Airworthiness Directives; Boeing Model 777-200 and -300 Series Airplanes, 74641-74645 [05-24050]

Download as PDF Federal Register / Vol. 70, No. 241 / Friday, December 16, 2005 / Rules and Regulations 74641 FOR FURTHER INFORMATION CONTACT: [Docket No. FAA–2005–21356; Directorate Identifier 2004–NM–223–AD; Amendment 39–14417; AD 2005–25–24] Gary Oltman, Aerospace Engineer, Airframe Branch, ANM–120S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055–4056; telephone (425) 917–6443; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: We agree. We did not intend to differ from the compliance time recommended in the service bulletin. Therefore, we have revised the compliance times of the initial inspection in the third row of Table 1 of this AD and the repetitive inspection interval in the second and third rows of Table 1 of this AD. RIN 2120–AA64 Examining the Docket Airworthiness Directives; Boeing Model 777–200 and –300 Series Airplanes You may examine the airworthiness directive (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 street address stated in the ADDRESSES section. Request To Clarify Certain Compliance Times One commenter requests that we clarify when the compliance time clock starts for the initial inspections of the Model 777–200 and –300 series airplanes powered by Rolls-Royce engines. These compliance times are listed in rows 2 and 3, of the second column of Table 1 of the NPRM. The commenter states that, according to Boeing Service Bulletin 777–27A0056, Revision 1, the clock for measuring flight cycles and flight hours should start from the date of airplane delivery. The commenter asserts that compliance times as written in the NPRM do not clearly state that. We agree. We have revised the compliance times in rows 1, 2, and 3, of the second column of Table 1 of this AD to specify that the threshold of the initial inspection should be measured from ‘‘* * * the date of issuance of the original standard airworthiness certificate or the date of issuance of the original export certificate of airworthiness.’’ DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777–200 and –300 series airplanes. This AD requires repetitive detailed inspections of the forward lugs of the power control unit (PCU), yoke assembly, and forward attachment hardware of the left inboard, left outboard, right inboard, and right outboard flaperon PCUs; and other specified/corrective actions if necessary. For certain airplanes, this AD also requires other related concurrent actions. This AD results from reports indicating that operators have found worn, fretted, and fractured bolts that attach the yoke assembly to the flaperon PCU. We are issuing this AD to prevent damage and eventual fracture of the yoke assembly, pin assembly, and attachment bolts that connect the inboard and outboard PCUs to a flaperon, which could lead to the flaperon becoming unrestrained and consequently departing from the airplane. Loss of a flaperon could result in asymmetric lift and reduced roll control of an airplane. A departing flaperon could also cause damage to the horizontal and vertical stabilizers, which could result in loss of control of the airplane if damage is significant. DATES: This AD becomes effective January 20, 2006. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of January 20, 2006. ADDRESSES: You may examine the 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., Nassif Building, room PL–401, Washington, DC. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for service information identified in this AD. VerDate Aug<31>2005 17:25 Dec 15, 2005 Jkt 208001 Discussion The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to certain Boeing Model 777–200 and –300 series airplanes. That NPRM was published in the Federal Register on June 3, 2005 (70 FR 32524). That NPRM proposed to require repetitive detailed inspections of the forward lugs of the power control unit (PCU), yoke assembly, and forward attachment hardware of the left inboard, left outboard, right inboard, and right outboard flaperon PCUs; and other specified/corrective actions if necessary. For certain airplanes, the NPRM also proposed to require other related concurrent actions. Comments We provided the public the opportunity to participate in the development of this AD. We have considered the comments received. Request To Revise Compliance Time for Certain Airplanes Two commenters request that we revise the compliance times of the initial and repetitive inspections for Model 777–200 and –300 series airplanes powered by Rolls-Royce engines. Both commenters state that the initial inspection in the third row of Table 1 of the NPRM should be specified in flight hours. One commenter, the airplane manufacturer, states that the repetitive inspections in the second and third rows of Table 1 of the NPRM should also be specified in flight hours. The commenters point out that these revisions are consistent with what is recommended in Boeing Service Bulletin 777–27A0056, Revision 1, dated July 8, 2004. PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 Request To Add Line Numbers (L/Ns) to Table 1 One commenter, the manufacturer, requests that we make the following changes to Table 1 of the NPRM: • In row 1 of the first column, add L/ Ns 1 through 297 inclusive for Model 777–200 and –300 airplanes powered by General Electric or Pratt & Whitney engines. • In row 2 of the first column, add L/ Ns 1 through 297 inclusive for Model 777–200 and –300 airplanes powered by Rolls-Royce engines. • In row 3 of the first column, add L/ Ns 298 and subsequent for Model 777– 200 and –300 airplanes powered by Rolls-Royce engines. • In row 2 of the second column, add the phrase ‘‘* * * date of this AD, whichever is later.’’ For clarification we agree to add ‘‘L/ Ns 1 through 297 inclusive’’ to row 1 of the first column of Table 1 of this AD. We have verified that the commenter’s other proposed changes were included in the NPRM, as published in the Federal Register on June 3, 2005. That information is retained in this AD, so no additional change to this AD is necessary in this regard. E:\FR\FM\16DER1.SGM 16DER1 74642 Federal Register / Vol. 70, No. 241 / Friday, December 16, 2005 / Rules and Regulations Request To Identify Engine Type One commenter requests that, for the proposed initial and repetitive inspections, we clarify whether the applicable airplanes are powered by General Electric, Pratt & Whitney, or Rolls-Royce engines. The commenter states that Boeing Service Bulletin 777– 27A0056, Revision 1, identifies the applicable airplanes as Group 1, 2, or 3 airplanes with the inspection details. We agree. We have revised Table 1 of this AD to identify the affected airplanes as Group 1, 2, or 3 airplanes, in addition to including the line numbers and engine types. With the changes discussed previously, this information is consistent with what is specified in the effectivity of Boeing Service Bulletin 777–27A0056, Revision 1. Request To Delete Compliance Time for Corrective Actions One commenter requests that we delete the last sentence of paragraph (f) of the NPRM: ‘‘Do the applicable corrective actions before further flight.’’ The commenter states that this sentence conflicts with the compliance times in Table 1 of the NPRM. We do not agree to delete the sentence. Table 1 of this AD specifies compliance times for doing the initial and repetitive inspections. The last sentence of paragraph (f) of this AD specifies the compliance time for doing the corrective actions if, during any inspection, any damage to the attachment hardware, PCU lug, or yoke assembly is found, or a migrated or rotated bearing is found. We defined these corrective actions in the ‘‘Relevant Service Information’’ paragraph of the NPRM. These corrective actions must be done before further flight after finding damage. We inadvertently omitted the compliance time for the other specified action, which is tightening the attachment bolts to a higher torque value. The other specified action must also be done before further flight after accomplishing the inspections specified in paragraphs (f)(1) through (f)(5) of this AD. Therefore, we have added that action to the last sentence of paragraph (f) of this AD. Request To Add Concurrent Requirement One commenter requests that we delete reference to Boeing Service Bulletin 777–27–0049, dated August 30, 2001, from paragraph (h) of the NPRM, and add it to paragraph (g) of the NPRM. As justification, the commenter states that Boeing Service Bulletin 777– 27A0056, Revision 1, recommends VerDate Aug<31>2005 16:21 Dec 15, 2005 Jkt 208001 accomplishing both Boeing Service Bulletin 777–27–0009, Revision 1, dated May 8, 2003, and Boeing Service Bulletin 777–27–0049 concurrently with Boeing Service Bulletin 777–27A0056, Revision 1. We disagree. As we stated in the difference paragraph of the NPRM, this AD does not require concurrent accomplishment of Boeing Service Bulletin 777–27–0049. Instead, paragraph (g) of this AD requires concurrent accomplishment of Boeing Service Bulletin 777–27–0009, Revision 1, with the exception to install new, improved steel yoke assemblies having improved bearing retention, part number (P/N) 251W1130–3. We have determined that installing P/N 251W1130–3 concurrently with doing the detailed inspections of the forward lugs of the PCU and of the attachment hardware for damage (required by paragraphs (f)(1) and (f)(5) of this AD), in accordance with Boeing Service Bulletin 777–27A0056, Revision 1, adequately addresses the concurrent requirements identified in Boeing Service Bulletin 777–27–0049. Therefore, no change to this AD is necessary in this regard. Request for Credit for Group 1 Airplanes One commenter requests that we revise paragraph (h) of the NPRM to give credit to Group 1 airplanes for the inspections specified in paragraphs (f)(1) through (f)(5) of the NPRM. The commenter points out that Note 3 in the Accomplishment Instructions of Boeing Service Bulletin 777–27A0056, Revision 1, states that Group 1 airplanes have accomplished the intent of that service bulletin if those airplanes have incorporated the modification in Boeing Service Bulletin 777–27–0049 and tightened the PCU attach bolts to the higher torque values given in Boeing Service Bulletin 777–27A0056, Revision 1. The commenter has accomplished the actions specified in Boeing Service Bulletin 777–27–0049 and has tightened the bolts in accordance with Boeing Service Letter 777–SL–27–030, dated January 4, 2001. The commenter asserts that these actions should terminate the proposed inspections for Group 1 airplanes. We disagree. Boeing Service Bulletin 777–27–0049 does not specify doing a detailed inspection of the aft lugs of the yoke assembly for fretting damage, which is required by paragraph (f)(2) of this AD. In addition, we must ensure that the inspections specified in paragraphs (f)(1) through (f)(5) of this AD are accomplished concurrently with tightening the attachment bolts to a PO 00000 Frm 00004 Fmt 4700 Sfmt 4700 higher torque value (the other specified action required by paragraph (f) of this AD). Operators, who installed the new, improved yoke assembly having improved bearing retention, P/N 251W1130–3, but tightened the attachment bolts to the lower torque values specified in the Boeing 777 Airplane Maintenance Manual, have reported finding loose or fretted bolts, and at least one fractured bolt, with significant damage to the yoke and PCU. However, under the provisions of paragraph (k) of this AD, we may consider requests for approval of an alternative method of compliance if sufficient data are submitted to substantiate that such method would provide an acceptable level of safety. Request To Identify Airplanes by Group Number One commenter requests that we revise paragraph (h) of the NPRM to identify the applicable airplanes by group numbers for terminating certain inspections. The commenter states that accomplishing Boeing Service Bulletin 777–27–0049 on Group 1 airplanes terminates the inspections specified in paragraphs (f)(1) through (f)(5) of the NPRM. The commenter also states that accomplishing Boeing Service Bulletin 777–27–0049 on Group 2 and 3 airplanes terminates the inspections specified in paragraphs (f)(3) and (f)(4) of the NPRM. We disagree. As discussed in the previous comment, we have determined that, for Group 1 airplanes, accomplishing the actions in Boeing Service Bulletin 777–27–0049 terminates only the inspections required by paragraphs (f)(3) and (f)(4) of this AD. Consequently, we do not need to distinguish between airplane groups in this regard. In addition, the effectivity of Boeing Service Bulletin 777–27–0049 is different than the effectivity of Boeing Service Bulletin 777–27A0056, Revision 1. Therefore, paragraph (h) of this AD is only applicable to the airplanes identified in the effectivity of Boeing Service Bulletin 777–27–0049. No change is necessary to this AD in this regard. Request To Revise the Difference Paragraph One commenter requests that we revise the last sentence of the difference paragraph in the NPRM. The commenter asserts that the paragraph should state that accomplishing Boeing Service Bulletin 777–27–0049 is an optional terminating action for certain repetitive inspections ‘‘ * * * on certain Model 777–200 and –300 series airplanes.’’ E:\FR\FM\16DER1.SGM 16DER1 Federal Register / Vol. 70, No. 241 / Friday, December 16, 2005 / Rules and Regulations We do not agree to add the additional phrase. Although we agree that the commenter’s statement is true, we do not publish difference paragraphs in a final rule. In addition, no change is needed to paragraph (h) of this AD in this regard, since that paragraph identifies the certain Model 777–200 and –300 series airplanes that are allowed credit for the optional terminating action. Request To Revise ‘‘Costs of Compliance’’ One commenter, an operator, states that the cost impact of the proposed inspections for its fleet is $34,820, per inspection cycle. The commenter states it has completed the proposed inspections on 35 of 45 of its affected airplanes. The commenter has based the cost impact on a figure of 8.5 man-hours to complete the proposed inspection. We infer the commenter would like us to revise the ‘‘Costs of Compliance’’ section of this AD. We disagree. The estimated work hours 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. In this case, we agree with the manufacturer’s estimate; Boeing Service Bulletin 777–27A0056, Revision 1, estimates 4 man-hours to do the inspection. Therefore, no change is necessary to this AD in this regard. Explanation of Changes Made to This AD We have revised the ‘‘Alternative Methods of Compliance (AMOCs)’’ paragraph in this AD to clarify the delegation authority for Authorized Representatives for the Boeing Commercial Airplanes Delegation Option Authorization. We have also revised this AD to clarify the appropriate procedure for notifying the principal inspector before using any approved AMOC on any airplane to which the AMOC applies. Conclusion We have carefully reviewed the available data, including the comments received, and determined that air safety and the public interest require adopting the AD with the changes described previously. We have determined that these changes will neither increase the economic burden on any operator nor increase the scope of the AD. VerDate Aug<31>2005 16:21 Dec 15, 2005 Jkt 208001 Costs of Compliance There are about 483 airplanes of the affected design in the worldwide fleet. This AD affects about 131 airplanes of U.S. registry. The inspections take about 4 work hours per airplane, at an average labor rate of $65 per work hour. Based on these figures, the estimated cost of the inspections for U.S. operators is $34,060, or $260 per airplane, per inspection cycle. The concurrent actions of Boeing Service Bulletin 777–27–0009, if required, take about 7 work hours per airplane. Required parts cost about $12,758 per airplane. Based on these figures, the estimated cost of these concurrent actions is $13,213 per airplane. The concurrent actions of Boeing Service Bulletin 777–27–0049, if required, take about 5 work hours per airplane. Required parts cost about $3,245 per airplane. Based on these figures, the estimated cost of these concurrent actions is $3,570 per airplane. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue rules on aviation safety. Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the Agency’s authority. We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, ‘‘General requirements.’’ Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings We have determined that this AD will not have federalism implications under Executive Order 13132. This 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. For the reasons discussed above, I certify that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866; PO 00000 Frm 00005 Fmt 4700 Sfmt 4700 74643 (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. We prepared a regulatory evaluation of the estimated costs to comply with this AD and placed it in the AD docket. 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, Incorporation by reference, Safety. Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: I PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: I Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The Federal Aviation Administration (FAA) amends § 39.13 by adding the following new airworthiness directive (AD): I 2005–25–24 Boeing: Amendment 39–14417. Docket No. FAA–2005–21356; Directorate Identifier 2004–NM–223–AD. Effective Date (a) This AD becomes effective January 20, 2006. Affected ADs (b) None. Applicability (c) This AD applies to Boeing Model 777– 200 and –300 series airplanes, certificated in any category, as identified in Boeing Service Bulletin 777–27A0056, Revision 1, dated July 8, 2004. Unsafe Condition (d) This AD results from reports indicating that operators have found worn, fretted, and fractured bolts that attach the yoke assembly to the flaperon power control unit (PCU). We are issuing this AD to prevent damage and eventual fracture of the yoke assembly, pin assembly, and attachment bolts that connect the inboard and outboard PCUs to a flaperon, which could lead to the flaperon becoming unrestrained and consequently departing from the airplane. Loss of a flaperon could result in asymmetric lift and reduced roll control of an airplane. A departing flaperon could also cause damage to the horizontal and vertical stabilizers, which could result in loss of control of the airplane if damage is significant. E:\FR\FM\16DER1.SGM 16DER1 74644 Federal Register / Vol. 70, No. 241 / Friday, December 16, 2005 / Rules and Regulations 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. Detailed Inspections (f) At the applicable compliance time(s) specified in Table 1 of this AD, do detailed inspections of the parts specified in paragraphs (f)(1) through (f)(5) of the left inboard, left outboard, right inboard, and right outboard flaperon PCUs; and do any other specified and corrective actions as applicable; by doing all of the actions specified in the Accomplishment Instructions of Boeing Service Bulletin 777– 27A0056, Revision 1, dated July 8, 2004. Do the other specified action and applicable corrective actions before further flight. (1) Forward lugs of the PCU for nicks, gouges, and fretting damage. (2) Aft lugs of the yoke assembly for fretting damage. (3) Aft lugs of the yoke assembly for signs of wear on the anti-rotation lugs, unless paragraph (g) or (h) of this AD, as applicable, has been accomplished. (4) Aft lugs of the yoke assembly bearings for signs of migration or rotation, unless paragraph (g) or (h) of this AD, as applicable, has been accomplished. (5) Attachment hardware for the PCU to yoke assembly for damage. TABLE 1.—COMPLIANCE TIMES Applicable airplanes Initial inspection Group 1 airplanes: Model 777–200 and –300 airplanes powered by General Electric or Pratt & Whitney engines, line numbers (L/ Ns) 1 through 297 inclusive. Before the accumulation of 5,000 total flight cycles since the date of issuance of the original standard airworthiness and certificate or the date of issuance of the original export certificate of airworthiness; or within 12 months after the effective date of this AD; whichever is later. Before the accumulation of 1,000 total flight cycles since the date of issuance of the original standard airworthiness certificate or the date of issuance of the original export certificate of airworthiness; or within 180 days after the effective date of this AD; whichever is later. Before the accumulation of 5,000 total flight hours since the date of issuance of the original standard airworthiness certificate or the date of issuance of the original export certificate of airworthiness; or within 750 days after the effective date of this AD; whichever is later. None. Credit for Pin Replacements of the Outboard Flaperon PCUs Authorization Organization who has been authorized by the Manager, Seattle ACO, to make those findings. For a repair method to be approved, the repair must meet the certification basis of the airplane, and the approval must specifically refer to this AD. Group 2 airplanes: Model 777–200 and –300 airplanes powered by Rolls-Royce engines, L/Ns 1 through 297 inclusive. Group 3 airplanes: Model 777–200 and –300 airplanes powered by Rolls-Royce engines, L/Ns 298 and subsequent. Concurrent Actions for Certain Airplanes (g) For Model 777–200 series airplanes identified in Boeing Service Bulletin 777–27– 0009, Revision 1, dated May 8, 2003: Before or concurrently with accomplishing paragraph (f) of this AD, replace the yoke assemblies and pins of the left inboard, left outboard, right inboard, and right outboard flaperon PCUs with new, improved yoke assemblies and pins by doing all of the actions specified in the Accomplishment Instructions of Boeing Service Bulletin 777– 27–0009, Revision 1, dated May 8, 2003; except where the service bulletin specifies installing yoke assembly having part number (P/N) 251W1130–1, install yoke assembly having P/N 251W1130–3. Optional Terminating Action for Certain Repetitive Inspections (h) For Model 777–200 and –300 series airplanes identified in Boeing Service Bulletin 777–27–0049, dated August 30, 2001: Replacing the yoke assemblies of the left inboard, left outboard, right inboard, and right outboard flaperon PCUs with new, improved yoke assemblies having improved bearing retention, and doing any other specified and corrective actions, by doing all of the actions specified in the Accomplishment Instructions of Boeing Service Bulletin 777–27–0049, dated August 30, 2001, terminates the detailed inspections required by paragraphs (f)(3) and (f)(4) of this AD. VerDate Aug<31>2005 16:21 Dec 15, 2005 Jkt 208001 Repetitive inspections (i) Accomplishment of the actions specified in paragraph (b) or (d) of AD 99– 13–05, amendment 39–11198, before the effective date of this AD is acceptable for compliance with the pin replacements of the left and right outboard flaperon PCUs required by paragraph (g) of this AD. Parts Installation (j) As of the effective date of this AD, no person may install on any airplane the following parts: Yoke assembly having P/N S251W115–3 or P/N 251W1130–1; and pin having P/N S251W115–2. Alternative Methods of Compliance (AMOCs) (k)(1) The Manager, Seattle Aircraft Certification Office (ACO), 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. (3) An AMOC that provides an acceptable level of safety may be used for any repair required by this AD, if it is approved by an Authorized Representative for the Boeing Commercial Airplanes Delegation Option PO 00000 Frm 00006 Fmt 4700 Sfmt 4700 At intervals not to exceed 5,000 flight hours or 750 days, whichever is later. At intervals not to exceed 5,000 flight hours or 750 days, whichever is later. Material Incorporated by Reference (l) You must use Boeing Service Bulletin 777–27A0056, Revision 1, dated July 8, 2004; and Boeing Service Bulletin 777–27–0009, Revision 1, dated May 8, 2003, as applicable, to perform the actions that are required by this AD, unless the AD specifies otherwise. The optional terminating action provided by paragraph (h) of this AD, if accomplished, must be done in accordance with Boeing Service Bulletin 777–27–0049, dated August 30, 2001. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for a copy of this service information. You may review copies at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., room PL–401, Nassif Building, Washington, DC; on the Internet at https://dms.dot.gov; or at the National Archives and Records Administration (NARA). For information on the availability of this material at the NARA, call (202) 741– 6030, or go to https://www.archives.gov/ federal_register/code_of_federal_regulations/ ibr_locations.html. E:\FR\FM\16DER1.SGM 16DER1 Federal Register / Vol. 70, No. 241 / Friday, December 16, 2005 / Rules and Regulations Issued in Renton, Washington, December 6, 2005. Kevin M. Mullin, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 05–24050 Filed 12–15–05; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2005–21716; Directorate Identifier 2005–NM–080–AD; Amendment 39–14418; AD 2005–25–25] RIN 2120–AA64 Airworthiness Directives; Boeing Model 767–200, –300, and –300F Series Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 767–200, –300, and –300F series airplanes. This AD requires replacing the aileron control override quadrant with a modified unit. This AD results from a report of the seizing of the input override mechanism bearings of the lateral central control actuator on affected airplanes. We are issuing this AD to prevent corrosion of the input override mechanism bearings of the lateral central control actuator, which, in the event of a subsequent jam in the pilot’s aileron control system, could result in failure of the aileron override system and consequent reduced lateral controllability of the airplane. DATES: This AD becomes effective January 20, 2006. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of January 20, 2006. ADDRESSES: You may examine the 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., Nassif Building, Room PL–401, Washington, DC. Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124–2207, for service information identified in this AD. FOR FURTHER INFORMATION CONTACT: Douglas Tsuji, Aerospace Engineer, Systems and Equipment Branch, ANM– 130S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, VerDate Aug<31>2005 16:21 Dec 15, 2005 Jkt 208001 Washington 98055–4056; telephone (425) 917–6487; fax (425) 917–6590. SUPPLEMENTARY INFORMATION: Examining the Docket You may examine the airworthiness directive (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 street address stated in the ADDRESSES section. Discussion The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to certain Boeing Model 767–200, –300, and –300F series airplanes. That NPRM was published in the Federal Register on July 6, 2005 (70 FR 38819). That NPRM proposed to require replacing the aileron control override quadrant with a modified unit. Comments We provided the public the opportunity to participate in the development of this AD. We have considered the comments received. Support for the Proposed AD Two commenters express support for the proposed AD. Request To Extend Compliance Time One commenter, an airplane operator, requests that the proposed compliance time for replacing the aileron control override quadrant be extended from 18 months after the effective date of the AD to 21 months after the effective date of the AD. The commenter states that the 18-month compliance time will create undue economic hardship because it’s ‘‘C’’ check interval has been extended to 21 months. We do not agree with the commenter’s request to extend the compliance time. In developing an appropriate compliance time for this action we considered the urgency associated with the subject unsafe condition, and the practical aspect of accomplishing the required modification within a period of time that corresponds to the normal scheduled maintenance for most affected operators. Since maintenance schedules vary from operator to operator, it is not possible to guarantee that all affected airplanes could be modified during scheduled maintenance, even if we extended the compliance time to 21 months. We find that an 18-month compliance time PO 00000 Frm 00007 Fmt 4700 Sfmt 4700 74645 represents the maximum time in which the affected airplanes may continue to operate without compromising safety. We also note that economic hardship is not sufficient rationale for demonstrating that an extended compliance time would provide an acceptable level of safety. However, according to the provisions of paragraph (h) of the final rule, we may approve requests to adjust the compliance time if the request includes data to substantiate that the new compliance time would provide an acceptable level of safety. No change to the final rule is necessary. Request To Correct Wording in ‘‘Relevant Service Information’’ Section One commenter notes that the ‘‘Relevant Service Information’’ section of the proposed AD should be corrected to state that Revision 1 of Boeing Alert Service Bulletin 767–27A0175, dated June 3, 2004, increased the effectivity rather than Revision 2, of Boeing Service Bulletin 767–27A0175, dated August 5, 2004, as is currently stated in that section. The commenter points out that Revision 1 of the alert service bulletin increased the applicability and that this applicability was continued in Revision 2 of the service bulletin. We partially agree with the commenter. We agree that the additional airplanes (line number 837 through 918) were added to Revision 1 rather than Revision 2 of the service bulletin, and we have revised paragraphs (f) and (i) of the final rule accordingly. However, since the ‘‘Relevant Service Information’’ section of the preamble does not reappear in the final rule, we have not revised that section. Request To Revise Cost Estimate One commenter disagrees with the projected costs to accomplish the proposed replacement of the aileron control override quadrant. The commenter states that its actual costs to do the replacement have been $1,068 per airplane rather than $796, which was the cost proposed in the NPRM. We infer that the commenter would like the cost estimate to be revised to closer reflect its actual costs. We acknowledge the commenter’s concerns, but disagree with revising the cost estimate. Although the operator has tracked its own costs based on data it kept when accomplishing related AD 2003–15–03, amendment 39–13245 (68 FR 44197, July 28, 2003), the commenter does not state how the additional costs were accrued (e.g., additional labor, parts, etc.). We acknowledge that the costs associated with doing the required actions can vary depending on if the E:\FR\FM\16DER1.SGM 16DER1

