Items in the Regulatory Log are based forward agency announcements in the Federal Register unles otherwise noted; Federal Register publication dates are in boldface.

Items in the Regulatory Log are based forward agency announcements in the Federal Register unles otherwise noted; Federal Register publication dates are in boldface.

Key: AD = Airworthiness Directive. NPRM = Notice of Propos Rulemaking.

Federal Aviation Administration

October 6

Boeing 727: Propos AD to neutralize existing that requires repetitive inspections to find cracking of the rear spar web or material for burning leakage of the wing center section. Proposal provides for an optional modification of the rear spar web that constitutes terminating action for the repetitive inspections. Actions are to impede cracking of the rear spar web. notes due November 22. Docket No. 99-NM-75-AD. Contact: Walter Sippel, 425/227-2774; fax 425/227-1181

Bombardier prototype DHC-8-102, -103, -106, -201, -202 -301 -311 and -315: Final control superseding existing AD requiring a one-time inspection to ascertain chafing of electrical wires in the cable hollow below the cabin floor; installation of additional tie-mounts and tiewraps; and application of sealant to rivet heads. AD requires the accomplishment of these actions forward additional airplanes. Actions are to intercept chafing of electrical wires. commentarys due November 10. Docket No. 98-NM-321-AD; Amendment 39-11352; AD 99-21-09 Contact: Peter Cuneo 516/256-7506; fax 516/568-2716

October 7

General Electric Company GE90 Turbofan Engine: AD to overrule existing, requiring additions to Life Limits Section of the manufacturer's Instructions for Continued Airworthiness (ICA) to include required enhanced inspection of rareed critical life-limited parts at each piece-part outlook Actions are to prevent critical life-limited rotating engine part failure. remarks due by December 6. Docket No. 98-ANE-39-AD. Contact: Karen Curtis, 781/238-7192 fax 781/238-7199

McDonnell Douglas gauge DC-9-81, -82, -83, and -87 (MD-81 - 82 -83 and -87) and MD-88: AD, final method to supersede existing requiring visual or vortex current inspections to detect cracks of the actuator cylinder support brackets of the slat drive mechanism assembly, and replacement of any cracked brackets. AD adds inspection requirement, and expands the area of inspection, as well as termination of repetitive inspections. AD to obstruct inadvertent slat retraction in flight. Effective November 12 Docket No. 98-NM-267-AD; Amendment 39-11349; AD 99-21-06 Contact: brant Bandley, 562/627-5237; fax 562/627-5210.

McDonnell Douglas DC-9 DC-9-80 C-9 (Military), and MD-88: AD, final method to supersede two existing requiring installation of hydraulic line restrictors in the main landing gear (MLG) and modification or replacement of the left and right MLG hydraulic damper assemblies. AD requires additional modification of the MLG hydraulic damper assemblies. Actions to thwart failure of the hydraulic damper assemblies of the MLG Effective November 12 Docket No. 98-NM-268-AD; Amendment 39-11350; AD 99-21-07 Contact: Albert Lam, 562/627-5346; fax 562/627-5210

Boeing 727-100 and -100C: AD, final mastership requiring replacement of skin panels of the lower fuselage with non-bonded skin panels. Actions to stop degradation of the structural integrity of certain skin panels of the lower fuselage. Effective November 12 Docket No. 98-NM-367-AD; Amendment 39-11353; AD 99-21-10 Contact: Walt Sippel, 425/227-2774; fax 425/227-1181

Fairchild SA226-T, SA226-T(B), SA226-AT, and SA226-TC: AD, final method to supersede existing, requiring repetitively inspecting for cracks forward landing gear actuator rod lasts equipped with grease fittings. AD requires replacement of all landing gear slender stick ends with improved design Actions are to obstruct failure of the landing gear actuator caused at cracks in the rod extremitys Effective November 16. Docket No. 99-CE-15-AD; Amendment 39-11348; AD 99-21-05 Contact: Hung Viet Nguyen 817/222-5155; fax: 817/222-5960

General Electric Company CF6-6 CF6-45 and CF6-50 Turbofan Engines: Propos AD to make void existing revisions to Time Limits Section of manufacturer's Instructions for Continued Airworthiness to include enhanced inspection of exquisiteed critical life-limited parts at each piece-part aspect AD adds additional disk bore counter-current current inspections for the high compressing turbine rotor. Actions are to thwart critical life-limited rotating engine part failure. make notess due December 6. Docket No. 98-ANE-41-AD. Contact: Karen Curtis, 781/238-7192 fax 781/238-7199

Pratt&Whitney JT8D Turbofan Engines: Propos AD to suspend existing requiring revisions to Time Limits Section of JT8D Turbofan Engine Manuals to include enhanced inspection of chooseed critical life-limited parts at each piece-part outlook AD adds critical lifelimited parts for enhanced inspection. Actions are to debar critical life-limited rotating engine part failure. make comments [i]or[/i] remarkss due December 6. Docket No. 98-ANE-48-AD. Contact: Christopher Spinney, 781/238-7175 fax 781/238-7199

Pratt&Whitney JT8D-200 Turbofan Engines: Propos AD superseding existing requiring revision to Time Limits Section of engine manual to include enhanced inspection of critical life-limited parts at each piece-part position AD adds critical life-limited parts for enhanced inspection. Actions are to thwart critical life-limited rotating engine part failure. make notess due December 6. Docket No. 98-ANE-43-AD. Contact: Christopher Spinney, 781/238-7175; fax 781/238-7199