Airworthiness Directives; Boeing Model 777-200 and 777-300 Series Airplanes, 2980-2982 [05-991]

Download as PDF 2980 Federal Register / Vol. 70, No. 12 / Wednesday, January 19, 2005 / Proposed Rules Conclusion This action affects only certain novel or unusual design features on the Mooney models M20 (K, M, R, and S). It is not a rule of general applicability, and it affects only the applicant who applied to the FAA for approval of these features on the airplane. List of Subjects in 14 CFR Part 23 Aircraft, Aviation safety, Signs and symbols. Citation The authority citation for these special conditions is as follows: Authority: 49 U.S.C. 106(g), 40113 and 44701; 14 CFR 21.16 and 21.101; and 14 CFR 11.38 and 11.19. The Proposed Special Conditions The FAA has determined that this project will be accomplished on the basis of not lowering the current level of safety for the Mooney models M20 (K, M, R, and S) occupant restraint system. Accordingly, the FAA proposes the following special conditions as part of the type certification basis for the Mooney models M20 (K, M, R, and S), as modified by AMSAFE, Inc. Inflatable Three-Point Restraint Safety Belt With an Integrated Airbag Device on Mooney Models M20 (K, M, R, and S) 1. It must be shown that the inflatable restraint will deploy and provide protection under crash conditions. Compliance will be demonstrated using the dynamic test condition specified in § 23.562, which may be modified as follows: a. The peak longitudinal deceleration may be reduced; however, the onset rate of the deceleration must be equal to or greater than the crash pulse identified in § 23.562. b. The peak longitudinal deceleration must be above the deployment threshold of the crash sensor and equal to or greater than the forward static design longitudinal load factor required by the original certification basis of the airplane. c. The means of protection must take into consideration a range of stature from a 5th percentile female to a 95th percentile male. The inflatable restraint must provide a consistent approach to energy absorption throughout the range. 2. The inflatable restraint must provide adequate protection for each occupant. In addition, unoccupied seats that have an active restraint must not constitute a hazard to any occupant. 3. The design must prevent the inflatable restraint from either being incorrectly buckled or incorrectly VerDate jul<14>2003 15:09 Jan 18, 2005 Jkt 205001 installed, or both, such that the airbag would not properly deploy. Alternatively, it must be shown that such deployment is not hazardous to the occupant and will provide the required protection. 4. It must be shown that the inflatable restraint system is not susceptible to inadvertent deployment as a result of wear and tear or the inertial loads resulting from in-flight or ground maneuvers (including gusts and hard landings) that are likely to be experienced in service. 5. It must be extremely improbable for an inadvertent deployment of the restraint system to occur, or an inadvertent deployment must not impede the pilot’s ability to maintain control of the airplane or cause an unsafe condition (or hazard to the airplane). In addition, a deployed inflatable restraint must be at least as strong as a Technical Standard Order (C114) certificated belt and shoulder harness. 6. It must be shown that deployment of the inflatable restraint system is not hazardous to the occupant or result in injuries that could impede rapid egress. This assessment should include occupants whose restraint is loosely fastened. 7. It must be shown that an inadvertent deployment that could cause injury to a standing or sitting person is improbable. In addition, the restraint must also provide suitable visual warnings that would alert rescue personnel to the presence of an inflatable restraint system. 8. It must be shown that the inflatable restraint will not impede rapid egress of the occupants 10 seconds after its deployment. 9. For the purposes of complying with HIRF and lightning requirements, the inflatable restraint system is considered a critical system since its deployment could have a hazardous effect on the airplane. 10. It must be shown that the inflatable restraints will not release hazardous quantities of gas or particulate matter into the cabin. 11. The inflatable restraint system installation must be protected from the effects of fire such that no hazard to occupants will result. 12. There must be a means to verify the integrity of the inflatable restraint activation system before each flight or it must be demonstrated to reliably operate between inspection intervals. 13. A life limit must be established for appropriate system components. 