Agencies

[Federal Register Volume 70, Number 241 (Friday, December 16, 2005)]
[Rules and Regulations]
[Pages 74641-74645]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-24050]

[[Page 74641]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2005-21356; Directorate Identifier 2004-NM-223-AD;
Amendment 39-14417; AD 2005-25-24]
RIN 2120-AA64

Airworthiness Directives; Boeing Model 777-200 and -300 Series
Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Boeing Model 777-200 and -300 series airplanes. This AD
requires repetitive detailed inspections of the forward lugs of the
power control unit (PCU), yoke assembly, and forward attachment
hardware of the left inboard, left outboard, right inboard, and right
outboard flaperon PCUs; and other specified/corrective actions if
necessary. For certain airplanes, this AD also requires other related
concurrent actions. This AD results from reports indicating that
operators have found worn, fretted, and fractured bolts that attach the
yoke assembly to the flaperon PCU. We are issuing this AD to prevent
damage and eventual fracture of the yoke assembly, pin assembly, and
attachment bolts that connect the inboard and outboard PCUs to a
flaperon, which could lead to the flaperon becoming unrestrained and
consequently departing from the airplane. Loss of a flaperon could
result in asymmetric lift and reduced roll control of an airplane. A
departing flaperon could also cause damage to the horizontal and
vertical stabilizers, which could result in loss of control of the
airplane if damage is significant.

DATES: This AD becomes effective January 20, 2006.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in the AD as of January 20,
2006.

ADDRESSES: You may examine the 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., Nassif Building,
room PL-401, Washington, DC.
Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle,
Washington 98124-2207, for service information identified in this AD.

FOR FURTHER INFORMATION CONTACT: Gary Oltman, Aerospace Engineer,
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425)
917-6443; fax (425) 917-6590.

SUPPLEMENTARY INFORMATION:

Examining the Docket

You may examine the airworthiness directive (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 street address stated in the ADDRESSES section.

Discussion

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to include an AD that would apply to certain Boeing Model
777-200 and -300 series airplanes. That NPRM was published in the
Federal Register on June 3, 2005 (70 FR 32524). That NPRM proposed to
require repetitive detailed inspections of the forward lugs of the
power control unit (PCU), yoke assembly, and forward attachment
hardware of the left inboard, left outboard, right inboard, and right
outboard flaperon PCUs; and other specified/corrective actions if
necessary. For certain airplanes, the NPRM also proposed to require
other related concurrent actions.

Comments

We provided the public the opportunity to participate in the
development of this AD. We have considered the comments received.

Request To Revise Compliance Time for Certain Airplanes

Two commenters request that we revise the compliance times of the
initial and repetitive inspections for Model 777-200 and -300 series
airplanes powered by Rolls-Royce engines. Both commenters state that
the initial inspection in the third row of Table 1 of the NPRM should
be specified in flight hours. One commenter, the airplane manufacturer,
states that the repetitive inspections in the second and third rows of
Table 1 of the NPRM should also be specified in flight hours. The
commenters point out that these revisions are consistent with what is
recommended in Boeing Service Bulletin 777-27A0056, Revision 1, dated
July 8, 2004.
We agree. We did not intend to differ from the compliance time
recommended in the service bulletin. Therefore, we have revised the
compliance times of the initial inspection in the third row of Table 1
of this AD and the repetitive inspection interval in the second and
third rows of Table 1 of this AD.

