21A2414, Revision 2, dated July 7, 2005; and
Boeing Alert Service Bulletin 777-21A0048, Revision 2, dated July 14,
2005, were referenced as the appropriate sources of service information
for doing certain actions proposed in the second SNPRM. Both service
bulletins, Revision 3, contain essentially the same procedures as the
corresponding service bulletins, Revision 2. We have revised this final
rule to refer to Revision 3 of these service bulletins.
We have also added Boeing Alert Service Bulletin 747-21A2414,
Revision 2, to paragraphs (b) and (g) of this final rule and added
Boeing Alert Service Bulletin 777-21A0048, Revision 2, to paragraphs
(e) and (h) of this final rule to allow credit for actions done in
accordance with Revision 2 of the service bulletins.
Operators should note that Boeing Service Bulletin 747-21A2414,
Revision 3, dated May 12, 2006, specifies Group 1 as ``all 747-400
airplanes with Hamilton Sundstrand flight deck humidifier 821486-01.''
However, the correct part number for the humidifier is 821486-1. We
have added Note 1 to this final rule to indicate that Group 1 is
identified as all 747-400 airplanes with Hamilton Sundstrand flight
deck humidifier 821486-1.
Comments
Interested persons have been afforded an opportunity to participate
in the making of this amendment. Due consideration has been given to
the comments received.
Support for the Second SNPRM
Boeing, the manufacturer, concurs with the content of the second
SNPRM.
Request To Remove Airplanes From the Second SNPRM
United Airlines (UAL) does not agree with the contents of the
second SNPRM for the Model 747-400 series airplanes and feels that
regulatory action is not necessary to ensure the intent of the second
SNPRM for these airplanes. UAL states that it took immediate steps to
comply with Boeing and Hamilton Sundstrand service bulletins specified
in the second SNPRM. UAL notes that because the reliability of the
humidifier was extremely poor at the time that the cell stack concern
was identified, the humidifier cell stacks have been
[[Page 61392]]
replaced many times since the year 2000. UAL states that the removed
cell stacks were sent to Hamilton Sundstrand for repair and
modification and that Hamilton Sundstrand is the sole source for repair
and modification. Therefore, UAL concludes that the intent of the
second SNPRM for the 747-400 airplanes can be satisfied by examining
Hamilton Sundstrand's maintenance records for the cell stack.
We disagree. Regulatory action is necessary to ensure that Model
747-400 series airplanes do the actions in this final rule. A review by
the airplane manufacturer of the Hamilton Sundstrand records shows that
about 10 defective humidifier cell stacks are in circulation among the
Model 747-400 fleet. This final rule will prevent any of those
humidifiers, having cell stack part number (P/N) 821482-1, from being
installed as replacements on any airplanes unless ``DEV 13433'' is
marked next to the cell stack P/N. We have not changed the final rule
in this regard.
UAL also does not agree with the contents of the second SNPRM for
the Model 777-200 series airplanes and feels that regulatory action is
not necessary to ensure the intent of the second SNPRM for these
airplanes. UAL states that the airplanes identified as Group 6 in
Boeing Service Bulletin 777-21A0048, Revision 3, dated May 12, 2006,
were added to the service bulletin because the airplanes were scheduled
to have the humidifiers retrofitted as part of the crew rest project;
however, the installation was canceled and no airplanes were
retrofitted with the humidifiers.
We disagree. Regulatory action is necessary to ensure that Model
777-200 series airplanes do the actions in this final rule. A review by
the airplane manufacturer of the Hamilton Sundstrand records shows that
about 14 defective humidifier cell stacks are in circulation among the
Model 777 fleet. This final rule will prevent any of those humidifiers,
having cell stack P/N 822976-2, from being installed as replacements on
any airplanes unless ``DEV 13433'' is marked next to the cell stack P/
N. We have not changed the final rule in this regard.
Request To Allow Compliance With Maintenance Records
UAL also requests that if Model 747-400 series airplanes are not
allowed to be removed from the requirements of the second SNPRM as
requested above, then the only regulatory actions imposed on operators
should be limited to demonstrating compliance through their own
maintenance records.
We partially agree with the commenter. In paragraph (c) of this
final rule we do allow a review of airplane maintenance records to
determine the P/N of the flight deck humidifier instead of doing the
inspection. We have determined that a review of the maintenance records
is also acceptable if it can be determined that the flight deck
humidifier is not installed. We have revised paragraph (c) to state
that ``instead of inspecting the flight deck humidifier, a review of
airplane maintenance records along with any other applicable data is
acceptable if the P/N of the flight deck humidifier can be positively
determined from that review or if it can be positively determined that
the flight deck humidifier is not installed on the airplane.''
