Airworthiness Directives; Boeing Model 777 Series Airplanes Equipped With Pratt & Whitney Engines and Used in Extended Range Twin-Engine Operations (ETOPS), 58357-58358 [05-20076]

Download as PDF Federal Register / Vol. 70, No. 193 / Thursday, October 6, 2005 / Proposed Rules Instructions of the service bulletins identified in paragraphs (f)(1) and (f)(2) of this AD, as applicable. (1) For Model CL–600–1A11 (CL–600) airplanes: Bombardier Service Bulletin 600– 0720, dated January 31, 2005. (2) For Bombardier Model CL–600–2A12 (CL–601), and CL–600–2B16 (CL–601–3A and CL–601–3R) airplanes: Bombardier Service Bulletin 601–0555, dated January 31, 2005. Note 1: The Bombardier service bulletins identified in paragraphs (f)(1) and (f)(2) of this AD refer to Goodrich Service Bulletin 21207–00X–27–05, dated January 31, 2005, as an additional source of service information for doing the modification of the HSTA. Measurement and Modification or Replacement (g) Within 600 flight hours or 16 months after the effective date of this AD, whichever is first: Measure the clearance between the yoke and the lower side of the gimbal pin head on the HSTA to detect migration of the lower gimbal pin of the HSTA, and do a detailed inspection to detect discrepancies of the HSTA, in accordance with the service bulletin. (1) If the lower gimbal pin has not migrated and no discrepancy is found: Modify the HSTA by installing the gimbal pin kit, or replace the existing HSTA with a new or serviceable, modified HSTA, in accordance with the service bulletin. (2) If the lower gimbal pin has migrated or any discrepancy is found: Before further flight, replace the HSTA with a new or serviceable, modified HSTA, in accordance with the service bulletin. Note 2: For the purposes of this AD, a detailed inspection is: ‘‘An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.’’ Reporting (h) If any gimbal pin is found migrated: Submit a report of the findings (migrated pins only) of the measurement and inspections required by paragraph (g) of this AD to Bombardier, Attention Dept. Customer Support Program Office (CSPO), fax (514) 855’8798. Submit the report at the applicable time specified in paragraph (h)(1) or (h)(2) of this AD. The report must include the airplane serial number, the HSTA part number and serial number, the results of the inspection, and the action taken. Submitting the Service Bulletin Feedback Form of the applicable service bulletin is an acceptable means of complying with this requirement. Under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has approved the information collection requirements contained in this AD and has assigned OMB Control Number 2120–0056. VerDate Aug<31>2005 15:32 Oct 05, 2005 Jkt 208001 (1) If the measurement was done after the effective date of this AD: Submit the report within 30 days after the inspection. (2) If the measurement was done prior to the effective date of this AD: Submit the report within 30 days after the effective date of this AD. Parts Installation (i) As of the effective date of this AD, no person may install an HSTA on any airplane unless the actions required by paragraph (g) of this AD are accomplished on it. Alternative Methods of Compliance (AMOCs) (j)(1) The Manager, New York Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (2) 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. Related Information (k) Canadian airworthiness directive CF– 2005–20, dated June 23, 2005, also addresses the subject of this AD. Issued in Renton, Washington, on September 28, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–20065 Filed 10–5–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. 97–NM–78–AD] RIN 2120–AA64 Airworthiness Directives; Boeing Model 777 Series Airplanes Equipped With Pratt & Whitney Engines and Used in Extended Range Twin-Engine Operations (ETOPS) Federal Aviation Administration, DOT. ACTION: Proposed rule; withdrawal. AGENCY: SUMMARY: This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to certain Boeing Model 777 series airplanes equipped with Pratt & Whitney engines. That action would have required replacement of the integrated drive generator (IDG) and the backup generator with a new IDG and a new backup generator. Since the issuance of the NPRM, the Federal Aviation Administration (FAA) has received new PO 00000 Frm 00006 Fmt 4702 Sfmt 4702 58357 data that indicate that all affected airplanes worldwide have the proper parts installed and all spares are accounted for, and that the identified unsafe condition (loss of electrical power) cannot occur for the reasons specified by the NPRM. Accordingly, the proposed rule is withdrawn. FOR FURTHER INFORMATION CONTACT: Tony Castillos, Aerospace Engineer, Systems and Equipment Branch, ANM– 130S, FAA, Seattle Aircraft Certification Office; 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 227–2864; fax (425) 227–1181. SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal Aviation Regulations (14 CFR part 39) to add a new airworthiness directive (AD), applicable to certain Boeing Model 777 series airplanes equipped with Pratt & Whitney engines, was published in the Federal Register as a Notice of Proposed Rulemaking (NPRM) on January 5, 1998 (63 FR 169). The proposed rule would have required replacement of the integrated drive generator (IDG) and the backup generator with a new IDG and a new backup generator. That action was prompted by reports of IDG shaft failure resulting from design problems in the hydraulic and mechanical systems of the generator, and by reports of backup generator failure resulting from the failure of the oil pressure switch. The proposed actions were intended to prevent continued degradation of the power system, and consequent loss of electrical power. Actions