14. Qualification testing of the internal firing mechanism must be performed at vibration levels PO 00000 Frm 00018 Fmt 4702 Sfmt 4702 appropriate for a general aviation airplane. Issued in Kansas City, Missouri, on January 11, 2005. Michael K. Dahl, Acting Manager, Small Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–973 Filed 1–18–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2005–20081; Directorate Identifier 2004–NM–132–AD] RIN 2120–AA64 Airworthiness Directives; Boeing Model 777–200 and 777–300 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 Model 777–200 and –300 series airplanes. This proposed AD would require modification of the operational program software (OPS) of the air data inertial reference unit (ADIRU). This proposed AD is prompted by a report of the display of erroneous heading information to the pilot due to a defect in the OPS of the ADIRU. We are proposing this AD to prevent the display of erroneous heading information to the pilot, which could result in loss of the main sources of attitude data, consequent high pilot workload, and subsequent deviation from the intended flight path. DATES: We must receive comments on this proposed AD by March 7, 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, E:\FR\FM\19JAP1.SGM 19JAP1 Federal Register / Vol. 70, No. 12 / Wednesday, January 19, 2005 / Proposed Rules 400 Seventh Street SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this proposed AD, contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207. 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– 20081; the directorate identifier for this docket is 2004–NM–132–AD. FOR FURTHER INFORMATION CONTACT: Paul Feider, Aerospace Engineer, Systems and Equipment Branch, ANM–130S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 917–6467; 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– 2005–20081; Directorate Identifier 2004–NM–132–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 website, 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 VerDate jul<14>2003 15:09 Jan 18, 2005 Jkt 205001 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. Discussion We have received a report of the display of erroneous heading information to the pilot due to a defect in the operational program software (OPS) of the air data inertial reference unit (ADIRU) on certain Model 777 series airplanes. Investigation revealed a timing defect in the ADIRU Auto Navigation Realign Logic, which could potentially result in the use of a ‘‘stale’’ update, which would then produce incorrect heading information with a variable error magnitude. This condition, if not corrected, could result in loss of the main sources of attitude data, consequent high pilot workload, and subsequent deviation from the intended flight path. Relevant Service Information We have reviewed Boeing Service Bulletin 777–34A0082, Revision 1, dated December 19, 2002. The service bulletin describes procedures for modification of the OPS of the ADIRU. The modification includes installing new OPS in the flight compartment at the maintenance access terminal (MAT), or, as an option, replacing the hard drive for the existing OPS in the MAT and/or the Portable MAT. Accomplishing the actions specified in the service information is intended to adequately address the unsafe condition. FAA’s Determination and Requirements of the Proposed AD We have evaluated all pertinent information and identified an unsafe condition that is likely to exist or develop on other airplanes of this same type design. Therefore, we are proposing this AD, which would require accomplishing the actions specified in the service information described previously, except as discussed under ‘‘Difference Between the Proposed AD and Service Information.’’ Difference Between the Proposed AD and Service information Although the service information recommends accomplishing the modification ‘‘at the earliest opportunity when manpower, parts, and facilities are available,’’ we have determined that this imprecise compliance time would not address the identified unsafe PO 00000 Frm 00019 Fmt 4702 Sfmt 4702 2981 condition in a timely manner. However, the manufacturer has recommended that the compliance time not exceed 6 months. In developing an appropriate compliance time for this AD, we considered not only the manufacturer’s recommendation, but the degree of urgency associated with addressing the subject unsafe condition, the average utilization of the affected fleet, and the time necessary to perform the modification. In light of all of these factors, we find a compliance time of 6 months for completing the required modification to be warranted, in that it represents an appropriate interval of time for affected airplanes to continue to operate without compromising safety. Costs of Compliance There are about 409 airplanes of the affected design in the worldwide fleet. This proposed AD would affect about 130 airplanes of U.S. registry. The proposed actions would take about 1 work hour per airplane, at an average labor rate of $65 per work hour. Required parts would be free of charge. Based on these figures, the estimated cost of the proposed AD for U.S. operators is $8,450, or $65 per airplane. Authority for This Rulemaking The FAA’s authority to issue rules regarding aviation safety is found in Title 49 of the United States Code. 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. This rulemaking is promulgated 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 proposed AD. Regulatory Findings We have determined that this proposed AD will not have federalism implications under Executive Order 13132. This proposed AD 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. E:\FR\FM\19JAP1.SGM 19JAP1 2982 Federal Register / Vol. 70, No. 12 / Wednesday, January 19, 2005 / Proposed Rules For the reasons discussed above, I certify that the proposed regulation: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; 2. Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. We prepared a regulatory evaluation of the estimated costs to comply with this proposed AD. 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: the compliance times specified, unless the actions have already been done. Modification (f) Within 6 months after the effective date of this AD: Modify the OPS of the ADIRU by doing the applicable actions specified in the Accomplishment Instructions of Boeing Service Bulletin 777–34A0082, Revision 1, dated December 19, 2002. Alternative Methods of Compliance (AMOCs) (g) The Manager, Seattle 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. Issued in Renton, Washington, on January 7, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–991 Filed 1–18–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION PART 39—AIRWORTHINESS DIRECTIVES Federal Aviation Administration 1. The authority citation for part 39 continues to read as follows: 14 CFR Part 39 Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 RIN 2120–AA64 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): Boeing: Docket No. FAA–2005–20081; Directorate Identifier 2004–NM–132–AD. Comments Due Date (a) The Federal Aviation Administration (FAA) must receive comments on this AD action by March 7, 2005. Affected ADs (b) None. Applicability (c) This AD applies to Boeing Model 777– 200 and –300 series airplanes, certificated in any category; as listed in Boeing Service Bulletin 777–34A0082, Revision 1, dated December 19, 2002. Unsafe Condition (d) This AD was prompted by a report of the display of erroneous heading information to the pilot due to a defect in the operational program software (OPS) of the air data inertial reference unit (ADIRU). The Federal Aviation Administration is issuing this AD to prevent the display of erroneous heading information to the pilot, which could result in loss of the main sources of attitude data, consequent high pilot workload, and subsequent deviation from the intended flight path. Compliance (e) You are responsible for having the actions required by this AD performed within VerDate jul<14>2003 15:09 Jan 18, 2005 [Docket No. FAA–2005–20080; Directorate Identifier 2003–NM–193–AD] Jkt 205001 Airworthiness Directives; Various Aircraft Equipped With Honeywell Primus II RNZ–850/–851 Integrated Navigation Units Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: The FAA proposes to supersede an existing airworthiness directive (AD) that applies to various aircraft equipped with a certain Honeywell Primus II RNZ–850/–851 Integrated Navigation Unit (INU). The existing AD requires inspecting to determine whether Mod L has been done on the Honeywell Primus II NV850 Navigation Receiver Module (NRM), which is part of the INU. In lieu of this inspection, or for aircraft with an NRM having Mod L, the existing AD requires revising the aircraft flight manual to include new limitations for instrument landing system approaches. For aircraft equipped with an NRM having Mod L or aircraft not inspected previously, this proposed AD would require inspecting to determine whether certain other modifications have been done on the NRM; and doing related investigative, corrective, and other specified actions, PO 00000 Frm 00020 Fmt 4702 Sfmt 4702 as applicable. This proposed AD is prompted by reports of erroneous glide slope indications on certain aircraft equipped with subject INUs. We are proposing this AD to ensure that the flightcrew has an accurate glideslope deviation indication. An erroneous glideslope deviation indication could lead to the aircraft making an approach off the glideslope, which could result in impact with an obstacle or terrain. DATES: We must receive comments on this proposed AD by March 7, 2005. ADDRESSES: Use one of the following addresses to submit comments on this proposed AD. • DOT Docket Web site: Go to http//dms.dot.gov and follow the instructions for sending your comments electronically. • Government-wide rulemaking Web site: Go to https://www.regulations.gov and follow the instructions for sending your comments electronically. • Mail: Docket Management Facility; U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, Room PL–401, Washington, DC 20590. • Fax: (202) 493–2251. • Hand Delivery: Room PL–401 on the plaza level of the Nassif Building, 400 Seventh Street SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this proposed AD, contact Honeywell Aerospace Electronic Systems, CES– Phoenix, P.O. Box 2111, Phoenix, Arizona 85036–1111. 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. FOR FURTHER INFORMATION CONTACT: J. Kirk Baker, Aerospace Engineer, Systems and Equipment Branch, ANM– 130L, FAA, Los Angeles Aircraft Certification Office, 3960 Paramount Boulevard, Lakewood, California 90712–4137; telephone (562) 627–5345; fax (562) 627–5210. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to submit any relevant written data, views, or arguments regarding this proposed AD. Send your comments to an address listed under ADDRESSES. Include ‘‘Docket No. FAA– 2005–20080; Directorate Identifier 2003–NM–193–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will E:\FR\FM\19JAP1.SGM 19JAP1

