Airworthiness Directives; Various Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) Units, 81512-81514 [2010-32658]

Download as PDF 81512 Federal Register / Vol. 75, No. 248 / Tuesday, December 28, 2010 / Proposed Rules TABLE 1—ADDITIONAL SOURCES OF GUIDANCE FOR REPLACING THE MAIN TANK BOOST PUMP RELAYS—Continued Group No. of airplanes, as identified in Boeing Service Bulletin 777–28A0038, Revision 1, dated September 20, 2010 Panel No. Group 1 ............................... P210 Group 1 ............................... P320 Group 2 ............................... P110 Group 2 ............................... P210 Group 2 ............................... P320 Group 3 ............................... P110 Group 3 ............................... P210 Group 3 ............................... P320 Group 4 ............................... P110 Group 4 ............................... P210 Group 4 ............................... P320 Service bulletin Smiths Service 6000ELM–28–444. Smiths Service 4000ELM–28–445. GE Aviation Service 5000ELM–28–446. Smiths Service 6000ELM–28–447. GE Aviation Service 4000ELM–28–448. GE Aviation Service 5000ELM–28–449. Smiths Service 6000ELM–28–450. GE Aviation Service 4000ELM–28–451. Smiths Service 5000ELM–28–463. Smiths Service 6000ELM–28–464. Smiths Service 4000ELM–28–465. Revision level Bulletin Original .............................. August 8, 2007. Bulletin Original .............................. August 8, 2007. Bulletin 1 ........................................ January 7, 2010. Bulletin Original .............................. August 8, 2007. Bulletin 1 ........................................ January 7, 2010. Bulletin 1 ........................................ January 7, 2010. Bulletin Original .............................. August 8, 2007. Bulletin 1 ........................................ January 7, 2010. Bulletin Original .............................. August 8, 2007. Bulletin Original .............................. August 8, 2007. Bulletin Original .............................. August 8, 2007. emcdonald on DSK2BSOYB1PROD with PROPOSALS Paperwork Reduction Act Burden Statement (j) A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a current valid OMB Control Number. The OMB Control Number for this information collection is 2120–0056. Public reporting for this collection of information is estimated to be approximately 5 minutes per response, including the time for reviewing instructions, completing and reviewing the collection of information. All responses to this collection of information are mandatory. Comments concerning the accuracy of this burden and suggestions for reducing the burden should be directed to the FAA at: 800 Independence Ave., SW., Washington, DC 20591, Attn: Information Collection Clearance Officer, AES–200. (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. Issued in Renton, Washington, on December 17, 2010. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. Alternative Methods of Compliance (AMOCs) (k)(1) The Manager, Seattle Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to Attn: Georgios Roussos, Aerospace Engineer, Systems and Equipment Branch, ANM–130S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98057–3356; telephone (425) 917–6482; fax (425) 917–6590. Information may be e-mailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector RIN 2120–AA64 VerDate Mar<15>2010 17:55 Dec 27, 2010 Jkt 223001 [FR Doc. 2010–32657 Filed 12–27–10; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2010–1204; Directorate Identifier 2010–NM–147–AD] Airworthiness Directives; Various Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) Units Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for various aircraft equipped with certain ACSS TCAS units. This proposed AD would require upgrading software. This proposed AD results from reports of SUMMARY: PO 00000 Frm 00005 Date Fmt 4702 Sfmt 4702 anomalies with TCAS units during a flight test over a high density airport. The TCAS units dropped several reduced surveillance aircraft tracks because of interference limiting. We are proposing this AD to prevent TCAS units from dropping tracks, which could compromise separation of air traffic and lead to subsequent mid-air collisions. DATES: We must receive comments on this proposed AD by February 11, 2011. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service information identified in this proposed AD, contact Aviation Communication & Surveillance Systems, LLC, 19810 North 7th Avenue, Phoenix, Arizona 85027–4741; telephone (623) 445–7040; fax (623) 445–7004; e-mail acss.orderadmin@L3com.com; Internet http:// www.acss.com. You may review copies of the referenced service information at E:\FR\FM\28DEP1.SGM 28DEP1 Federal Register / Vol. 75, No. 248 / Tuesday, December 28, 2010 / Proposed Rules the FAA, Transport Airplane Directorate, 1601 Lind, Avenue, SW., Renton, Washington. For information on the availability of this material at the FAA, call 425–227–1221. Examining the AD Docket You may examine the AD docket on the Internet at http:// www.regulations.gov; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (telephone 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Abby Malmir, Aerospace Engineer, Systems and Equipment Branch, ANM– 130L, FAA, Los Angeles Aircraft Certification Office (ACO), 3960 Paramount Boulevard, Lakewood, California 90712–4137; telephone (562) 627–5351; fax (562) 627–5210. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2010–1204; Directorate Identifier 2010–NM–147–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because of those comments. We will post all comments we receive, without change, to http:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. Discussion We have received reports of anomalies with the Aviation 81513 Communication & Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) units during a flight test over a high density airport. The TCAS units dropped several reduced surveillance aircraft tracks because of interference limiting. When the TCAS unit interrogated aircraft in a high density airport area, some of the targets disappeared from the cockpit display or were not recognized. One occurrence of dropped tracks occurred for 30 to 40 seconds of a 90-minute flight segment. This condition, if not corrected, could lead to possible loss of separation of air traffic and possible mid-air collision. Relevant Service Information We have reviewed the ACSS service information specified in the following table. The service information describes procedures for upgrading software for the ACSS TCAS to improve tracking of nearby Mode-S intruders in high density environments. RELEVANT SERVICE INFORMATION ACSS Publication No. ATA Service Bulletin No. 4066010–34–6036 7517900–34–6040 7517900–34–6041 7517900–34–6042 9000000–34–6016 9000000–34–6017 9000000–34–6018 9003000–34–6006 9003500–34–6014 9003500–34–6015 9003500–34–6016 ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ emcdonald on DSK2BSOYB1PROD with PROPOSALS FAA’s Determination and Requirements of This Proposed AD We are proposing this AD because we evaluated all relevant information and determined the unsafe condition described previously is likely to exist or develop in other products of these same type designs. This proposed AD would require accomplishing the actions specified in the service information described previously. Costs of Compliance We estimate that this proposed AD would affect 9,000 airplanes of U.S. registry. We also estimate that it would take about 2 work-hours per product to comply with this proposed AD. The average labor rate is $85 per work-hour. Required parts would cost up to $2,870 per product. Based on these figures, we estimate the cost of this proposed AD to VerDate Mar<15>2010 17:55 Dec 27, 2010 Jkt 223001 8008230–001 8008229–001 8008231–001 8008236–001 8008233–001 8008234–001 8008238–001 8008235–001 8008221–001 8008222–001 8008223–001 the U.S. operators to be up to $27,360,000, or up to $3,040 per product. 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 PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 Date May 25, 2010. May 12, 2010. May 24, 2010. May 27, 2010. June 4, 2010. June 4, 2010. June 4, 2010. June 4, 2010. May 27, 2010. May 27, 2010. May 27, 2010. safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this proposed regulation: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866, E:\FR\FM\28DEP1.SGM 28DEP1 81514 Federal Register / Vol. 75, No. 248 / Tuesday, December 28, 2010 / Proposed Rules 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. You can find our regulatory evaluation and the estimated costs of compliance in the AD Docket. List of Subjects in 14 CFR Part 39 § 39.13 1204; Directorate Identifier 2010–NM– 147–AD. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Comments Due Date (a) We must receive comments by February 11, 2011. PART 39—AIRWORTHINESS DIRECTIVES Affected ADs 1. The authority citation for part 39 continues to read as follows: Applicability (c) This AD applies to Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) units with the part numbers (P/Ns) specified in the ACSS service bulletins identified in Table 1 of this AD, as installed on, but not limited to, various transport and small airplanes, certificated in any category. (b) None. Authority: 49 U.S.C. 106(g), 40113, 44701. [Amended] 2. The FAA amends § 39.13 by adding the following new AD: Aviation Communication & Surveillance Systems, LLC: Docket No. FAA–2010– TABLE 1—APPLICABLE SERVICE BULLETINS ACSS Publication No. ATA Service Bulletin No. 4066010–34–6036 7517900–34–6040 7517900–34–6041 7517900–34–6042 9000000–34–6016 9000000–34–6017 9000000–34–6018 9003000–34–6006 9003500–34–6014 9003500–34–6015 9003500–34–6016 ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ ........................................................................................ Subject Unsafe Condition (e) This AD results from reports of anomalies with TCAS units during a flight test over a high density airport. The TCAS units dropped several reduced surveillance aircraft tracks because of interference limiting. The Federal Aviation Administration is issuing this AD to prevent TCAS units from dropping tracks, which could compromise separation of air traffic and lead to subsequent mid-air collisions. Compliance (f) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. emcdonald on DSK2BSOYB1PROD with PROPOSALS Upgrade Software (g) Within 48 months after the effective date of this AD, upgrade software for the ACSS TCAS, in accordance with the Accomplishment Instructions of the applicable ACSS service bulletin identified in Table 1 of this AD. Note 1: ACSS Publication Number 8008233–001, dated June 4, 2010, ATA Service Bulletin 9000000–34–6016, contains three part numbers (P/Ns 9000000–10007, –20007, and –55007) which were never produced. 17:55 Dec 27, 2010 Jkt 223001 May 25, 2010. May 12, 2010. May 24, 2010. May 27, 2010. June 4, 2010. June 4, 2010. June 4, 2010. June 4, 2010. May 27, 2010. May 27, 2010. May 27, 2010. Alternative Methods of Compliance (AMOCs) (d) Air Transport Association (ATA) of America Code 34: Navigation. VerDate Mar<15>2010 8008230–001 8008229–001 8008231–001 8008236–001 8008233–001 8008234–001 8008238–001 8008235–001 8008221–001 8008222–001 8008223–001 Date DEPARTMENT OF TRANSPORTATION (h)(1) The Manager, Los Angeles Aircraft Certification Office (ACO), FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information to Attn: Abby Malmir, Aerospace Engineer, Systems and Equipment Branch, ANM–130L, FAA, Los Angeles ACO, 3960 Paramount Boulevard, Lakewood, California 90712–4137; telephone (562) 627–5351; fax (562) 627–5210. (2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your principal maintenance inspector (PMI) or principal avionics inspector (PAI), as appropriate, or lacking a principal inspector, your local Flight Standards District Office. The AMOC approval letter must specifically reference this AD. Federal Aviation Administration Issued in Renton, Washington, on December 13, 2010. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2010–32658 Filed 12–27–10; 8:45 am] BILLING CODE 4910–13–P PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 14 CFR Part 71 [Docket No. FAA–2010–1172; Airspace Docket No. 10–ACE–14] Proposed Amendment of Class E Airspace; Point Lookout, MO Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: This action proposes to amend Class E airspace at Point Lookout, MO. Additional controlled airspace is necessary to accommodate new Standard Instrument Approach Procedures (SIAP) at M. Graham ClarkTaney Field Airport. The FAA is taking this action to enhance the safety and management of Instrument Flight Rules (IFR) operations at the airport. This action also changes the airport name. DATES: 0901 UTC. Comments must be received on or before February 11, 2011. ADDRESSES: Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, 1200 New Jersey Avenue, SE., West Building SUMMARY: E:\FR\FM\28DEP1.SGM 28DEP1