That Occurred Since the NPRM Was Issued Since the issuance of that NPRM, the FAA has received and confirmed reports indicating that all affected airplanes worldwide have the proper parts installed and that all spares are accounted for. FAA’s Conclusions Upon further consideration, the FAA has determined that the unsafe condition identified in the NPRM (loss of electrical power) can no longer occur because of the reasons given in the NPRM. Accordingly, the proposed rule is hereby withdrawn. Withdrawal of this NPRM constitutes only such action, and does not preclude the agency from issuing another action in the future, nor does it commit the agency to any course of action in the future. Regulatory Impact Since this action only withdraws a notice of proposed rulemaking, it is neither a proposed nor a final rule and therefore is not covered under Executive E:\FR\FM\06OCP1.SGM 06OCP1 58358 Federal Register / Vol. 70, No. 193 / Thursday, October 6, 2005 / Proposed Rules Order 12866, the Regulatory Flexibility Act, or DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979). List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. The Withdrawal Accordingly, the notice of proposed rulemaking, Docket 97–NM–78–AD, published in the Federal Register on January 5, 1998 (63 FR 169), is withdrawn. Issued in Renton, Washington, on September 29, 2005. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–20076 Filed 10–5–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2005–22629; Directorate Identifier 2005–NM–089–AD] RIN 2120–AA64 Airworthiness Directives; Boeing Model 737–200, –300, –400, and –500 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 737–200, –300, –400, and –500 series airplanes. This proposed AD would require a one-time inspection of frames between station 360 and station 907 to determine if a subject support bracket for the air conditioning outlet extrusion is installed, and related repetitive investigative actions and repair if necessary. This proposed AD also provides an optional preventive modification that would end the repetitive investigative actions. This proposed AD would also require a onetime post-modification/repair inspection for cracking of each repaired/ modified frame. This proposed AD results from numerous reports indicating that frame cracks have been found at the attachment holes for support brackets for the air conditioning outlet extrusion. We are proposing this AD to detect and correct such cracking, VerDate Aug<31>2005 15:32 Oct 05, 2005 Jkt 208001 which, if the cracking were to continue to grow, could result in a severed frame. A severed frame, combined with existing multi-site damage at the stringer 10 lap splice, could result in rapid decompression of the airplane. DATES: We must receive comments on this proposed AD by November 21, 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. • 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. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for the service information identified in this proposed AD. FOR FURTHER INFORMATION CONTACT: Sue Lucier, Aerospace Engineer, Airframe Branch, ANM–120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 917–6438; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to submit any relevant written data, views, or arguments regarding this proposed AD. Include the docket number ‘‘FAA–2005–22629; Directorate Identifier 2005–NM–089– 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 consider all comments received by the closing date and may amend the proposed AD in light of those comments. We will post all comments we receive, without change, to https:// dms.dot.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this proposed AD. Using the search function of that Web site, anyone can find and read the comments in any of our dockets, PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 including the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You may review DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78), or you may visit https:// dms.dot.gov. Examining the Docket You may 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 Docket Management System receives them. Discussion We have received numerous reports indicating that frame cracks have been found at the attachment holes for support brackets for the air conditioning outlet extrusion on Boeing Model 737– 200, –300, –400, and –500 series airplanes. The subject support brackets have a certain part number and are attached to the frame with two rivets. Subject support brackets may be installed on frames between station 360 and station 907. Investigation has revealed that the frame cracks occur due to fatigue and grow in a circumferential direction. The circumferential growth of the cracks is not likely to lead to a severed frame; however, with continued fatigue cycling, a crack could potentially turn in a direction that would lead to a severed frame. Also, frame cracks have been found on multiple adjacent frames, and at the lower row of fasteners of the stringer 10 lap joint, which is susceptible to multi-site damage. Therefore, frame cracks at the attachment holes for the support bracket of the air conditioning outlet extrusion, if not corrected, could eventually lead to a severed frame, which, combined with existing multi-site damage at the stringer 10 lap splice, could result in rapid decompression of the airplane. Relevant Service Information We have reviewed Boeing Special Attention Service Bulletin 737–53– 1216, dated January 27, 2005. Part I of the service bulletin describes procedures for a general visual inspection to identify where subject support brackets (defined previously) may be installed on frames between station 360 and station 907. Part I of the E:\FR\FM\06OCP1.SGM 06OCP1

