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70 FR 74641 - Airworthiness Directives; Boeing Model 777-200 and -300 Series Airplanes
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Publication Title |
Federal Register Volume
70, Issue 241
(December 16, 2005)
|
Category | Regulatory Information |
Collection | Federal Register |
SuDoc Class Number | AE 2.7: GS 4.107: AE 2.106: |
Publisher | Office of the Federal Register, National Archives and Records Administration |
Section | Rules and Regulations |
Action | Final rule. |
Dates | This AD becomes effective January 20, 2006. |
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. |
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. |
Agency Names | DEPARTMENT OF TRANSPORTATION Federal Aviation Administration |
Page Number Range | 74641-74645 |
Federal Register Citation | 70
FR
74641 |
RIN Number | 2120-AA64 |
CFR Citation | 14
CFR
39 |
Docket Numbers | Docket No. FAA-2005-21356, Directorate Identifier 2004-NM-223-AD, Amendment 39-14417, AD 2005-25-24 |
FR Doc Number | 05-24050 |
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This is part of
Federal Register Volume
70, Issue 241
(December 16, 2005)
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