Agencies

[Federal Register Volume 75, Number 248 (Tuesday, December 28, 2010)]
[Proposed Rules]
[Pages 81512-81514]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2010-32658]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-1204; Directorate Identifier 2010-NM-147-AD]
RIN 2120-AA64


Airworthiness Directives; Various Aviation Communication & 
Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance 
System (TCAS) Units

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
various aircraft equipped with certain ACSS TCAS units. This proposed 
AD would require upgrading software. This proposed AD results from 
reports of anomalies with TCAS units during a flight test over a high 
density airport. The TCAS units dropped several reduced surveillance 
aircraft tracks because of interference limiting. We are proposing this 
AD to prevent TCAS units from dropping tracks, which could compromise 
separation of air traffic and lead to subsequent mid-air collisions.

DATES: We must receive comments on this proposed AD by February 11, 
2011.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays.
    For service information identified in this proposed AD, contact 
Aviation Communication & Surveillance Systems, LLC, 19810 North 7th 
Avenue, Phoenix, Arizona 85027-4741; telephone (623) 445-7040; fax 
(623) 445-7004; e-mail 3com.com">acss.orderadmin@L-3com.com; Internet http://www.acss.com. You may review copies of the referenced service 
information at

[[Page 81513]]

the FAA, Transport Airplane Directorate, 1601 Lind, Avenue, SW., 
Renton, Washington. For information on the availability of this 
material at the FAA, call 425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility 
between 9 a.m. and 5 p.m., Monday through Friday, except Federal 
holidays. The AD docket contains this proposed AD, the regulatory 
evaluation, any comments received, and other information. The street 
address for the Docket Office (telephone 800-647-5527) is in the 
ADDRESSES section. Comments will be available in the AD docket shortly 
after receipt.

FOR FURTHER INFORMATION CONTACT: Abby Malmir, Aerospace Engineer, 
Systems and Equipment Branch, ANM-130L, FAA, Los Angeles Aircraft 
Certification Office (ACO), 3960 Paramount Boulevard, Lakewood, 
California 90712-4137; telephone (562) 627-5351; fax (562) 627-5210.

SUPPLEMENTARY INFORMATION:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2010-1204; 
Directorate Identifier 2010-NM-147-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD because of those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    We have received reports of anomalies with the Aviation 
Communication & Surveillance Systems (ACSS) Traffic Alert and Collision 
Avoidance System (TCAS) units during a flight test over a high density 
airport. The TCAS units dropped several reduced surveillance aircraft 
tracks because of interference limiting. When the TCAS unit 
interrogated aircraft in a high density airport area, some of the 
targets disappeared from the cockpit display or were not recognized. 
One occurrence of dropped tracks occurred for 30 to 40 seconds of a 90-
minute flight segment. This condition, if not corrected, could lead to 
possible loss of separation of air traffic and possible mid-air 
collision.

Relevant Service Information

    We have reviewed the ACSS service information specified in the 
following table. The service information describes procedures for 
upgrading software for the ACSS TCAS to improve tracking of nearby 
Mode-S intruders in high density environments.

                      Relevant Service Information
------------------------------------------------------------------------
                                   ACSS Publication
     ATA Service Bulletin No.             No.                Date
------------------------------------------------------------------------
4066010-34-6036..................       8008230-001  May 25, 2010.
7517900-34-6040..................       8008229-001  May 12, 2010.
7517900-34-6041..................       8008231-001  May 24, 2010.
7517900-34-6042..................       8008236-001  May 27, 2010.
9000000-34-6016..................       8008233-001  June 4, 2010.
9000000-34-6017..................       8008234-001  June 4, 2010.
9000000-34-6018..................       8008238-001  June 4, 2010.
9003000-34-6006..................       8008235-001  June 4, 2010.
9003500-34-6014..................       8008221-001  May 27, 2010.
9003500-34-6015..................       8008222-001  May 27, 2010.
9003500-34-6016..................       8008223-001  May 27, 2010.
------------------------------------------------------------------------

FAA's Determination and Requirements of This Proposed AD

    We are proposing this AD because we evaluated all relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of these same type 
designs. This proposed AD would require accomplishing the actions 
specified in the service information described previously.