Agencies

[Federal Register Volume 70, Number 193 (Thursday, October 6, 2005)]
[Proposed Rules]
[Pages 58357-58358]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-20076]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-NM-78-AD]
RIN 2120-AA64


Airworthiness Directives; Boeing Model 777 Series Airplanes 
Equipped With Pratt & Whitney Engines and Used in Extended Range Twin-
Engine Operations (ETOPS)

AGENCY: Federal Aviation Administration, DOT.

ACTION: Proposed rule; withdrawal.

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

SUMMARY: This action withdraws a notice of proposed rulemaking (NPRM) 
that proposed a new airworthiness directive (AD), applicable to certain 
Boeing Model 777 series airplanes equipped with Pratt & Whitney 
engines. That action would have required replacement of the integrated 
drive generator (IDG) and the backup generator with a new IDG and a new 
backup generator. Since the issuance of the NPRM, the Federal Aviation 
Administration (FAA) has received new data that indicate that all 
affected airplanes worldwide have the proper parts installed and all 
spares are accounted for, and that the identified unsafe condition 
(loss of electrical power) cannot occur for the reasons specified by 
the NPRM. Accordingly, the proposed rule is withdrawn.

FOR FURTHER INFORMATION CONTACT: Tony Castillos, Aerospace Engineer, 
Systems and Equipment Branch, ANM-130S, FAA, Seattle Aircraft 
Certification Office; 1601 Lind Avenue, SW., Renton, Washington 98055-
4056; telephone (425) 227-2864; fax (425) 227-1181.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) to add a new airworthiness 
directive (AD), applicable to certain Boeing Model 777 series airplanes 
equipped with Pratt & Whitney engines, was published in the Federal 
Register as a Notice of Proposed Rulemaking (NPRM) on January 5, 1998 
(63 FR 169). The proposed rule would have required replacement of the 
integrated drive generator (IDG) and the backup generator with a new 
IDG and a new backup generator. That action was prompted by reports of 
IDG shaft failure resulting from design problems in the hydraulic and 
mechanical systems of the generator, and by reports of backup generator 
failure resulting from the failure of the oil pressure switch. The 
proposed actions were intended to prevent continued degradation of the 
power system, and consequent loss of electrical power.

Actions That Occurred Since the NPRM Was Issued

    Since the issuance of that NPRM, the FAA has received and confirmed 
reports indicating that all affected airplanes worldwide have the 
proper parts installed and that all spares are accounted for.

FAA's Conclusions

    Upon further consideration, the FAA has determined that the unsafe 
condition identified in the NPRM (loss of electrical power) can no 
longer occur because of the reasons given in the NPRM. Accordingly, the 
proposed rule is hereby withdrawn.
    Withdrawal of this NPRM constitutes only such action, and does not 
preclude the agency from issuing another action in the future, nor does 
it commit the agency to any course of action in the future.

Regulatory Impact

    Since this action only withdraws a notice of proposed rulemaking, 
it is neither a proposed nor a final rule and therefore is not covered 
under Executive

[[Page 58358]]

Order 12866, the Regulatory Flexibility Act, or DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979).

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Withdrawal

    Accordingly, the notice of proposed rulemaking, Docket 97-NM-78-AD, 
published in the Federal Register on January 5, 1998 (63 FR 169), is 
withdrawn.

    Issued in Renton, Washington, on September 29, 2005.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 05-20076 Filed 10-5-05; 8:45 am]
BILLING CODE 4910-13-P
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