Request To Allow Equivalent Blanking Plate Installation
UAL also requests that we consider the blanking plate installation
and humidifier system deactivation done in accordance with Boeing
Service Bulletin 777-21-0087, dated June 17, 2004; and Hamilton
Sundstrand Service Bulletin 816086-21-01, dated March 15, 2000; as
equivalent to the blanking plate installation done in accordance with
Boeing Alert Service Bulletin 777-21A0048, Revision 2, dated July 14,
2005 (specified in paragraph (f) of the second SNPRM).
The commenter states that it has deactivated the humidifiers and
replaced the cell stacks with blanking plates on all Group 7 airplanes
identified in Boeing Alert Service Bulletin 777-21-0048, registration
numbers 09UA and 16UA-29UA, by doing the actions in Boeing Service
Bulletin 777-21-0087 and Hamilton Sundstrand Service Bulletin 816086-
21-01. The commenter also notes that the airplane having registration
number 09UA, was delivered with a deactivated humidifier and only
needed modification by doing the blanking plate installation per
Hamilton Sundstrand Service Bulletin 816086-21-01.
We agree with the commenter. We have revised paragraph (f)(2)(ii)
of this final rule to give credit for airplanes on which the
replacement and deactivation are done in accordance with Boeing Service
Bulletin 777-21-0087 and Hamilton Sundstrand Service Bulletin 816086-
21-01 for those Group 7 airplanes listed in Boeing Service Bulletin
777-21-0087, dated June 17, 2004.
We have also determined that a review of the maintenance records is
acceptable instead of the inspection specified in paragraph (f) of this
final rule if it can be determined that the flight deck humidifier is
not installed. We have revised paragraph (f) to state that ``instead of
inspecting the flight deck humidifier, a review of airplane maintenance
records along with any other applicable data is acceptable if the P/N
of the flight deck humidifier can be positively determined from that
review or if it can be positively determined that the flight deck
humidifier is not installed on the airplane.''
Conclusion
After careful review of the available data, including the comments
noted above, the FAA has determined that air safety and the public
interest require the adoption of the rule with the changes described
previously. The FAA has determined that these changes will neither
increase the economic burden on any operator nor increase the scope of
the AD.
Cost Impact
There are approximately 176 airplanes of the affected design in the
worldwide fleet. The FAA estimates that this AD affects 29 airplanes of
U.S. registry. The cost per airplane ranges between $390 and $6,248 per
airplane, depending on the actions chosen by the operator. The fleet
cost estimate does not exceed $181,192.
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Work Hourly Cost per
Model/series Action hours rate Parts cost airplane
----------------------------------------------------------------------------------------------------------------
747-400, 777-200, 777-300............ Inspect flight deck 1 $65 $0 $65
humidifier for P/N and
inspect flight deck
humidifier cell stack for P/
N.
747-400.............................. Replace cell stack with new 3 65 5,100 5,295
or supplier-tested cell
stack.
747-400.............................. Replace cell stack with 5 65 0 325
blanking plate and
deactivate humidifier.
777-200, 777-300..................... Replace cell stack with 3 65 0 195
blanking plate.
[[Page 61393]]
777-200, 777-300..................... Replace cell stack with new 3 65 6,053 6,248
or supplier-tested cell
stack.
777-200, 777-300..................... Replace blanking plate with 1 65 6,053 6,118
supplier-tested cell stack.
----------------------------------------------------------------------------------------------------------------
The cost impact figures discussed above are based on assumptions
that no operator has yet accomplished any of the requirements of this
AD action, and that no operator would accomplish those actions in the
future if this AD were not adopted. The cost impact figures discussed
in AD rulemaking actions represent only the time necessary to perform
the specific actions actually required by the AD. These figures
typically do not include incidental costs, such as the time required to
gain access and close up, planning time, or time necessitated by other
administrative actions.
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 Impact
The regulations adopted herein will not have a substantial direct
effect on the States, on the relationship between the national
Government and the States, or on the distribution of power and
responsibilities among the various levels of government. Therefore, it
is determined that this final rule does not have federalism
implications under Executive Order 13132.