Agencies

[Federal Register Volume 70, Number 12 (Wednesday, January 19, 2005)]
[Proposed Rules]
[Pages 2980-2982]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-991]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2005-20081; Directorate Identifier 2004-NM-132-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 777-200 and 777-300 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 Model 777-200 and -300 series airplanes. This 
proposed AD would require modification of the operational program 
software (OPS) of the air data inertial reference unit (ADIRU). This 
proposed AD is prompted by a report of the display of erroneous heading 
information to the pilot due to a defect in the OPS of the ADIRU. We 
are proposing this AD to prevent the display of erroneous heading 
information to the pilot, which could result in loss of the main 
sources of attitude data, consequent high pilot workload, and 
subsequent deviation from the intended flight path.

DATES: We must receive comments on this proposed AD by March 7, 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 2981]]

400 Seventh Street SW., Washington, DC, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact 
Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-
2207.
    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-2005-20081; the directorate identifier for this docket is 
2004-NM-132-AD.

FOR FURTHER INFORMATION CONTACT: Paul Feider, Aerospace Engineer, 
Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft 
Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055-
4056; telephone (425) 917-6467; 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-2005-20081; 
Directorate Identifier 2004-NM-132-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 website, 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.

Discussion

    We have received a report of the display of erroneous heading 
information to the pilot due to a defect in the operational program 
software (OPS) of the air data inertial reference unit (ADIRU) on 
certain Model 777 series airplanes. Investigation revealed a timing 
defect in the ADIRU Auto Navigation Realign Logic, which could 
potentially result in the use of a ``stale'' update, which would then 
produce incorrect heading information with a variable error magnitude. 
This condition, if not corrected, could result in loss of the main 
sources of attitude data, consequent high pilot workload, and 
subsequent deviation from the intended flight path.

Relevant Service Information

    We have reviewed Boeing Service Bulletin 777-34A0082, Revision 1, 
dated December 19, 2002. The service bulletin describes procedures for 
modification of the OPS of the ADIRU. The modification includes 
installing new OPS in the flight compartment at the maintenance access 
terminal (MAT), or, as an option, replacing the hard drive for the 
existing OPS in the MAT and/or the Portable MAT. Accomplishing the 
actions specified in the service information is intended to adequately 
address the unsafe condition.

FAA's Determination and Requirements of the Proposed AD

    We have evaluated all pertinent information and identified an 
unsafe condition that is likely to exist or develop on other airplanes 
of this same type design. Therefore, we are proposing this AD, which 
would require accomplishing the actions specified in the service 
information described previously, except as discussed under 
``Difference Between the Proposed AD and Service Information.''

Difference Between the Proposed AD and Service information

    Although the service information recommends accomplishing the 
modification ``at the earliest opportunity when manpower, parts, and 
facilities are available,'' we have determined that this imprecise 
compliance time would not address the identified unsafe condition in a 
timely manner. However, the manufacturer has recommended that the 
compliance time not exceed 6 months. In developing an appropriate 
compliance time for this AD, we considered not only the manufacturer's 
recommendation, but the degree of urgency associated with addressing 
the subject unsafe condition, the average utilization of the affected 
fleet, and the time necessary to perform the modification. In light of 
all of these factors, we find a compliance time of 6 months for 
completing the required modification to be warranted, in that it 
represents an appropriate interval of time for affected airplanes to 
continue to operate without compromising safety.

Costs of Compliance

    There are about 409 airplanes of the affected design in the 
worldwide fleet. This proposed AD would affect about 130 airplanes of 
U.S. registry. The proposed actions would take about 1 work hour per 
airplane, at an average labor rate of $65 per work hour. Required parts 
would be free of charge. Based on these figures, the estimated cost of 
the proposed AD for U.S. operators is $8,450, or $65 per airplane.

Authority for This Rulemaking

    The FAA's authority to issue rules regarding aviation safety is 
found in Title 49 of the United States Code. 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.
    This rulemaking is promulgated 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 
proposed AD.

Regulatory Findings

    We have determined that this proposed AD will not have federalism 
implications under Executive Order 13132. This proposed AD 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.

[[Page 2982]]

    For the reasons discussed above, I certify that the proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); and
    3. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.
    We prepared a regulatory evaluation of the estimated costs to 
comply with this proposed AD. 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-2005-20081; Directorate Identifier 2004-NM-
132-AD.

Comments Due Date

    (a) The Federal Aviation Administration (FAA) must receive 
comments on this AD action by March 7, 2005.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Boeing Model 777-200 and -300 series 
airplanes, certificated in any category; as listed in Boeing Service 
Bulletin 777-34A0082, Revision 1, dated December 19, 2002.

Unsafe Condition

    (d) This AD was prompted by a report of the display of erroneous 
heading information to the pilot due to a defect in the operational 
program software (OPS) of the air data inertial reference unit 
(ADIRU). The Federal Aviation Administration is issuing this AD to 
prevent the display of erroneous heading information to the pilot, 
which could result in loss of the main sources of attitude data, 
consequent high pilot workload, and subsequent deviation from the 
intended flight path.

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.

Modification

    (f) Within 6 months after the effective date of this AD: Modify 
the OPS of the ADIRU by doing the applicable actions specified in 
the Accomplishment Instructions of Boeing Service Bulletin 777-
34A0082, Revision 1, dated December 19, 2002.

Alternative Methods of Compliance (AMOCs)

    (g) The Manager, Seattle 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.

    Issued in Renton, Washington, on January 7, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-991 Filed 1-18-05; 8:45 am]
BILLING CODE 4910-13-P
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