Request To Clarify Certain Compliance Times

One commenter requests that we clarify when the compliance time
clock starts for the initial inspections of the Model 777-200 and -300
series airplanes powered by Rolls-Royce engines. These compliance times
are listed in rows 2 and 3, of the second column of Table 1 of the
NPRM. The commenter states that, according to Boeing Service Bulletin
777-27A0056, Revision 1, the clock for measuring flight cycles and
flight hours should start from the date of airplane delivery. The
commenter asserts that compliance times as written in the NPRM do not
clearly state that.
We agree. We have revised the compliance times in rows 1, 2, and 3,
of the second column of Table 1 of this AD to specify that the
threshold of the initial inspection should be measured from ``* * * the
date of issuance of the original standard airworthiness certificate or
the date of issuance of the original export certificate of
airworthiness.''

Request To Add Line Numbers (L/Ns) to Table 1

One commenter, the manufacturer, requests that we make the
following changes to Table 1 of the NPRM:
In row 1 of the first column, add L/Ns 1 through 297
inclusive for Model 777-200 and -300 airplanes powered by General
Electric or Pratt & Whitney engines.
In row 2 of the first column, add L/Ns 1 through 297
inclusive for Model 777-200 and -300 airplanes powered by Rolls-Royce
engines.
In row 3 of the first column, add L/Ns 298 and subsequent
for Model 777-200 and -300 airplanes powered by Rolls-Royce engines.
In row 2 of the second column, add the phrase ``* * * date
of this AD, whichever is later.''
For clarification we agree to add ``L/Ns 1 through 297 inclusive''
to row 1 of the first column of Table 1 of this AD. We have verified
that the commenter's other proposed changes were included in the NPRM,
as published in the Federal Register on June 3, 2005. That information
is retained in this AD, so no additional change to this AD is necessary
in this regard.

[[Page 74642]]

Request To Identify Engine Type

One commenter requests that, for the proposed initial and
repetitive inspections, we clarify whether the applicable airplanes are
powered by General Electric, Pratt & Whitney, or Rolls-Royce engines.
The commenter states that Boeing Service Bulletin 777-27A0056, Revision
1, identifies the applicable airplanes as Group 1, 2, or 3 airplanes
with the inspection details.
We agree. We have revised Table 1 of this AD to identify the
affected airplanes as Group 1, 2, or 3 airplanes, in addition to
including the line numbers and engine types. With the changes discussed
previously, this information is consistent with what is specified in
the effectivity of Boeing Service Bulletin 777-27A0056, Revision 1.

Request To Delete Compliance Time for Corrective Actions

One commenter requests that we delete the last sentence of
paragraph (f) of the NPRM: ``Do the applicable corrective actions
before further flight.'' The commenter states that this sentence
conflicts with the compliance times in Table 1 of the NPRM.
We do not agree to delete the sentence. Table 1 of this AD
specifies compliance times for doing the initial and repetitive
inspections. The last sentence of paragraph (f) of this AD specifies
the compliance time for doing the corrective actions if, during any
inspection, any damage to the attachment hardware, PCU lug, or yoke
assembly is found, or a migrated or rotated bearing is found. We
defined these corrective actions in the ``Relevant Service
Information'' paragraph of the NPRM. These corrective actions must be
done before further flight after finding damage.
We inadvertently omitted the compliance time for the other
specified action, which is tightening the attachment bolts to a higher
torque value. The other specified action must also be done before
further flight after accomplishing the inspections specified in
paragraphs (f)(1) through (f)(5) of this AD. Therefore, we have added
that action to the last sentence of paragraph (f) of this AD.

Request To Add Concurrent Requirement

One commenter requests that we delete reference to Boeing Service
Bulletin 777-27-0049, dated August 30, 2001, from paragraph (h) of the
NPRM, and add it to paragraph (g) of the NPRM. As justification, the
commenter states that Boeing Service Bulletin 777-27A0056, Revision 1,
recommends accomplishing both Boeing Service Bulletin 777-27-0009,
Revision 1, dated May 8, 2003, and Boeing Service Bulletin 777-27-0049
concurrently with Boeing Service Bulletin 777-27A0056, Revision 1.
We disagree. As we stated in the difference paragraph of the NPRM,
this AD does not require concurrent accomplishment of Boeing Service
Bulletin 777-27-0049. Instead, paragraph (g) of this AD requires
concurrent accomplishment of Boeing Service Bulletin 777-27-0009,
Revision 1, with the exception to install new, improved steel yoke
assemblies having improved bearing retention, part number (P/N)
251W1130-3. We have determined that installing P/N 251W1130-3
concurrently with doing the detailed inspections of the forward lugs of
the PCU and of the attachment hardware for damage (required by
paragraphs (f)(1) and (f)(5) of this AD), in accordance with Boeing
Service Bulletin 777-27A0056, Revision 1, adequately addresses the
concurrent requirements identified in Boeing Service Bulletin 777-27-
0049. Therefore, no change to this AD is necessary in this regard.

Request for Credit for Group 1 Airplanes

One commenter requests that we revise paragraph (h) of the NPRM to
give credit to Group 1 airplanes for the inspections specified in
paragraphs (f)(1) through (f)(5) of the NPRM. The commenter points out
that Note 3 in the Accomplishment Instructions of Boeing Service
Bulletin 777-27A0056, Revision 1, states that Group 1 airplanes have
accomplished the intent of that service bulletin if those airplanes
have incorporated the modification in Boeing Service Bulletin 777-27-
0049 and tightened the PCU attach bolts to the higher torque values
given in Boeing Service Bulletin 777-27A0056, Revision 1. The commenter
has accomplished the actions specified in Boeing Service Bulletin 777-
27-0049 and has tightened the bolts in accordance with Boeing Service
Letter 777-SL-27-030, dated January 4, 2001. The commenter asserts that
these actions should terminate the proposed inspections for Group 1
airplanes.
We disagree. Boeing Service Bulletin 777-27-0049 does not specify
doing a detailed inspection of the aft lugs of the yoke assembly for
fretting damage, which is required by paragraph (f)(2) of this AD. In
addition, we must ensure that the inspections specified in paragraphs
(f)(1) through (f)(5) of this AD are accomplished concurrently with
tightening the attachment bolts to a higher torque value (the other
specified action required by paragraph (f) of this AD). Operators, who
installed the new, improved yoke assembly having improved bearing
retention, P/N 251W1130-3, but tightened the attachment bolts to the
lower torque values specified in the Boeing 777 Airplane Maintenance
Manual, have reported finding loose or fretted bolts, and at least one
fractured bolt, with significant damage to the yoke and PCU. However,
under the provisions of paragraph (k) of this AD, we may consider
requests for approval of an alternative method of compliance if
sufficient data are submitted to substantiate that such method would
provide an acceptable level of safety.