For the reasons discussed above, I certify that this action (1) is
not a ``significant regulatory action'' under Executive Order 12866;
(2) is not a ``significant rule'' under DOT Regulatory Policies and
Procedures (44 FR 11034, February 26, 1979); and (3) will not have a
significant economic impact, positive or negative, on a substantial
number of small entities under the criteria of the Regulatory
Flexibility Act. A final evaluation has been prepared for this action
and it is contained in the Rules Docket. A copy of it may be obtained
from the Rules Docket at the location provided under the caption
ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration amends part 39 of
the Federal Aviation Regulations (14 CFR part 39) as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
0
2. Section 39.13 is amended by adding the following new airworthiness
directive:
2006-21-05 Boeing: Amendment 39-14789. Docket 2000-NM-360-AD.
Applicability: Model 747-400, 777-200, and 777-300 series
airplanes, certificated in any category; as identified in Boeing
Service Bulletin 747-21A2414, Revision 3, dated May 12, 2006; and
Boeing Service Bulletin 777-21A0048, Revision 3, dated May 12, 2006.
Compliance: Required as indicated, unless accomplished
previously.
To prevent an increased pressure drop across the humidifier and
consequent reduced airflow to the flight deck, which could result in
the inability to clear any smoke that might appear in the flight
deck, accomplish the following:
Cell Stack Replacement: Model 747-400 Series Airplanes
(a) For Model 747-400 series airplanes identified as Group 1 in
Boeing Service Bulletin 747-21A2414, Revision 3, dated May 12, 2006:
Within 90 days after the effective date of this AD, do the
replacement specified in paragraph (a)(1) or (a)(2) of this AD. For
flight deck humidifiers with a blanking plate: If the blanking plate
is removed and a new or supplier-tested cell stack is installed, the
replacement must be done in accordance with the Accomplishment
Instructions of Hamilton Sundstrand Service Bulletins 821486-21-01,
dated March 15, 2000; and after the replacement, the flight deck
humidifier may be activated in accordance with the Accomplishment
Instructions of Boeing Service Bulletin 747-21-2405, Revision 4,
dated July 29, 1999.
Note 1: Boeing Service Bulletin 747-21A2414, Revision 3, dated
May 12, 2006, specifies Group 1 as ``all 747-400 airplanes with
Hamilton Sundstrand flight deck humidifier 821486-01.'' The correct
part number (P/N) for the humidifier is 821486-1.
(1) Replace the cell stack of the flight deck humidifier with a
supplier-tested cell stack, in accordance with Part 1 of the
Accomplishment Instructions of Boeing Service Bulletin 747-21A2414,
Revision 3, dated May 12, 2006.
(2) Replace the cell stack of the flight deck humidifier with a
blanking plate and, before further flight, deactivate the flight
deck humidifier, in accordance with Part 2 of the Accomplishment
Instructions of Boeing Service Bulletin 747-21A2414, Revision 3,
dated May 12, 2006.
Note 2: Boeing Service Bulletin 747-21A2414, Revision 3, dated
May 12, 2006, refers to Boeing Service Bulletin 747-21-2405,
Revision 4, dated July 29, 1999, as an additional source of service
information for deactivating the humidifier.
Note 3: Boeing Service Bulletin 747-21A2414, Revision 3, dated
May 12, 2006, refers to Hamilton Sundstrand Service Bulletin 821486-
21-01, dated March 15, 2000, as an additional source of service
information for the cell stack replacements.
(b) Replacement of the cell stack before the effective date of
this AD in accordance with Boeing Alert Service Bulletin 747-
21A2414, dated April 13, 2000; Revision 1, dated October 26, 2000;
or Revision 2, dated July 7, 2005; is acceptable for compliance with
the applicable requirements of paragraphs (a)(1) and (a)(2) of this
AD.
Inspections/Records Review: Model 747-400 Series Airplanes
(c) For Model 747-400 series airplanes identified as Groups 2
and 3 in Boeing Service Bulletin 747-21A2414, Revision 3, dated May
12, 2006: Within 90 days after the effective date of this AD,
inspect the flight deck humidifier to determine whether P/N 821486-1
is installed, in accordance with Part 3 of the Accomplishment
Instructions of Boeing Service Bulletin 747-21A2414, Revision 3,
dated May 12, 2006. Instead of inspecting the flight deck
humidifier, a
[[Page 61394]]
review of airplane maintenance records along with any other
applicable data is acceptable if the P/N of the flight deck
humidifier can be positively determined from that review or if it
can be positively determined that the flight deck humidifier is not
installed on the airplane.
