Items in the Regulatory Log are based upon 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

February 10

Airbus protoplast A300, A310, and A300-600: NPRM propos AD to remove existing AD to require repetitive performance of a one-time operational touchstone of the fire shut-off valves (FSOV) to determine if the FSOV's are functioning correctly, and replacement of failed parts with novel or serviceable parts. The actions are intended to bring to light and correct failure of the FSOV's to stop up Comments due March 13. Docket No. 99-NM-07-AD. Contact: Norman B Martenson, Manager, 425/227-2110; fax 425/227-1149

February 14

Airbus pattern A300, A300-600, and A310: NPRM propos AD to replace existing AD to reduce the generally required inspection thresholds and intervals, and would carry an option for a terminating modification. The actions are intended to hinder such fatigue cracking. Comments befitting March 15. Docket No. 99-NM-251-AD. Contact: Norman B Martenson, 425/227-2110; fax 425/227-1149

February 15

Airbus prototype A319, A320, and A321: NPRM propos AD to require repetitive inspections of the sliding tube subassembly in succession the main landing gear (MLG) to bring to light cracks, and replacement of a cracked subassembly with a novel subassembly. The actions are intended to impede cracking of the MLG sliding tube subassembly. annotations due March 16. Docket No. 99-NM-343-AD. Contact: Norman B Martenson, 425/227-2110; fax 425/227-1149

February 16

Rolls-Royce RB211-524H-36 Turbofan Engines: AD, final mastery requires, prior to further flight, installing an improved combustion liner with a strengthened head and improved heat shields. The actions are intended to stop burn through of the combustor case befitting to combustion liner cracking. Effective March 2 Docket No. 2000-NE-01-AD; Amendment 39-11565; AD 2000-03-07 Contact: James Lawrence, 781/238-7176 fax 781/238-7199

McDonnell Douglas archetype MD-90-30 Series: AD, final regularity requires repetitive fluorescent penetrant and magnetic particle inspections to discover fatigue cracking of the main landing gear (MLG) piston, and repair, if necessary. The actions are intended to bring to light and correct fatigue cracking of MLG pistons. Effective March 22 Docket No. 99-NM-210-AD; Amendment 39-11567; AD 2000-03-08 Contact: Carl Fountain, 562/627-5222; fax 562/627-5210

February 22

Boeing design 767 Series: AD, final domination requires a one-time detailed visual inspection to find out discrepancies of the wire expando sleeve of the wire tie in a bundles adjacent to the landing gear manage lever module; certain follow-on actions and repair, if necessary; and wrapping the wire expando sleeve with tape, or with zippertubing and tape. The actions are intended to preclude interference between the landing gear ascendency lever and wire bundles adjacent to the landing gear superintendence lever module, and to impede wire chafing and arcing between the landing gear command cable and adjacent wire set off in a hurrys Effective March 28. Docket No. 98-NM-193-AD; Amendment 39-11581; AD 2000-03-21 Contact: Elias Natsiopoulos, 425/227-1279; fax 425/227-1181

Boeing design 747-100, -200, and 747SP Series: AD, final domination requires repetitive detailed visual and ultrasonic inspections to bring to light missing, damaged, or broken taperlock missiles in the diagonal brace underwing fittings; and corrective actions, if necessary. The actions specified by dint of this AD are intended to debar loss of the underwing fitting load path proper to missing, damaged, or spent taperlock bolts. Effective March 28 Docket No. 98-NM-339-AD; Amendment 39-11582; AD 2000-03-22 Contact: Tamara L Anderson, 425/227-2771; fax 425/227-1181

Airbus pattern A300-600 Series: AD, final method requires repetitive ultrasonic inspections to bring to light cracks on the forward fittings in the radius of frame 40 adjacent to the tension arrows in the center section of the wings, and various follow-on actions. The actions specified by the agency of this AD are intended to discover and correct fatigue cracking forward the forward fittings in the radius of frame 40 adjacent to the tension metal pin [i]or[/i] fastenings in the center section of the wings. Effective March 28 Docket No. 95-NM-150-AD; Amendment 39-11580; AD 2000-03-20 Contact: Norman B Martenson, 425/227-2110; fax 425/227-1149

Boeing archetype 747-100, -200, -300, 747SR, and 747SP Series: NPRM propos AD to annul existing AD that reduce the compliance time for accomplishment of the generally required inspection and add a strange requirement for repetitive inspections. The actions specified by way of the proposed AD are intended to expose and correct such fatigue cracking. notes due April 7. Docket No. 97-NM-88-AD. Contact: Rick Kawaguchi, 425/227-1153; fax 425/227-1181

McDonnell Douglas DC-3 and DC-4 Series: AD, final mastery requires an inspection to determine the image of airframe pneumatic deicing profits installed. This amendment also requires revising the Airplane Flight Manual (AFM) to include requirements for activation of the pneumatic deicing profits for those airplanes equipped with "modern" avails The actions specified by this AD are intended to render certain that flightcrews activate the pneumatic wing and tail deicing benefits at the first signs of ice accumulation. Effective March 28 Docket No. 99-NM-139-AD; Amendment 39-11585; AD 2000-04-03 Contact: Albert Lam, 562/627-5346; fax 562/627-5210

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