Costs of Compliance

    We estimate that this proposed AD would affect 9,000 airplanes of 
U.S. registry. We also estimate that it would take about 2 work-hours 
per product to comply with this proposed AD. The average labor rate is 
$85 per work-hour. Required parts would cost up to $2,870 per product. 
Based on these figures, we estimate the cost of this proposed AD to the 
U.S. operators to be up to $27,360,000, or up to $3,040 per product.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866,

[[Page 81514]]

    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.
    You can find our regulatory evaluation and the estimated costs of 
compliance in the AD Docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

    1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

    2. The FAA amends Sec.  39.13 by adding the following new AD:

Aviation Communication & Surveillance Systems, LLC: Docket No. FAA-
2010-1204; Directorate Identifier 2010-NM-147-AD.

Comments Due Date

    (a) We must receive comments by February 11, 2011.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Aviation Communication & Surveillance 
Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) 
units with the part numbers (P/Ns) specified in the ACSS service 
bulletins identified in Table 1 of this AD, as installed on, but not 
limited to, various transport and small airplanes, certificated in 
any category.

                  Table 1--Applicable Service Bulletins
------------------------------------------------------------------------
                                         ACSS
     ATA Service Bulletin No.       Publication No.          Date
------------------------------------------------------------------------
4066010-34-6036..................       8008230-001  May 25, 2010.
7517900-34-6040..................       8008229-001  May 12, 2010.
7517900-34-6041..................       8008231-001  May 24, 2010.
7517900-34-6042..................       8008236-001  May 27, 2010.
9000000-34-6016..................       8008233-001  June 4, 2010.
9000000-34-6017..................       8008234-001  June 4, 2010.
9000000-34-6018..................       8008238-001  June 4, 2010.
9003000-34-6006..................       8008235-001  June 4, 2010.
9003500-34-6014..................       8008221-001  May 27, 2010.
9003500-34-6015..................       8008222-001  May 27, 2010.
9003500-34-6016..................       8008223-001  May 27, 2010.
------------------------------------------------------------------------

Subject

    (d) Air Transport Association (ATA) of America Code 34: 
Navigation.

Unsafe Condition

    (e) This AD results from reports of anomalies with TCAS units 
during a flight test over a high density airport. The TCAS units 
dropped several reduced surveillance aircraft tracks because of 
interference limiting. The Federal Aviation Administration is 
issuing this AD to prevent TCAS units from dropping tracks, which 
could compromise separation of air traffic and lead to subsequent 
mid-air collisions.

Compliance

    (f) You are responsible for having the actions required by this 
AD performed within the compliance times specified, unless the 
actions have already been done.

Upgrade Software

    (g) Within 48 months after the effective date of this AD, 
upgrade software for the ACSS TCAS, in accordance with the 
Accomplishment Instructions of the applicable ACSS service bulletin 
identified in Table 1 of this AD.

    Note 1: ACSS Publication Number 8008233-001, dated June 4, 2010, 
ATA Service Bulletin 9000000-34-6016, contains three part numbers 
(P/Ns 9000000-10007, -20007, and -55007) which were never produced.

Alternative Methods of Compliance (AMOCs)

    (h)(1) The Manager, Los Angeles Aircraft Certification Office 
(ACO), FAA, has the authority to approve AMOCs for this AD, if 
requested using the procedures found in 14 CFR 39.19. Send 
information to Attn: Abby Malmir, Aerospace Engineer, Systems and 
Equipment Branch, ANM-130L, FAA, Los Angeles ACO, 3960 Paramount 
Boulevard, Lakewood, California 90712-4137; telephone (562) 627-
5351; fax (562) 627-5210.
    (2) To request a different method of compliance or a different 
compliance time for this AD, follow the procedures in 14 CFR 39.19. 
Before using any approved AMOC on any airplane to which the AMOC 
applies, notify your principal maintenance inspector (PMI) or 
principal avionics inspector (PAI), as appropriate, or lacking a 
principal inspector, your local Flight Standards District Office. 
The AMOC approval letter must specifically reference this AD.

    Issued in Renton, Washington, on December 13, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2010-32658 Filed 12-27-10; 8:45 am]
BILLING CODE 4910-13-P