(1) If a P/N other than P/N 821486-1 is installed or if the
flight deck humidifier is not installed, no further action is
required by this paragraph.
(2) If P/N 821486-1 is installed, inspect the flight deck
humidifier cell stack to determine whether P/N 821482-1 is installed
and ``DEV 13433'' is not marked next to the cell stack P/N, in
accordance with Part 3 of the Accomplishment Instructions of the
service bulletin. Instead of inspecting the flight deck humidifier
cell stack, a review of airplane maintenance records is acceptable
if the P/N, including whether ``DEV 13433'' is marked next to the P/
N, of the flight deck humidifier cell stack can be positively
determined from that review.
(i) If the cell stack has P/N 821482-2 or 1003111-2, or if ``DEV
13433'' is marked next to P/N 821482-1, no further action is
required by this paragraph.
(ii) If the cell stack has P/N 821482-1 and does not have ``DEV
13433'' marked next to the cell stack P/N: Before further flight, do
the replacement specified in paragraph (a) of this AD.
Cell Stack Replacement: Model 777-200 and -300 Series Airplanes
(d) For Model 777-200 and 777-300 series airplanes identified as
Groups 1 through 5 in Boeing Service Bulletin 777-21A0048, Revision
3, dated May 12, 2006: Within 90 days after the effective date of
this AD, do the replacement specified in paragraph (d)(1) or (d)(2)
of this AD. For flight deck humidifiers with a blanking plate: If a
blanking plate is removed and a new or supplier-tested cell stack
installed, the cell stack installation must be done in accordance
with Part 3 of the Accomplishment Instructions of Boeing Service
Bulletin 777-21A0048, Revision 3, dated May 12, 2006; and after the
installation, the humidifier system may be activated in accordance
with Accomplishment Instructions of Boeing Service Bulletin 777-21-
0035, Revision 1, dated October 19, 2000.
(1) Replace the cell stack with a blanking plate, in accordance
with Part 1 of the Accomplishment Instructions of Boeing Service
Bulletin 777-21A0048, Revision 3, dated May 12, 2006; and, before
further flight, deactivate the humidifier system in accordance with
a method approved by the Manager, Seattle Aircraft Certification
Office (ACO), FAA, or in accordance with data meeting the
certification basis of the airplane approved by an Authorized
Representative for the Boeing Commercial Airplanes Delegation Option
Authorization who has been authorized by the Manager, Seattle ACO,
to make those findings. For a deactivation method to be approved,
the deactivation must meet the certification basis of the airplane,
and the approval must specifically reference this AD.
(2) Replace the cell stack with a supplier-tested cell stack, in
accordance with Part 2 of the Accomplishment Instructions of Boeing
Service Bulletin 777-21A0048, Revision 3, dated May 12, 2006.
Note 4: Boeing Service Bulletin 777-21A0048, Revision 3, dated
May 12, 2006, refers to Hamilton Sundstrand Service Bulletin 816086-
21-01, dated March 15, 2000, as an additional source of service
information for the cell stack replacement.
(e) Replacement of the cell stack before the effective date of
this AD in accordance with Boeing Service Bulletin 777-21A0048,
Revision 1, dated September 7, 2000; or Boeing Alert Service
Bulletin 777-21A0048, Revision 2, dated July 14, 2005; is acceptable
for compliance with the applicable requirements of paragraphs (d)(1)
and (d)(2) of this AD.
Inspections/Records Review: Model 777-200 and -300 Series Airplanes
(f) For Model 777-200 and 777-300 series airplanes identified as
Groups 6 and 7 in Boeing Service Bulletin 777-21A0048, Revision 3,
dated May 12, 2006: Within 90 days after the effective date of this
AD, inspect the flight deck humidifier to determine if it is P/N
816086-1, in accordance with Part 4 of the Accomplishment
Instructions of Boeing Service Bulletin 777-21A0048, Revision 3,
dated May 12, 2006. Instead of inspecting the flight deck
humidifier, a review of airplane maintenance records along with any
other applicable data is acceptable if the P/N of the flight deck
humidifier can be positively determined from that review or if it
can be positively determined that the flight deck humidifier is not
installed on the airplane.
(1) If a P/N other than P/N 816086-1 is installed or if the
flight deck humidifier is not installed, no further action is
required by this paragraph.