Request To Identify Airplanes by Group Number

One commenter requests that we revise paragraph (h) of the NPRM to
identify the applicable airplanes by group numbers for terminating
certain inspections. The commenter states that accomplishing Boeing
Service Bulletin 777-27-0049 on Group 1 airplanes terminates the
inspections specified in paragraphs (f)(1) through (f)(5) of the NPRM.
The commenter also states that accomplishing Boeing Service Bulletin
777-27-0049 on Group 2 and 3 airplanes terminates the inspections
specified in paragraphs (f)(3) and (f)(4) of the NPRM.
We disagree. As discussed in the previous comment, we have
determined that, for Group 1 airplanes, accomplishing the actions in
Boeing Service Bulletin 777-27-0049 terminates only the inspections
required by paragraphs (f)(3) and (f)(4) of this AD. Consequently, we
do not need to distinguish between airplane groups in this regard. In
addition, the effectivity of Boeing Service Bulletin 777-27-0049 is
different than the effectivity of Boeing Service Bulletin 777-27A0056,
Revision 1. Therefore, paragraph (h) of this AD is only applicable to
the airplanes identified in the effectivity of Boeing Service Bulletin
777-27-0049. No change is necessary to this AD in this regard.

Request To Revise the Difference Paragraph

One commenter requests that we revise the last sentence of the
difference paragraph in the NPRM. The commenter asserts that the
paragraph should state that accomplishing Boeing Service Bulletin 777-
27-0049 is an optional terminating action for certain repetitive
inspections `` * * * on certain Model 777-200 and -300 series
airplanes.''

[[Page 74643]]

We do not agree to add the additional phrase. Although we agree
that the commenter's statement is true, we do not publish difference
paragraphs in a final rule. In addition, no change is needed to
paragraph (h) of this AD in this regard, since that paragraph
identifies the certain Model 777-200 and -300 series airplanes that are
allowed credit for the optional terminating action.

Request To Revise ``Costs of Compliance''

One commenter, an operator, states that the cost impact of the
proposed inspections for its fleet is $34,820, per inspection cycle.
The commenter states it has completed the proposed inspections on 35 of
45 of its affected airplanes. The commenter has based the cost impact
on a figure of 8.5 man-hours to complete the proposed inspection. We
infer the commenter would like us to revise the ``Costs of Compliance''
section of this AD.
We disagree. The estimated work hours 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. In this case, we agree with the manufacturer's estimate;
Boeing Service Bulletin 777-27A0056, Revision 1, estimates 4 man-hours
to do the inspection. Therefore, no change is necessary to this AD in
this regard.

Explanation of Changes Made to This AD

We have revised the ``Alternative Methods of Compliance (AMOCs)''
paragraph in this AD to clarify the delegation authority for Authorized
Representatives for the Boeing Commercial Airplanes Delegation Option
Authorization.
We have also revised this AD to clarify the appropriate procedure
for notifying the principal inspector before using any approved AMOC on
any airplane to which the AMOC applies.

Conclusion

We have carefully reviewed the available data, including the
comments received, and determined that air safety and the public
interest require adopting the AD with the changes described previously.
We have determined that these changes will neither increase the
economic burden on any operator nor increase the scope of the AD.

Costs of Compliance

There are about 483 airplanes of the affected design in the
worldwide fleet. This AD affects about 131 airplanes of U.S. registry.
The inspections take about 4 work hours per airplane, at an average
labor rate of $65 per work hour. Based on these figures, the estimated
cost of the inspections for U.S. operators is $34,060, or $260 per
airplane, per inspection cycle.
The concurrent actions of Boeing Service Bulletin 777-27-0009, if
required, take about 7 work hours per airplane. Required parts cost
about $12,758 per airplane. Based on these figures, the estimated cost
of these concurrent actions is $13,213 per airplane.
The concurrent actions of Boeing Service Bulletin 777-27-0049, if
required, take about 5 work hours per airplane. Required parts cost
about $3,245 per airplane. Based on these figures, the estimated cost
of these concurrent actions is $3,570 per airplane.

Authority for This Rulemaking

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

Regulatory Findings

We have determined that this AD will not have federalism
implications under Executive Order 13132. This 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.
For the reasons discussed above, I certify that this AD:
(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.
We prepared a regulatory evaluation of the estimated costs to
comply with this AD and placed it in the AD docket. 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, Incorporation by
reference, Safety.

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator,
the FAA amends 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. The Federal Aviation Administration (FAA) amends Sec. 39.13 by
adding the following new airworthiness directive (AD):

2005-25-24 Boeing: Amendment 39-14417. Docket No. FAA-2005-21356;
Directorate Identifier 2004-NM-223-AD.

Effective Date

(a) This AD becomes effective January 20, 2006.

Affected ADs

(b) None.

Applicability

(c) This AD applies to Boeing Model 777-200 and -300 series
airplanes, certificated in any category, as identified in Boeing
Service Bulletin 777-27A0056, Revision 1, dated July 8, 2004.

Unsafe Condition

(d) This AD results from reports indicating that operators have
found worn, fretted, and fractured bolts that attach the yoke
assembly to the flaperon power control unit (PCU). We are issuing
this AD to prevent damage and eventual fracture of the yoke
assembly, pin assembly, and attachment bolts that connect the
inboard and outboard PCUs to a flaperon, which could lead to the
flaperon becoming unrestrained and consequently departing from the
airplane. Loss of a flaperon could result in asymmetric lift and
reduced roll control of an airplane. A departing flaperon could also
cause damage to the horizontal and vertical stabilizers, which could
result in loss of control of the airplane if damage is significant.

[[Page 74644]]

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.