(2) If P/N 816086-1 is installed, inspect the flight deck
humidifier cell stack to determine whether P/N 822976-2 is installed
and ``DEV 13433'' is not marked next to the cell stack P/N, in
accordance with Part 4 of the Accomplishment Instructions of the
service bulletin. Instead of inspecting the flight deck humidifier
cell stack, a review of airplane maintenance records is acceptable
if the P/N, including whether ``DEV 13433'' is marked next to the P/
N, of the flight deck humidifier cell stack can be positively
determined from that review.
(i) If the cell stack has P/N 822976-3 or 1003111-1, or if ``DEV
13433'' is marked next to P/N 822976-2, no further action is
required by this paragraph.
(ii) If the cell stack has P/N 822976-2 and does not have ``DEV
13433'' marked next to the cell stack P/N, before further flight, do
the replacement specified in paragraph (d) of this AD. Doing the
replacement of the cell stack with a blanking plate, in accordance
with paragraph 3.A. of the Accomplishment Instructions of Hamilton
Sundstrand Service Bulletin 816086-21-01, dated March 15, 2000; and
the deactivation of the humidifier system, in accordance with the
Accomplishment Instructions of Boeing Service Bulletin 777-21-0087,
dated June 17, 2004; is acceptable for compliance with paragraph
(d)(1) of this AD for those Group 7 airplanes listed in Boeing
Service Bulletin 777-21-0087, dated June 17, 2004.
Actions Accomplished According to Previous Issue of Service Bulletin
(g) Inspections accomplished before the effective date of this
AD in accordance with Boeing Alert Service Bulletin 747-21A2414,
Revision 2, dated July 7, 2005, are considered acceptable for
compliance with the corresponding action specified in paragraph (c)
of this AD.
(h) Inspections accomplished before the effective date of this
AD in accordance with Boeing Alert Service Bulletin 777-21A0048,
Revision 2, dated July 14, 2005, are considered acceptable for
compliance with the corresponding action specified in paragraph (f)
of this AD.
Parts Installation
(i) On Model 747-400 series airplanes: As of the effective date
of this AD, no person may install a flight deck humidifier cell
stack having P/N 821482-1, unless ``DEV 13433'' is also marked next
to the cell stack P/N.
(j) On Model 777-200 and 777-300 series airplanes: As of the
effective date of this AD, no person may install a flight deck
humidifier cell stack having P/N 822976-2, unless ``DEV 13433'' is
also marked next to the cell stack P/N.
Alternative Methods of Compliance
(k)(1) In accordance with 14 CFR 39.19, the Manager, Seattle
ACO, is authorized to approve alternative methods of compliance for
this AD.
(2) Before using any AMOC approved in accordance with 14 CFR
39.19 on any airplane to which the AMOC applies, notify the
appropriate principal inspector in the FAA Flight Standards
Certificate Holding District Office.
Incorporation by Reference
(l) Unless otherwise specified in this AD, the actions must be
done in accordance with the applicable service bulletins listed in
Table 1 of this AD. This incorporation by reference was approved by
the Director of the Federal Register in accordance with 5 U.S.C.
552(a) and 1 CFR part 51. To get copies of this service information,
contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle,
Washington 98124-2207. To inspect copies of this service
information, go to the FAA, Transport Airplane Directorate, 1601
Lind Avenue, SW., Renton, Washington. For information on the
availability of this material at the NARA, call (202) 741-6030, or
go to http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
[[Page 61395]]
Table 1.--Material Incorporated by Reference
----------------------------------------------------------------------------------------------------------------
Service Bulletin Revision level Date
----------------------------------------------------------------------------------------------------------------
Boeing Service Bulletin 747-21A2414... 3............................. May 12, 2006.
Boeing Service Bulletin 747-21-2405... 4............................. July 29, 1999.
Boeing Service Bulletin 777-21A0048... 3............................. May 12, 2006.
Boeing Service Bulletin 777-21-0035... 1............................. October 19, 2000.
Boeing Service Bulletin 777-21-0087... Original...................... June 17, 2004.
Hamilton Sundstrand Service Bulletin Original...................... March 15, 2000.
816086-21-01.
Hamilton Sundstrand Service Bulletin Original...................... March 15, 2000.
821486-21-01.
----------------------------------------------------------------------------------------------------------------
Effective Date
(m) This amendment becomes effective on November 22, 2006.
Issued in Renton, Washington, on October 6, 2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E6-17187 Filed 10-17-06; 8:45 am]
BILLING CODE 4910-13-P