Detailed Inspections

(f) At the applicable compliance time(s) specified in Table 1 of
this AD, do detailed inspections of the parts specified in
paragraphs (f)(1) through (f)(5) of the left inboard, left outboard,
right inboard, and right outboard flaperon PCUs; and do any other
specified and corrective actions as applicable; by doing all of the
actions specified in the Accomplishment Instructions of Boeing
Service Bulletin 777-27A0056, Revision 1, dated July 8, 2004. Do the
other specified action and applicable corrective actions before
further flight.
(1) Forward lugs of the PCU for nicks, gouges, and fretting
damage.
(2) Aft lugs of the yoke assembly for fretting damage.
(3) Aft lugs of the yoke assembly for signs of wear on the anti-
rotation lugs, unless paragraph (g) or (h) of this AD, as
applicable, has been accomplished.
(4) Aft lugs of the yoke assembly bearings for signs of
migration or rotation, unless paragraph (g) or (h) of this AD, as
applicable, has been accomplished.
(5) Attachment hardware for the PCU to yoke assembly for damage.

Table 1.--Compliance Times
------------------------------------------------------------------------
Repetitive
Applicable airplanes Initial inspection inspections
------------------------------------------------------------------------
Group 1 airplanes: Model 777-200 Before the None.
and -300 airplanes powered by accumulation of
General Electric or Pratt & 5,000 total
Whitney engines, line numbers flight cycles
(L/Ns) 1 through 297 inclusive. since the date of
issuance of the
original standard
airworthiness and
certificate or
the date of
issuance of the
original export
certificate of
airworthiness; or
within 12 months
after the
effective date of
this AD;
whichever is
later.
Group 2 airplanes: Model 777-200 Before the At intervals not
and -300 airplanes powered by accumulation of to exceed 5,000
Rolls-Royce engines, L/Ns 1 1,000 total flight hours or
through 297 inclusive. flight cycles 750 days,
since the date of whichever is
issuance of the later.
original standard
airworthiness
certificate or
the date of
issuance of the
original export
certificate of
airworthiness; or
within 180 days
after the
effective date of
this AD;
whichever is
later.
Group 3 airplanes: Model 777-200 Before the At intervals not
and -300 airplanes powered by accumulation of to exceed 5,000
Rolls-Royce engines, L/Ns 298 5,000 total flight hours or
and subsequent. flight hours 750 days,
since the date of whichever is
issuance of the later.
original standard
airworthiness
certificate or
the date of
issuance of the
original export
certificate of
airworthiness; or
within 750 days
after the
effective date of
this AD;
whichever is
later.
------------------------------------------------------------------------

Concurrent Actions for Certain Airplanes

(g) For Model 777-200 series airplanes identified in Boeing
Service Bulletin 777-27-0009, Revision 1, dated May 8, 2003: Before
or concurrently with accomplishing paragraph (f) of this AD, replace
the yoke assemblies and pins of the left inboard, left outboard,
right inboard, and right outboard flaperon PCUs with new, improved
yoke assemblies and pins by doing all of the actions specified in
the Accomplishment Instructions of Boeing Service Bulletin 777-27-
0009, Revision 1, dated May 8, 2003; except where the service
bulletin specifies installing yoke assembly having part number (P/N)
251W1130-1, install yoke assembly having P/N 251W1130-3.

Optional Terminating Action for Certain Repetitive Inspections

(h) For Model 777-200 and -300 series airplanes identified in
Boeing Service Bulletin 777-27-0049, dated August 30, 2001:
Replacing the yoke assemblies of the left inboard, left outboard,
right inboard, and right outboard flaperon PCUs with new, improved
yoke assemblies having improved bearing retention, and doing any
other specified and corrective actions, by doing all of the actions
specified in the Accomplishment Instructions of Boeing Service
Bulletin 777-27-0049, dated August 30, 2001, terminates the detailed
inspections required by paragraphs (f)(3) and (f)(4) of this AD.

Credit for Pin Replacements of the Outboard Flaperon PCUs

(i) Accomplishment of the actions specified in paragraph (b) or
(d) of AD 99-13-05, amendment 39-11198, before the effective date of
this AD is acceptable for compliance with the pin replacements of
the left and right outboard flaperon PCUs required by paragraph (g)
of this AD.

Parts Installation

(j) As of the effective date of this AD, no person may install
on any airplane the following parts: Yoke assembly having P/N
S251W115-3 or P/N 251W1130-1; and pin having P/N S251W115-2.

Alternative Methods of Compliance (AMOCs)

(k)(1) The Manager, Seattle Aircraft Certification Office (ACO),
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.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair required by this AD, if it is approved by an
Authorized Representative for the Boeing Commercial Airplanes
Delegation Option Authorization Organization who has been authorized
by the Manager, Seattle ACO, to make those findings. For a repair
method to be approved, the repair must meet the certification basis
of the airplane, and the approval must specifically refer to this
AD.

Material Incorporated by Reference

(l) You must use Boeing Service Bulletin 777-27A0056, Revision
1, dated July 8, 2004; and Boeing Service Bulletin 777-27-0009,
Revision 1, dated May 8, 2003, as applicable, to perform the actions
that are required by this AD, unless the AD specifies otherwise. The
optional terminating action provided by paragraph (h) of this AD, if
accomplished, must be done in accordance with Boeing Service
Bulletin 777-27-0049, dated August 30, 2001. The Director of the
Federal Register approved the incorporation by reference of these
documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51.
Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle,
Washington 98124-2207, for a copy of this service information. You
may review copies at the Docket Management Facility, U.S. Department
of Transportation, 400 Seventh Street, SW., room PL-401, Nassif
Building, Washington, DC; on the Internet at https://dms.dot.gov; or
at the National Archives and Records Administration (NARA). For
information on the availability of this material at the NARA, call
(202) 741-6030, or go to https://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

[[Page 74645]]

Issued in Renton, Washington, December 6, 2005.
Kevin M. Mullin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 05-24050 Filed 12-15-05; 8:45 am]
BILLING CODE 4910-13-P

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